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Commit Graph

6699 Commits (80716f860e72758cd032dec91376d056fb80743f)
 

Author SHA1 Message Date
Victor Julien 810d2d3ec6 detect: add list id to string funcs 9 years ago
Victor Julien fa885e1d85 mpm: remove pattern id logic 9 years ago
Victor Julien 69d38a3222 mpm: ac-bs use internal pattern id tracking 9 years ago
Victor Julien 4edb03ab9d mpm: ac use internal pattern id tracking 9 years ago
Victor Julien cd8283bb72 smtp: use rule_id mpm support instead of pattern id 9 years ago
Victor Julien b2fcb17859 proto detect: in mpm switch to rule id 
Use the rule id API instead of pattern id API.
 9 years ago
Victor Julien a34be23002 detect: simplify negated mpm handling 9 years ago
Victor Julien b84d6d402f detect grouping: multiple whitelist conditions 
Instead of the binary yes/no whitelisting used so far, use different
values for different sorts of whitelist reasons. The port list will
be sorted by whitelist value first, then by rule count.

The goal is to whitelist groups that have weak sigs:

 - 1 byte pattern groups

 - SYN sigs

    Rules that check for SYN packets are mostly scan detection rules.
    They will be checked often as SYN packets are very common.

    e.g. alert tcp any any -> any 22 (flags:S,12; sid:123;)

    This patch adds whitelisting for SYN-sigs, so that the sigs end up
    in as unique groups as possible.

 - negated mpm sigs

    Currently negated mpm sigs are inspected often, so they are quite
    expensive. For this reason, try to whitelist them.

These values are set during 'stage 1', rule preprocessing.
 9 years ago
Victor Julien 3c184c19cd detect grouping: port based group whitelisting 
Whitelist some ports in grouping to make sure they get their own group.
 9 years ago
Victor Julien 5772f526dc detect grouping: warn on and fix up bad sigs 
Only inspect directionless SYN scan sigs toserver. Issue a warning for
those rules.
 9 years ago
Victor Julien 2ce03fbabb detect: split non-mpm list into syn/nosyn 
Since SYN inspecting rules are expensive, this patch splits the
'non-mpm' list (i.e. the rules that are always considered) into
a 'syn' and 'non-syn' list. The SYN list is only inspected if the
packet has the SYN flag set, otherwise the non-syn list is used.

The syn-list contains _all_ rules. The non-syn list contains all
minus the rules requiring the SYN bit in a packet.
 9 years ago
Victor Julien e48d745ed7 mpm: constify search func args 9 years ago
Victor Julien 26517b8b61 detect: mpm store frees mpm_ctx' it owns 9 years ago
Victor Julien 102a82fc7b detect: use mpm store for app layer mpms 
Rework app-layer mpm setup and registration to make this possible.
 9 years ago
Victor Julien fac2cc0560 detect: mpm deduplication 
Create hash for mpm's that we can reuse. Have packet/stream mpms
use this.
 9 years ago
Victor Julien f0ba00e51d detect: remove old unused code 9 years ago
Victor Julien 10b049304f detect: set new defaults for grouping 9 years ago
Victor Julien 2ee9bf2aef detect: rename groupings vars 9 years ago
Victor Julien 1f70ccfc23 detect: remove unused grouping settings 9 years ago
Victor Julien ae80ed5964 detect: make port grouping use config limits 9 years ago
Victor Julien df529b13ce detect: change port grouping 
Update port grouping logic. Previously it would create one consistent
list w/o overlap. It largely still does this, except for the 'catch
all' port group at the end of the list. This port group contains all
the sigs that didn't fit into the other groups.
 9 years ago
Victor Julien a392812302 detect: sort/group port sigs 9 years ago
Victor Julien e570b10abe detect: display unique sgh count 9 years ago
Victor Julien eda9552e95 detect: group proto sghs 9 years ago
Victor Julien d82df4eb8b detect-mpm: make sgh setup proto aware 
Allow multi-proto, multi-direction sgh's.
 9 years ago
Victor Julien 4223ce9aba detect: remove obsolete grouping code 9 years ago
Victor Julien 9ae4cb9e02 detect: debug output 9 years ago
Victor Julien fd5a06017d detect: per port and proto rule grouping 
Replace tree based approach for rule grouping with a per port (tcp/udp)
and per protocol approach.

