help me to use node_netlink to set and get wireguard config

[Sirherobrine23]

hi, I'm starting a module to manage Wireguard interfaces through node, I never got close to netlink and even close to interacting with the kernel, I'm relying entirely on wireguard-tools, wgctrl-go and pyroute2.

I'm modifying the wireguard-tools in the netlink part to know how it interacts, I'm using an pull request in my repository to store what I get, I was wondering if anyone could help me with the netlink part.

[mildsunrise]

hi! I'm currently not up for that, but if you have specific questions or issues that's welcome :)

[Sirherobrine23]

ok thanks, but I have one, I'm using the generic request to filter the families but I'm a little confused, I need to get the interfaces but I'm not able to filter the interfaces. when using the Wireguard family, in the request, I create function to filter, so not works.

[mildsunrise]

I don't understand what you're doing... you're issuing a WG_CMD_SET_DEVICE command with a hardcoded message (FAAAAAMAAgA+zNBiMHUAAAAAAAA=) to check each interface? I've never used the API, but shouldn't you put the ifindex / ifname to operate on in the message? Also, since the function is called getDevices, shouldn't you use WG_CMD_GET_DEVICE instead? Also, remember to not hardcode the family ID in the code, since it depends upon boot. You should set it to the result of getFamily(), not 2.

[mildsunrise]

I can't make any sense of the message you hardcoded there. Since it's a relatively small API, I'll add types for it...

[Sirherobrine23]

I'm going to test some things, I will still be testing.

[Sirherobrine23]

Being able to filter wireguard's network interfaces by getLinks() -> attrs -> linkinfo -> toString() (here it says it's a wireguard interface), the function is here. Now I'm going to see how to create a Wireguard interface without having to run ip link add dev {INTERFACE NAME} type wireguard.

I'm much more optimistic now that I can get the interfaces, I created a TODO in the pull request, I still have a lot to do.

[mildsunrise]

the contents of linkinfo are currently set as data, which likely indicates that the types for its contents are missing. if you want to help make node-netlink better, you can investigate what it's supposed to hold and create types for it. This is also what I'm going to do for the wireguard API.

[mildsunrise]

took me longer than expected but I've mapped the types and API, see https://github.com/mildsunrise/node_netlink/commit/59dbc1edb72ad54c951d5a3123b56616b20d4875.

I probably won't release it until it gets some testing, though

[Sirherobrine23]

ok, I'll take a look later, I'm using the embeddable-wg-library module to implement Wireguard.

[Sirherobrine23]

I'm going to port some resources I'm writing to your module.