version update needed

[Kris]

Hello, to use openvpn-dco in the latest OpenVPN version we need an updated driver. as described in my issue https://github.com/OpenVPN/ovpn-dco/issues/27 ovpn-dco kernel module older than v0.2.20230323 will not work anymore and must be upgraded. new version ovpn-dco kernel introduces ovpn-dco-v2.ko and allows openvpn to start correctly. this repo contains an older version of the driver not compatible with the latest version of openvpn. after manual adding openvpn-dco 0.2.20230323-1 everything works correctly.

2023-03-27 08:50:49 us=444996 OpenVPN 2.6.2 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] [DCO]
2023-03-27 08:50:49 us=445012 library versions: OpenSSL 3.0.5 5 Jul 2022, LZO 2.10
2023-03-27 08:50:49 us=445041 DCO version: 0.2.20230323-1-g1c2c84e

[Derrick Stanley (xeon64)]

I'm also having issues with DCO not working with the latest "normal" non-LTS Ubuntu release. All previous releases prior to Ubuntu Server 24.xx noble seemed to work fine.. this new kernel 6.8.0-31-generic does not work with the current version of DCO 0.0+git20231103-1. I have to uninstall the openvpn dco dkms module for a client to be able to connect if not it just hangs.. For some reason it can't create a tun0 device when the module is loaded. I tried compiling the latest version from github but that didn't work.. it resulted in the same issue... I'm going to see if I can rollback the kernel and see if that works.. I see no reason why it shouldn't work after doing a rollback to manic minotaur kernel + dco version.

This is the dmesg error I get..

ubuntu kernel: ovpn: cannot retrieve device in ovpn_netlink_dump_peers: -19

I've changed nothing with my routine setup.. so I'm assuming it's a issue with the new kernel.

UPDATE: rolling back to kernel 6.5 seemed to work.. no errors.. haven't tested if DCO is really working as far as speed.