110 lines
4.1 KiB
Nix
110 lines
4.1 KiB
Nix
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{ config, pkgs, lib, ... }: with lib; with pkgs.stockholm.lib;
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let
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self = config.krebs.build.host.nets.wiregrill;
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isRouter = !isNull self.via; # via "internet" is not set
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ext-if = config.makefu.server.primary-itf;
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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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"net.ipv4.conf.all.forwarding" = 1;
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};
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#networking.nat = mkIf isRouter {
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# enable = true;
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# enableIPv6 = true;
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# externalInterface = ext-if;
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# internalInterfaces = [ "wiregrill" ];
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#};
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networking.firewall = {
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allowedUDPPorts = [ self.wireguard.port ];
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interfaces.wiregrill = mkIf isRouter {
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allowedUDPPorts = [ 53 ];
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allowedTCPPorts = [ 53 ];
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};
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};
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# host secret
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sops.secrets."wiregrill.key" = {};
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services.dnsmasq = mkIf isRouter {
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enable = true;
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resolveLocalQueries = false;
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extraConfig = /* dnsmasq */ ''
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bind-interfaces
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interface=retiolum,wiregrill
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'';
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servers = [ "1.1.1.1" ];
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};
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networking.wireguard.interfaces.wiregrill = let
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ipt = "${pkgs.iptables}/bin/iptables";
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ip6 = "${pkgs.iptables}/bin/ip6tables";
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in {
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postSetup = ''
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${ipt} -A FORWARD -i wiregrill -o retiolum -j ACCEPT
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${ipt} -A FORWARD -i wiregrill -o wiregrill -j ACCEPT
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${ipt} -A FORWARD -o wiregrill -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
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${ip6} -A FORWARD -i wiregrill -o retiolum -j ACCEPT
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${ip6} -A FORWARD -i retiolum -o wiregrill -j ACCEPT
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${ip6} -A FORWARD -i wiregrill -o wiregrill -j ACCEPT
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${ip6} -A FORWARD -o wiregrill -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
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'' + (optionalString isRouter ''
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#${ipt} -t nat -A PREROUTING -s 10.244.245.0/24 -j ACCEPT
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#${ipt} -t nat -A POSTROUTING -s 10.244.245.0/24 ! -d 10.244.245.0/24 -j MASQUERADE
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#${ip6} -t nat -A PREROUTING -s 42:1::/32 -j ACCEPT
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#${ip6} -t nat -A POSTROUTING -s 42:1::/32 ! -d 42:1::/48 -j MASQUERADE
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'');
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# This undoes the above command
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postShutdown = ''
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${ipt} -D FORWARD -i wiregrill -o retiolum -j ACCEPT
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${ipt} -D FORWARD -i retiolum -o wiregrill -j ACCEPT
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${ipt} -D FORWARD -i wiregrill -o wiregrill -j ACCEPT
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${ipt} -D FORWARD -i wiregrill -o wiregrill -j ACCEPT
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${ipt} -D FORWARD -o wiregrill -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
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${ip6} -D FORWARD -i wiregrill -o retiolum -j ACCEPT
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${ip6} -D FORWARD -i retiolum -o wiregrill -j ACCEPT
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${ip6} -D FORWARD -i wiregrill -o wiregrill -j ACCEPT
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${ip6} -D FORWARD -o wiregrill -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
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'' + (optionalString isRouter ''
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${ipt} -t nat -D PREROUTING -s 10.244.245.0/24 -j ACCEPT
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${ipt} -t nat -D POSTROUTING -s 10.244.245.0/24 -j MASQUERADE
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#${ip6} -t nat -D PREROUTING -s 42:1::/32 -j ACCEPT
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#${ip6} -t nat -D POSTROUTING -s 42:1::/32 ! -d 42:1::/48 -j MASQUERADE
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'' );
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ips =
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(optional (!isNull self.ip4) self.ip4.addr) ++
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(optional (!isNull self.ip6) self.ip6.addr);
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listenPort = self.wireguard.port;
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privateKeyFile = config.sops.secrets."wiregrill.key".path;
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allowedIPsAsRoutes = true;
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peers = mapAttrsToList
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(_: host: {
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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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