zeek/scripts/policy/frameworks/software/version-changes.bro
Daniel Thayer 24da7ab839 Fix typos and formatting in the policy/frameworks docs
Also updated some tests related to these changes.
2013-10-21 01:23:08 -05:00

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##! Provides the possibility to define software names that are interesting to
##! watch for changes. A notice is generated if software versions change on a
##! host.
@load base/frameworks/notice
@load base/frameworks/software
module Software;
export {
redef enum Notice::Type += {
## For certain software, a version changing may matter. In that
## case, this notice will be generated. Software that matters
## if the version changes can be configured with the
## :bro:id:`Software::interesting_version_changes` variable.
Software_Version_Change,
};
## Some software is more interesting when the version changes and this
## is a set of all software that should raise a notice when a different
## version is seen on a host.
const interesting_version_changes: set[string] = { } &redef;
}
event log_software(rec: Info)
{
local ts = tracked[rec$host];
if ( rec$name in ts )
{
local old = ts[rec$name];
# Is it a potentially interesting version change?
if ( rec$name in interesting_version_changes )
{
local msg = fmt("%.6f %s switched from %s to %s (%s)",
network_time(), rec$software_type,
software_fmt_version(old$version),
software_fmt(rec), rec$software_type);
NOTICE([$note=Software_Version_Change, $src=rec$host,
$msg=msg, $sub=software_fmt(rec)]);
}
}
}