stockholm/lass/2configs/wirelum.nix
2018-12-09 16:54:00 +01:00

45 lines
1.7 KiB
Nix

with import <stockholm/lib>;
{ config, pkgs, ... }: let
self = config.krebs.build.host.nets.wirelum;
isRouter = !isNull self.via;
in mkIf (hasAttr "wirelum" config.krebs.build.host.nets) {
#hack for modprobe inside containers
systemd.services."wireguard-wirelum".path = mkIf config.boot.isContainer (mkBefore [
(pkgs.writeDashBin "modprobe" ":")
]);
boot.kernel.sysctl = mkIf isRouter {
"net.ipv6.conf.all.forwarding" = 1;
};
krebs.iptables.tables.filter.INPUT.rules = [
{ predicate = "-p udp --dport ${toString self.wireguard.port}"; target = "ACCEPT"; }
];
krebs.iptables.tables.filter.FORWARD.rules = mkIf isRouter [
{ precedence = 1000; predicate = "-i wirelum -o wirelum"; target = "ACCEPT"; }
];
networking.wireguard.interfaces.wirelum = {
ips =
(optional (!isNull self.ip4) self.ip4.addr) ++
(optional (!isNull self.ip6) self.ip6.addr);
listenPort = 51820;
privateKeyFile = (toString <secrets>) + "/wirelum.key";
allowedIPsAsRoutes = true;
peers = mapAttrsToList
(_: host: {
allowedIPs = if isRouter then
(optional (!isNull host.nets.wirelum.ip4) host.nets.wirelum.ip4.addr) ++
(optional (!isNull host.nets.wirelum.ip6) host.nets.wirelum.ip6.addr)
else
host.nets.wirelum.wireguard.subnets
;
endpoint = mkIf (!isNull host.nets.wirelum.via) (host.nets.wirelum.via.ip4.addr + ":${toString host.nets.wirelum.wireguard.port}");
persistentKeepalive = mkIf (!isNull host.nets.wirelum.via) 61;
publicKey = host.nets.wirelum.wireguard.pubkey;
})
(filterAttrs (_: h: hasAttr "wirelum" h.nets) config.krebs.hosts);
};
}