wireguard-tools: add netifd protocol helper

[danrl]

Maintainer: Baptiste Jonglez @zorun
Run tested: OpenWRT snapshot Nov 11 2016 x86

Description: Helper script for upcoming luci-proto-wireguard

[danrl]

FYI: LuCi pull request is over here: openwrt/luci#848

[zorun]

Thanks for the pull request. I was actually testing your script this afternoon, but apparently a bit too late :) General comments are in https://github.com/danrl/luci-proto-wireguard/issues/5

Regarding the pull request, you can merge the two commits. Also, can you add +resolveip to the dependency list? Otherwise, the script fails to run because of the missing command. See other packages like xl2tpd.

[zx2c4]

Last I checked, resolveip requires a separate package. If this bit of logic is actually needed in the code, then probably the makefile should depend on having that package. I hit this snag twice when setting up my OpenWRT router a few days ago. The first time I just removed this block, and things worked fine. The second time I just installed resolveip, and things worked fine. Probably @zorun is the right man to make the call on what to do.

[danrl]

Unfortunately, yes, it is needed. Dependency is required for tunnels that add a default route. It is said to take care of creating a route to the endpoint(s) so they remain reachable in case of a new default route (if one endpoint has allowed_ips ::/0 and we create a route for ::/0 through the wg interface).

[zx2c4]

This might as well be bumped, while we're at it.

[danrl]

Will PR with updated version. This one is closed.