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ovpn: implement keepalive mechanism

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OpenVPN supports configuring a periodic keepalive packet.
message to allow the remote endpoint detect link failures.

This change implements the keepalive sending and timer expiring logic.

Signed-off-by: Antonio Quartulli <antonio@openvpn.net>
Link: https://patch.msgid.link/20250415-b4-ovpn-v26-16-577f6097b964@openvpn.net
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Antonio Quartulli 2025-04-15 13:17:33 +02:00 • committed by Paolo Abeni
commit 3ecfd9349f
6 changed files with 311 additions and 3 deletions
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