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hujuice
Guru
Joined: 16 Oct 2007
Posts: 352
Location: Nicosia, Cyprus
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 Posted: Wed Mar 12, 2025 7:31 am Post subject: [SOLVED] openvpn, dhcp, suspend and hooks |
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My openvpn crashes when resuming from the hibernation.
The reason is quite clear: the physical network is inactive because of the DHCP.
Both elogind and dhcpcd have hooks to handle the problem, but the solution I have found is quite "spaghetti".
dhcpcd is not aware of suspend, so the only way is to use a pre-suspend elogind hook.
On the other side, elogind is not aware of the dhcpcd procedure after resume (lost carrier, rebinding, bla bla), so the only way is a post-binding dhcpcd hook.
The two hooks work, but I find a bit strange to manage two complementary operations with different tools.
Better ideas?
| /etc/elogind/system-sleep/stop-openvpn-before-suspend: | #!/bin/bash
# -- Stop openvpn before suspend
#
# NOTE: openvpn is stopped here, before suspend, but NOT
# restarted here, because a bounded dhcp address is
# necessary. A dhcp hook is used for that.
# See: /etc/dhcpcd.exit-hook
case $1/$2 in
pre/*)
/usr/bin/logger -p daemon.info "Stopping openvpn.home before suspend."
/etc/init.d/openvpn.home stop
;;
esac |
| /etc/dhcpcd.exit-hook: | # -- Start openvpn after suspend
#
# NOTE: the runlevel is restored here, but openvpn has been
# stopped with an elogind hook.
# See: /etc/elogind/system-sleep/stop-openvpn-before-suspend
if [ "${interface}" = "eth0" ]; then
if [ "${reason}" = "BOUND" ]; then
/usr/bin/logger -p daemon.info "Restoring runlevel after bound."
/usr/bin/openrc
fi
fi |
Regards,
HUjuice
_________________
Who hasn't a spine, should have a method.
Chi non ha carattere, deve pur avere un metodo.
Last edited by hujuice on Thu Mar 13, 2025 8:28 am; edited 1 time in total |
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szatox
Advocate
Joined: 27 Aug 2013
Posts: 3550
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| Posted: Wed Mar 12, 2025 11:45 am Post subject: |
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I used to have an acpid hook that would restart my wifi after suspend. It was basically a crash recovery action.
It didn't even matter whether it was triggered by suspend event or resume event, because a suspended machine doesn't do anything useful anyway, so the restart would be relayed until after resume.
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hujuice
Guru
Joined: 16 Oct 2007
Posts: 352
Location: Nicosia, Cyprus
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| Posted: Thu Mar 13, 2025 8:27 am Post subject: |
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The solution is quite simple: manage the appropriate rc dependencies and stop the network before suspend.
openrc will do the job.
| /etc/conf.d/openvpn: | | rc_need="net.eth0" |
| /etc/elogind/system-sleep/stop-openvpn-before-suspend: | #!/bin/bash
# Stop the network to avoid openpvn crashes
NET="net.eth0"
case $1 in
pre)
if /etc/init.d/"${NET}" status; then
/usr/bin/logger -p daemon.info "Stopping network before suspend."
/etc/init.d/"${NET}" stop
fi
;;
post)
/usr/bin/logger -p daemon.info "Restoring runlevel."
/usr/bin/openrc
;;
esac |
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Chi non ha carattere, deve pur avere un metodo. |
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