Wireguard fails on recent updates for OpenWRT on Turris Omnia, but same versions work on other (Linksys) routers with same CPU

[Steven Honson]

> On 22 Jul 2018, at 11:02 pm, Aaron Jones <aaronmdjones at gmail.com> wrote:
> 
> # cat /sys/module/wireguard/version

On LEDE 17.01.5 at least, `/sys/module/wireguard/version` doesn’t exist, I’m not sure if this is the same for the release candidates of OpenWrt 18.06.

Unfortunately `modinfo wireguard` doesn’t give any indication of the version either for me with LEDE 17.01.5:

# modinfo wireguard
module:		/lib/modules/4.4.140/wireguard.ko
alias:		net-pf-16-proto-16-family-wireguard
alias:		rtnl-link-wireguard
license:	GPL v2
depends:	udp_tunnel,ip6_udp_tunnel

If you have installed WireGuard from the LEDE/OpenWrt package repository, then `opkg info wireguard-tools` to check the tools, and `opkg info kmod-wireguard` to check the kernel module is one way to verify the version:

# opkg info wireguard-tools
Package: wireguard-tools
Version: 0.0.20180625-1
Depends: libc, libmnl, ip
Status: install ok installed
Section: net
...

# opkg info kmod-wireguard
Package: kmod-wireguard
Version: 4.4.140+0.0.20180519-1
Depends: kernel (= 4.4.140-1-78acdb0e5133ba67c91f7694e305d1e7), kmod-udptunnel6, kmod-udptunnel4
Status: install ok installed
...

Note that updates to the tools appear to be backported regularly to LEDE 17.01, but the kernel module appears to be as of the version available at the time of the release (17.01.5 in my case), so it isn’t unusual for these versions to not match as is the case here with mine. I’m not sure if the next release of OpenWrt will do a similar thing. It’d be nice if the kernel module updates were backported too.

Cheers,
Steven