Adds support for interface tracking using either ping, arping or
httping. This allows to track interface status on networks with filtered
ICMP traffic or simply to monitor data link layer etc.
To facilitate binding to a specified interface its IP address is passed
as a new mwan3track parameter. It's currently required by httping
and possibly by other tools that may be added in the future.
Signed-off-by: Marcin Jurkowski <marcin1j@gmail.com>
If mwan3track will not stop immediately after sending the kill signal,
the clean_up handler will delete the pid file later while the new mwan3track is
already running.
This could result in a situation that mwan3track is running
more then once because the old mwan3track service could not be killed,
because the pid file is missing.
Using pgrep to kill all mwan3track for the tracked interface and not using
pid file should fix this issue.
Signed-off-by: Florian Eckert <fe@dev.tdt.de>
If interface is getting down by netifd (unplug ethernet cable)
mwan3track will not recognize this change. It will also generate an
additional down event when he notice does his tracking interface is offline.
Mwan3track will now be informed by a signal (trap) USR1 during down event
that the interface is already down. An additional down event will not be
generated.
Signed-off-by: Florian Eckert <fe@dev.tdt.de>
If mwan3track detects a failure the interval check will change to
"failure_interval" value until this interface is declared "offline".
After interface gets "offline" normal "interval" value is used again.
If interface ping is successful again "recovery_interval" value is used until
interface is declared "online" again.
Using the different intervals will accelerate the wan line detections on
failure and recovery.
Signed-off-by: Florian Eckert <fe@dev.tdt.de>
Florian Eckert
Marcin Jurkowski
Florian Eckert
Jeroen Louwes