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Commit Graph

44 Commits (11d3f5f67aa9c4c70d71c8cc035f716d05dc0248)

Author SHA1 Message Date
Victor Julien 433e511b63 dns: generic inspect engines for DNS 10 years ago
Victor Julien 2c8e8c2516 dns: rename type so it's purpose is more clear 10 years ago
Victor Julien 37f0bd57b6 detect-state: handle duplicate inspect/match 
If for a packet we have a TX N that has detect state and a TX N+1 that
has no detect state, but does have 'progress', we have a corner case
in stateful detection.

ContinueDetection inspects TX N, but cannot flag the rule in the
de_state_sig_array as the next (TX N+1) has already started and needs
to be inspected. 'StartDetection' however, is then unaware of the fact
that ContinueDetection already inspected the rule. It uses the per
session 'inspect_id' that is only moved forward at the end of the
detection run.

This patch adds a workaround. It uses the DetectEngineThreadCtx::
de_state_sig_array to store an offset between the 'base' inspect_id
and the inspect_id that StartDetection should use. The data type is
limited, so if the offset would be too big, a search based fall back
is implemented as well.
 10 years ago
Giuseppe Longo f0c54d4764 Detect engine for smtp file_data file_data: inspecting smtp attachments 
Create a buffer to store reassembled file chunks,
and inspect the content.
 10 years ago
Victor Julien e250040b72 detect-state: implement tx state reset for reload 
In case of Detect Reload, we need to reset active tx' state.
 11 years ago
Victor Julien da3e8ad8f6 detect-state: split flow and tx state 
Use separate data structures for storing TX and FLOW (AMATCH) detect
state.

- move state storing into util funcs
- remove de_state_m
- simplify reset state logic on reload
 11 years ago
Victor Julien 6723d03c7e http: add inspection engine for http request line 
No MPM though.
 11 years ago
DIALLO David 55c5081240 Detect-engine: Add Modbus detection engine 
Management of Modbus Tx

Based on DNS source code.

Signed-off-by: David DIALLO <diallo@et.esia.fr>
 11 years ago
Victor Julien b6e2a6f525 detect: locking update continued 
Make DeStateDetectContinueDetection get it's own alstate pointer instead
of using the one that was passed to it. We now get and use it only
inside a flow lock.
 11 years ago
Victor Julien cf31e2cc74 detect: locking update 
Make DeStateDetectStartDetection get it's own alstate pointer instead
of using the one that was passed to it. We now get and use it only
inside a flow lock.
 11 years ago
Victor Julien f5f148805c app layer: uint16_t alproto -> AppProto alproto 
This conversion was missing in a couple of places.
 12 years ago
Victor Julien edeeb7ed44 Store TX id with alerts 
When generating an alert and storing it in the packet, store the tx_id
as well. This way the output modules can log the tx_id and access the
proper tx for logging.

Issue #904.
 12 years ago
Anoop Saldanha f592c481dc Introduce a separate inspection engine for app events. 12 years ago
Victor Julien f10dd603ff DNS: adding dns_request content modifier 12 years ago
Anoop Saldanha a490176c8a More lock fixes for the transaction update. Issues reported by Coverity. 12 years ago
Anoop Saldanha d4d18e3136 Transaction engine redesigned. 
Improved accuracy, improved performance.  Performance improvement
noticeable with http heavy traffic and ruleset.

A lot of other cosmetic changes carried out as well.  Wrappers introduced
for a lot of app layer functions.

Failing dce unittests disabled.  Will be reintroduced in the updated dce
engine.

