zeek/scripts/base/frameworks/openflow
Christian Kreibich 1bd658da8f Support for log filter policy hooks
This adds a "policy" hook into the logging framework's streams and
filters to replace the existing log filter predicates. The hook
signature is as follows:

    hook(rec: any, id: Log::ID, filter: Log::Filter);

The logging manager invokes hooks on each log record. Hooks can veto
log records via a break, and modify them if necessary. Log filters
inherit the stream-level hook, but can override or remove the hook as
needed.

The distribution's existing log streams now come with pre-defined
hooks that users can add handlers to. Their name is standardized as
"log_policy" by convention, with additional suffixes when a module
provides multiple streams. The following adds a handler to the Conn
module's default log policy hook:

    hook Conn::log_policy(rec: Conn::Info, id: Log::ID, filter: Log::Filter)
            {
            if ( some_veto_reason(rec) )
                break;
            }

By default, this handler will get invoked for any log filter
associated with the Conn::LOG stream.

The existing predicates are deprecated for removal in 4.1 but continue
to work.
2020-09-30 12:32:45 -07:00
..
plugins Support for log filter policy hooks 2020-09-30 12:32:45 -07:00
__load__.zeek Rename all scripts to have ".zeek" file extension 2019-04-11 21:12:40 -05:00
cluster.zeek Merge remote-tracking branch 'origin/topic/seth/zeek_init' 2019-04-19 11:24:29 -07:00
consts.zeek Deprecate functions with "bro" in them. 2019-06-05 16:18:57 -07:00
main.zeek Deprecate functions with "bro" in them. 2019-06-05 16:18:57 -07:00
non-cluster.zeek Rename all scripts to have ".zeek" file extension 2019-04-11 21:12:40 -05:00
README Fix various typos in the openflow framework docs 2016-11-09 14:29:03 -06:00
types.zeek Deprecate functions with "bro" in them. 2019-06-05 16:18:57 -07:00

The OpenFlow framework exposes the data structures and functions
necessary to interface to OpenFlow capable hardware.