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authorLuciano Coelho <luciano.coelho@nokia.com>2010-06-15 15:04:00 +0200
committerPatrick McHardy <kaber@trash.net>2010-06-15 15:04:00 +0200
commit0902b469bd25065aa0688c3cee6f11744c817e7c (patch)
treeb7e1516da57ee49d98de0789a19fc283b50bf1de /net/netfilter/Kconfig
parentd73f33b168831e53972fbf7c85db87950a41436c (diff)
netfilter: xtables: idletimer target implementation
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). Cc: Timo Teras <timo.teras@iki.fi> Signed-off-by: Luciano Coelho <luciano.coelho@nokia.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'net/netfilter/Kconfig')
-rw-r--r--net/netfilter/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index 8593a77cfea9..413ed24a968a 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -424,6 +424,18 @@ config NETFILTER_XT_TARGET_HL
since you can easily create immortal packets that loop
forever on the network.
+config NETFILTER_XT_TARGET_IDLETIMER
+ tristate "IDLETIMER target support"
+ depends on NETFILTER_ADVANCED
+ help
+
+ This option adds the `IDLETIMER' target. Each matching packet
+ resets the timer associated with label specified when the rule is
+ added. When the timer expires, it triggers a sysfs notification.
+ The remaining time for expiration can be read via sysfs.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
config NETFILTER_XT_TARGET_LED
tristate '"LED" target support'
depends on LEDS_CLASS && LEDS_TRIGGERS