Cross transaction matching taken care of.  FPs emanating from these
matches have now disappeared.  Double inspection of transactions taken
care of as well.
 12 years ago
Anoop Saldanha 3511f91bba Add support for the new keyword - http_raw_host header. 
The corresponding pcre modifier would be 'Z'.
 13 years ago
Anoop Saldanha c4ce19a1be Add support for a new keyword to inspect http_host header. 
The corresponding content keyword would now be - http_host.
The corresponding pcre modifier would be W.
 13 years ago
Victor Julien 4cde2355bd Simplify flow resetting on de_ctx update. Detect ctx id starts at 1. So in a flow 0 means uninitialized (thus set) and if we detect flow is not equal to detect id, we reset the sgh storage and de_state. 13 years ago
Anoop Saldanha ecad4a24fa live rule support added 
To reload ruleset during engine runtime, send the USR2 signal to the engine, and the ruleset would be reloaded from the same yaml file supplied at engine startup
 13 years ago
Anoop Saldanha 988c92f71c http user agent keyword + mpm + inspection + fast pattern support added 13 years ago
Anoop Saldanha 09313cf9bd Support http stat code detection engine, fast pattern(mpm engine included). Fix http stat code setup function. Fix pcre option for stat msg keyword. With this the pcre options for server_body is Q, for stat_msg is Y and for stat_code is S 14 years ago
Anoop Saldanha 2007c2711c Support http stat msg detection engine, fast pattern(mpm engine included). Fix http stat msg setup function. Fix pcre option for stat msg keyword 14 years ago
Victor Julien c2c539942b Rework the way the http parser can tell the de_state to reset it's file section on arrival of new files in the same tx. Fixes a dead lock in the auto runmode. 14 years ago
Victor Julien 89f83e714c Introduce http_server_body keyword. 
The http_server_body content modifier modifies the previous content to inspect
the normalized (dechunked, unzipped) http_server_body. The workings are similar
to http_client_body. Additionally, a new pcre flag was introduced "/S".

To facilitate this change the signature flags field was changed to be 64 bit.
 14 years ago
Victor Julien 96d20098b0 file inspect: stateful inspection split 
Split stateful detection of the files in a HTTP state between toserver
and toclient inspection.
 14 years ago
Victor Julien 04ea70ccf7 file extract: pruning 
Add pruning of files in memory so we keep only memory what we really need.
Fix magic logic.
Reset file part of the de_state on receiving another file in the same tx.
 14 years ago
Victor Julien 23e01d23d3 Implement filestore keyword, including a way for the stateful detection engine to conclude that a file will never have to be stored. 14 years ago
Eric Leblond b055a21d63 doc: create doxygen group for state detection. 14 years ago
Victor Julien 73efb4c70f Add a app layer state and stateful detection engine counter that makes sure the stateful inspection is only done when the state changes. 14 years ago
Victor Julien 50aceb11eb Clean up stateful detection code. 14 years ago
Anoop Saldanha 966119b6aa support for http_raw_uri keyword + mpm engine 15 years ago
Anoop Saldanha c9897a44a4 fast pattern support for http_cookie. Also support relative modifiers 15 years ago
Anoop Saldanha bbbedaf963 fast pattern support for http_method. Also support relative modifiers 15 years ago
Anoop Saldanha 7ec0382774 support fast pattern for http raw header. Also support relative modifiers for http raw header 15 years ago
Anoop Saldanha c61c68fd36 mpm and fast pattern support for http_header. Also support relative modifiers for http_header 15 years ago
Anoop Saldanha 5c6a65dc58 support relative modifiers for http_client_body. Introduce body processing engine in detect-engine-hcbd.[ch] 15 years ago
Victor Julien 0d008c8135 Change stateful detection engine to be able to start the stateful detection separate from other sigs. Fixes bugs #213, #214, #215. 15 years ago
Pablo Rincon a8cb8d830b Fix for bug 186 and thresholding issue handling ip versions 15 years ago
Victor Julien b8fec77f37 Fix tcp connections that are reset (RST packet) not always inspecting the reassembled stream. Update transaction id code to make sure both directions of a transaction are inspected before incrementing the inspect_id. 15 years ago
Victor Julien 8cea3779fa Move dce payload inspection to stateful detection engine. 15 years ago
Victor Julien e8fce5f7fa Convert uricontent scanning to use the detect engine state. 15 years ago
William Metcalf 2eef905c07 GPL and Copyright header updates. 15 years ago
Victor Julien 70b32f7380 First stab at creating a stateful detection engine. 
Stateful detection for app layer detection keywords, except uricontent. Stores it's partial results in the flow structure. Other modifications:

- Generalize transaction tracking, logging and inspection.
- Adapt http and dcerpc to use the new transaction handling.
- Stream engine now always notifies app layer of a stream eof.

This commit fixes bug #124.
 15 years ago