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|
{
config,
inputs,
lib,
pkgs,
this,
...
}:
with lib; let
cfg = config.nixfiles.modules.wireguard;
in {
options.nixfiles.modules.wireguard = {
client = {
enable = mkEnableOption "WireGuard client";
enableTrafficRouting = mkOption {
description = "Whether to enable traffic routing through the sever.";
type = with types; bool;
default = !this.isHeadless;
};
};
server = {
enable = mkEnableOption "WireGuard server";
ipv4.address = mkOption {
description = "IPv4 address to bind to.";
type = with types; str;
default = my.configurations.manwe.wireguard.ipv4.address;
};
ipv6.address = mkOption {
description = "IPv4 address to bind to.";
type = with types; str;
default = my.configurations.manwe.wireguard.ipv6.address;
};
address = mkOption {
description = "Endpoint address to use";
type = with types; str;
default = my.configurations.manwe.ipv4.address;
};
port = mkOption {
description = "Endpoint port to use.";
type = with types; int;
default = 6969;
};
publicKey = mkOption {
description = "Server's public key.";
type = with types; str;
default = my.configurations.manwe.wireguard.publicKey;
};
peers = mkOption {
description = "List of peers.";
type = with types; listOf attrs;
default = mapAttrsToList (_: attr:
with attr; {
inherit (wireguard) publicKey;
allowedIPs = with wireguard; [
"${ipv4.address}/32"
"${ipv6.address}/128"
];
}) (filterAttrs (_: attr:
attr.hostname != this.hostname && hasAttr "wireguard" attr)
my.configurations);
};
};
interface = mkOption {
description = "Name of the interface to use WireGuard with.";
type = with types; str;
default = "wg69";
};
ipv4.subnet = mkOption {
description = "CIDR notation for the IPv4 subnet to use over WireGuard.";
type = with types; str;
default = "10.69.0.0/16";
};
ipv6.subnet = mkOption {
description = "CIDR notation for the IPv6 subnet to use over WireGuard.";
type = with types; str;
default = "fd69::/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-${this.hostname}";
networking.firewall.trustedInterfaces = [cfg.interface];
})
(mkIf cfg.client.enable {
networking.wg-quick.interfaces.${cfg.interface} = mkMerge [
(with this.wireguard; {
privateKeyFile = config.secrets."wireguard-private-key-${this.hostname}".path;
address = ["${ipv4.address}/16" "${ipv6.address}/16"];
})
(with cfg.server; {
peers = [
{
inherit publicKey;
endpoint = "${address}:${toString port}";
allowedIPs =
if cfg.client.enableTrafficRouting
then [
"0.0.0.0/0"
"::/0"
]
else [
cfg.ipv4.subnet
cfg.ipv6.subnet
];
persistentKeepalive = 25;
}
];
dns = [
ipv4.address
ipv6.address
]; # This assumes that the host has Unbound running.
})
];
environment.systemPackages = with pkgs; [
(writeShellApplication {
name = "wg-toggle";
runtimeInputs = [iproute2 jq wireguard-tools];
text = ''
ip46() {
sudo ip -4 "$@"
sudo ip -6 "$@"
}
fwmark=$(sudo wg 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-${this.hostname}".path;
ips = ["${ipv4.address}/16" "${ipv6.address}/16"];
listenPort = port;
inherit peers;
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.ipv4.address;
withRemoteIp = true;
port = 9586;
};
})
];
}
|
