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|
{
config,
inputs,
lib,
pkgs,
this,
...
}:
with lib;
let
cfg = config.nixfiles.modules.wireguard-ng;
DNSSetup = optionalString config.services.resolved.enable (
let
resolvectl = "${config.systemd.package}/bin/resolvectl";
in
''
${resolvectl} dns ${cfg.interface} ${cfg.server.ipv6.address} ${cfg.server.ipv4.address}
${resolvectl} domain ${cfg.interface} local ${my.domain.shire}
${resolvectl} dnssec ${cfg.interface} no
${resolvectl} dnsovertls ${cfg.interface} no
''
);
in
{
options.nixfiles.modules.wireguard-ng = {
client = {
enable = mkEnableOption "WireGuard client";
enableTrafficRouting = mkOption {
description = "Whether to enable traffic routing through the sever.";
type = with types; bool;
# default = !this.isHeadless;
default = false;
};
};
server = {
enable = mkEnableOption "WireGuard server";
ipv4.address = mkOption {
description = "IPv4 address to bind to.";
type = with types; str;
default = my.configurations.tulkas.wireguard-ng.ipv4.address;
};
ipv6.address = mkOption {
description = "IPv4 address to bind to.";
type = with types; str;
default = my.configurations.tulkas.wireguard-ng.ipv6.address;
};
address = mkOption {
description = "Endpoint address to use";
type = with types; str;
default = my.configurations.tulkas.ipv4.address;
};
port = mkOption {
description = "Endpoint port to use.";
type = with types; int;
default = 7070;
};
publicKey = mkOption {
description = "Server's public key.";
type = with types; str;
default = my.configurations.tulkas.wireguard.publicKey;
};
peers = mkOption {
description = "List of peers.";
type = with types; listOf attrs;
default =
mapAttrsToList
(
_: attr: with attr; {
inherit (wireguard-ng) publicKey;
allowedIPs = with wireguard-ng; [
"${ipv6.address}/128"
"${ipv4.address}/32"
];
}
)
(
filterAttrs (
_: attr: attr.hostname != this.hostname && hasAttr "wireguard-ng" attr
) my.configurations
);
};
};
interface = mkOption {
description = "Name of the interface to use WireGuard with.";
type = with types; str;
default = "wg70";
};
ipv4.subnet = mkOption {
description = "CIDR notation for the IPv4 subnet to use over WireGuard.";
type = with types; str;
default = "10.70.0.0/16";
};
ipv6.subnet = mkOption {
description = "CIDR notation for the IPv6 subnet to use over WireGuard.";
type = with types; str;
default = "fd70::/16";
};
};
config =
{
assertions = [
{
assertion = config.security.sudo.enable;
message = "Sudo is not enabled.";
}
{
assertion = any (x: x == "wheel") config.my.extraGroups;
message = ''User is not in the "wheel" group.'';
}
];
}
// mkMerge [
(mkIf (cfg.client.enable || cfg.server.enable) {
secrets."wireguard-private-key-${this.hostname}".file =
"${inputs.self}/secrets/wireguard-private-key-${this.hostname}";
networking.firewall.trustedInterfaces = [ cfg.interface ];
topology = with cfg; {
nodes.${this.hostname}.interfaces.${interface} = {
network = interface;
icon = "interfaces.wireguard";
};
};
})
(mkIf cfg.client.enable {
networking.wg-quick.interfaces.${cfg.interface} = mkMerge [
(with this.wireguard-ng; {
privateKeyFile = config.secrets."wireguard-private-key-${this.hostname}".path;
address = [
"${ipv4.address}/16"
"${ipv6.address}/16"
];
})
(with cfg.server; {
peers = [
{
inherit publicKey;
endpoint = "${address}:${toString port}";
allowedIPs =
if cfg.client.enableTrafficRouting then
[
"::/0"
"0.0.0.0/0"
]
else
[
cfg.ipv6.subnet
cfg.ipv4.subnet
];
}
];
dns = [
ipv6.address
ipv4.address
];
postUp = DNSSetup;
})
];
environment.systemPackages = with pkgs; [
(writeShellApplication {
name = "wg-toggle-ng";
runtimeInputs = [
iproute2
jq
];
text = ''
ip46() {
sudo ip -4 "$@"
sudo ip -6 "$@"
}
fwmark=$(sudo awg show ${cfg.interface} fwmark) || exit
if ip -j rule list lookup "$fwmark" | jq -e 'length > 0' >/dev/null; then
ip46 rule del lookup main suppress_prefixlength 0
ip46 rule del lookup "$fwmark"
else
ip46 rule add not fwmark "$fwmark" lookup "$fwmark"
ip46 rule add lookup main suppress_prefixlength 0
fi
'';
})
];
})
(mkIf cfg.server.enable {
networking = {
wireguard = {
enable = true;
interfaces.${cfg.interface} = with cfg.server; {
privateKeyFile = config.secrets."wireguard-private-key-${this.hostname}".path;
ips = [
"${ipv6.address}/16"
"${ipv4.address}/16"
];
listenPort = port;
inherit peers;
postSetup = DNSSetup;
allowedIPsAsRoutes = false;
};
};
nat = {
enable = true;
enableIPv6 = true;
externalInterface = mkDefault "eth0";
internalInterfaces = [ cfg.interface ];
internalIPs = [ cfg.ipv4.subnet ];
internalIPv6s = [ cfg.ipv6.subnet ];
};
firewall.allowedUDPPorts = [ cfg.server.port ];
};
services.prometheus.exporters.wireguard = {
enable = true;
listenAddress = mkDefault this.wireguard-ng.ipv4.address;
withRemoteIp = true;
port = 9586;
};
topology = with cfg; {
networks = {
${interface} = {
name = interface;
cidrv4 = ipv4.subnet;
cidrv6 = ipv6.subnet;
icon = "interfaces.wireguard";
};
};
nodes.${this.hostname}.interfaces.${interface}.physicalConnections =
mapAttrsToList (name: _: config.lib.topology.mkConnection name interface)
(
filterAttrs (n: v: !v.isOther && n != this.hostname && hasAttr "wireguard-ng" v) my.configurations
);
};
})
];
}
|
