Luciano Coelho wrote:
This patch implements an idletimer Xtables target that can be used to
identify when interfaces have been idle for a certain period of time.
Timers are identified by labels and are created when a rule is set with a new
label. The rules also take a timeout value (in seconds) as an option. If
more than one rule uses the same timer label, the timer will be restarted
whenever any of the rules get a hit.
One entry for each timer is created in sysfs. This attribute contains the
timer remaining for the timer to expire. The attributes are located under
the xt_idletimer class:
/sys/class/xt_idletimer/timers/<label>
When the timer expires, the target module sends a sysfs notification to the
userspace, which can then decide what to do (eg. disconnect to save power).
Applied with a minor compiler warning fix:
CC [M] net/netfilter/xt_IDLETIMER.o
net/netfilter/xt_IDLETIMER.c:255: warning: initialization from
incompatible pointer type
The struct xt_tgchk_param argument to ->checkentry is const.
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