Grouping now looks like:

               +----+
               |icmp+--->
               +----+
               |gre +--->
               +----+
               |esp +--->
               +----+
          other|... |
        +----->-----+
        |      |N   +--->
        |      +----+
        |
        | tcp  +----+   +----+
        +----->+ 80 +-->+ 139+-->
        |      +----+   +----+
        |
        | udp  +----+   +----+
    +---+----->+ 53 +-->+ 135+-->
    |          +----+   +----+
    |toserver
+--->
    |toclient
    |
    +--->

So the first 'split' in the rules is the direction: toserver or toclient.
Rules that don't have a direction, are in both branches.

Then the split is between tcp/udp and the other protocols. For tcp and
udp port lists are used. For the other protocols, grouping is simply per
protocol.

The ports used are the destination ports for toserver sigs and source
ports for toclient sigs.
 9 years ago
Victor Julien 27e63a1e11 detect: track direction and ipproto of sgh 
Each SGH has a unique ipproto and direction.
 9 years ago
Victor Julien e75a93b125 detect: pass ipproto to rule grouping funcs 9 years ago
Victor Julien c71c991669 detect: delay sgh cleanup 9 years ago
Victor Julien bb662a65f8 detect: delay sgh mpm setup 9 years ago
Victor Julien 18dd54dfa7 Start rule inspect with mask check 9 years ago
Victor Julien bfe49b60f7 rule analyzer: add no/both direction warning 9 years ago
Victor Julien b7d81fc3b0 detect: SYN flags 
Add funcs to see if a rule needs a SYN flag in the packet.
 9 years ago
Victor Julien f720dfd21e detect: validate http_method pattern 
Leading and trailing spaces and tabs are invalid as these are not part
of the buffer as returned by libhtp.
 9 years ago
Victor Julien 66b3dba676 detect: remove dead code 9 years ago
Victor Julien b3dcdb10be detect mpm: remove dead code 9 years ago
Victor Julien 14d9ce7b2e detect/mpm: remove unused max_id param from API 9 years ago
Victor Julien 0d3f671b55 detect: constify mpm/detect funcs 9 years ago
Victor Julien 4f8e1f59a6 mpm: remove obsolete mpm algos 
Remove: ac-gfbs, wumanber, b2g, b3g.
 9 years ago
Victor Julien 262abbb49f mpm: fix ac-ks compilation on cygwin 9 years ago
Victor Julien 58e533858b detect mpm: ac-tile/ac-ks default to single 
Use sgh-mpm-context single is it is set to 'auto' when ac-ks is used.
 9 years ago
Victor Julien 0987fd16dc ac-ks: 32bit fixes 9 years ago
Victor Julien 9c2e374a3d ac-ks: fix mem leaks 9 years ago
Victor Julien 887ddf1ed8 mpm: introduce ac-ks 
Introduce 'ac-ks' or the Kenneth Steele AC implementation. It's
actually 'ac-tile' written by Ken for the Tilera platform. This
patch adds support for it on other architectures as well.

Enable ac-tile for other archs as 'ac-ks'.

Fix a bunch of OOB reads in the loops that triggered ASAN.
 9 years ago
Victor Julien 3781b00dbc Open Suricata 3.1 development branch 9 years ago
Victor Julien 71a3c4caac Update Changelog for 3.0.1 9 years ago
Mats Klepsland f9ac42b36f util-decode-der: fix NULL dereference bug 
Make sure that the length is not longer than the size of the buffer
provided.
 9 years ago
Mats Klepsland c0dd911591 util-decode-der: fix heap-buffer-overflow 9 years ago