Running WireGuard on embedded devices with older kernel versions

Running WireGuard on embedded devices with older kernel versions

[Jacob Schooley]

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I have a few verizon mobile hotspots and think this would be a perfect
place to implement wireguard. The only problem is the kernel versions
included with these hotspots:

- Novatel 5510 and Pantech MHS291 (also the Pantech UML290 USB stick) run
3.0.x
- Novatel 6620 runs 3.4.0

Also, I don't think they include CONFIG_NET_UDP_TUNNEL. Lots of proprietary
modules so the kernel can't be replaced without Novatel's sources.

These can be found pretty cheap on ebay and craigslist. I've heard the
newer ones, Netgear 791 and Novatel 7730 run 3.10 or newer, but I haven't
found any for a decent price.

OpenVPN can be run on these, but maxes out around 10mbps due to CPU
limitations.

Is there any way to run wireguard on older kernels and without this config
option?

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Re: Running WireGuard on embedded devices with older kernel versions

[Jason A. Donenfeld]

Hi Jacob,

Technically this could be done; there are other ways of hooking into
the networking stack other than the udp tunnel API. However, in
practice, my time is probably spent working for the future rather than
the past. Supporting 26 (!!) versions of Linux, back to 3.10, was
already quite the undertaking... But if you'd like to do this and send
some code upstream, I'll take patches. Take a look at src/compat.h for
some hints on how to proceed.

Jason