60 lines
2.4 KiB
Nix
60 lines
2.4 KiB
Nix
with import <stockholm/lib>;
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{ config, pkgs, ... }: let
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self = config.krebs.build.host.nets.wiregrill;
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isRouter = !isNull self.via;
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in mkIf (hasAttr "wiregrill" config.krebs.build.host.nets) {
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#hack for modprobe inside containers
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systemd.services."wireguard-wiregrill".path = mkIf config.boot.isContainer (mkBefore [
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(pkgs.writeDashBin "modprobe" ":")
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]);
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boot.kernel.sysctl = mkIf isRouter {
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"net.ipv6.conf.all.forwarding" = 1;
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};
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krebs.iptables.tables.filter.INPUT.rules = [
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{ predicate = "-p udp --dport ${toString self.wireguard.port}"; target = "ACCEPT"; }
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];
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krebs.iptables.tables.filter.FORWARD.rules = mkIf isRouter (mkBefore [
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{ predicate = "-i wiregrill -o wiregrill"; target = "ACCEPT"; }
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{ predicate = "-i wiregrill -o retiolum"; target = "ACCEPT"; }
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{ predicate = "-i retiolum -o wiregrill"; target = "ACCEPT"; }
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{ predicate = "-i wiregrill -o eth0"; target = "ACCEPT"; }
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{ predicate = "-o wiregrill -m conntrack --ctstate RELATED,ESTABLISHED"; target = "ACCEPT"; }
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]);
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systemd.network.networks.wiregrill = {
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matchConfig.Name = "wiregrill";
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address =
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(optional (!isNull self.ip4) "${self.ip4.addr}/16") ++
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(optional (!isNull self.ip6) "${self.ip6.addr}/48")
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;
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networkConfig = {
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IgnoreCarrierLoss = "10s";
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};
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};
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networking.wireguard.interfaces.wiregrill = {
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ips =
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(optional (!isNull self.ip4 && !config.systemd.network.enable) self.ip4.addr) ++
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(optional (!isNull self.ip6 && !config.systemd.network.enable) self.ip6.addr);
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listenPort = 51820;
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privateKeyFile = (toString <secrets>) + "/wiregrill.key";
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allowedIPsAsRoutes = true;
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peers = mapAttrsToList
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(name: host: {
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# inherit name;
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allowedIPs = if isRouter then
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(optional (!isNull host.nets.wiregrill.ip4) host.nets.wiregrill.ip4.addr) ++
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(optional (!isNull host.nets.wiregrill.ip6) host.nets.wiregrill.ip6.addr)
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else
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host.nets.wiregrill.wireguard.subnets
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;
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endpoint = mkIf (!isNull host.nets.wiregrill.via) (host.nets.wiregrill.via.ip4.addr + ":${toString host.nets.wiregrill.wireguard.port}");
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persistentKeepalive = mkIf (!isNull host.nets.wiregrill.via) 61;
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publicKey = (replaceStrings ["\n"] [""] host.nets.wiregrill.wireguard.pubkey);
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})
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(filterAttrs (_: h: hasAttr "wiregrill" h.nets) config.krebs.hosts);
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};
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}
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