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with import <stockholm/lib>;
{ config, pkgs, ... }: let
self = config.krebs.build.host.nets.wiregrill;
isRouter = !isNull self.via;
in mkIf (hasAttr "wiregrill" config.krebs.build.host.nets) {
#hack for modprobe inside containers
systemd.services."wireguard-wiregrill".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 ${toString self.wireguard.port}"; target = "ACCEPT"; }
];
krebs.iptables.tables.filter.FORWARD.rules = mkIf isRouter [
{ precedence = 1000; predicate = "-i wiregrill -o wiregrill"; target = "ACCEPT"; }
{ precedence = 1000; predicate = "-i wiregrill -o retiolum"; target = "ACCEPT"; }
{ precedence = 1000; predicate = "-i retiolum -o wiregrill"; target = "ACCEPT"; }
{ precedence = 1000; predicate = "-i wiregrill -o eth0"; target = "ACCEPT"; }
{ precedence = 1000; predicate = "-o wiregrill -m conntrack --ctstate RELATED,ESTABLISHED"; target = "ACCEPT"; }
];
systemd.network.networks.wiregrill = {
matchConfig.Name = "wiregrill";
address =
(optional (!isNull self.ip4) "${self.ip4.addr}/16") ++
(optional (!isNull self.ip6) "${self.ip6.addr}/48")
;
};
networking.wireguard.interfaces.wiregrill = {
ips =
(optional (!isNull self.ip4) self.ip4.addr) ++
(optional (!isNull self.ip6) self.ip6.addr);
listenPort = 51820;
privateKeyFile = (toString <secrets>) + "/wiregrill.key";
allowedIPsAsRoutes = true;
peers = mapAttrsToList
(_: host: {
allowedIPs = if isRouter then
(optional (!isNull host.nets.wiregrill.ip4) host.nets.wiregrill.ip4.addr) ++
(optional (!isNull host.nets.wiregrill.ip6) host.nets.wiregrill.ip6.addr)
else
host.nets.wiregrill.wireguard.subnets
;
endpoint = mkIf (!isNull host.nets.wiregrill.via) (host.nets.wiregrill.via.ip4.addr + ":${toString host.nets.wiregrill.wireguard.port}");
persistentKeepalive = mkIf (!isNull host.nets.wiregrill.via) 61;
publicKey = (replaceStrings ["\n"] [""] host.nets.wiregrill.wireguard.pubkey);
})
(filterAttrs (_: h: hasAttr "wiregrill" h.nets) config.krebs.hosts);
};
}
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