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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.tinc;
in
{
###### interface
options = {
services.tinc = {
networks = mkOption {
default = { };
type = with types; attrsOf (submodule {
options = {
extraConfig = mkOption {
default = "";
type = types.lines;
description = ''
Extra lines to add to the tinc service configuration file.
'';
};
name = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The name of the node which is used as an identifier when communicating
with the remote nodes in the mesh. If null then the hostname of the system
is used to derive a name (note that tinc may replace non-alphanumeric characters in
hostnames by underscores).
'';
};
ed25519PrivateKeyFile = mkOption {
default = null;
type = types.nullOr types.path;
description = ''
Path of the private ed25519 keyfile.
'';
};
rsaPrivateKeyFile = mkOption {
default = null;
type = types.nullOr types.path;
description = ''
Path of the private RSA keyfile.
'';
};
debugLevel = mkOption {
default = 0;
type = types.addCheck types.int (l: l >= 0 && l <= 5);
description = ''
The amount of debugging information to add to the log. 0 means little
logging while 5 is the most logging. <command>man tincd</command> for
more details.
'';
};
hosts = mkOption {
default = { };
type = types.attrsOf types.lines;
description = ''
The name of the host in the network as well as the configuration for that host.
This name should only contain alphanumerics and underscores.
'';
};
interfaceType = mkOption {
default = "tun";
type = types.enum [ "tun" "tap" ];
description = ''
The type of virtual interface used for the network connection
'';
};
listenAddress = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The ip address to listen on for incoming connections.
'';
};
bindToAddress = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The ip address to bind to (both listen on and send packets from).
'';
};
package = mkOption {
type = types.package;
default = pkgs.tinc_pre;
defaultText = "pkgs.tinc_pre";
description = ''
The package to use for the tinc daemon's binary.
'';
};
chroot = mkOption {
default = true;
type = types.bool;
description = ''
Change process root directory to the directory where the config file is located (/etc/tinc/netname/), for added security.
The chroot is performed after all the initialization is done, after writing pid files and opening network sockets.
Note that tinc can't run scripts anymore (such as tinc-down or host-up), unless it is setup to be runnable inside chroot environment.
'';
};
};
});
description = ''
Defines the tinc networks which will be started.
Each network invokes a different daemon.
'';
};
};
};
###### implementation
config = mkIf (cfg.networks != { }) {
environment.etc = fold (a: b: a // b) { }
(flip mapAttrsToList cfg.networks (network: data:
flip mapAttrs' data.hosts (host: text: nameValuePair
("tinc/${network}/hosts/${host}")
({ mode = "0644"; user = "tinc.${network}"; inherit text; })
) // {
"tinc/${network}/tinc.conf" = {
mode = "0444";
text = ''
Name = ${if data.name == null then "$HOST" else data.name}
DeviceType = ${data.interfaceType}
${optionalString (data.ed25519PrivateKeyFile != null) "Ed25519PrivateKeyFile = ${data.ed25519PrivateKeyFile}"}
${optionalString (data.rsaPrivateKeyFile != null) "PrivateKeyFile = ${data.rsaPrivateKeyFile}"}
${optionalString (data.listenAddress != null) "ListenAddress = ${data.listenAddress}"}
${optionalString (data.bindToAddress != null) "BindToAddress = ${data.bindToAddress}"}
Interface = tinc.${network}
${data.extraConfig}
'';
};
}
));
systemd.services = flip mapAttrs' cfg.networks (network: data: nameValuePair
("tinc.${network}")
({
description = "Tinc Daemon - ${network}";
wantedBy = [ "multi-user.target" ];
path = [ data.package ];
restartTriggers = [ config.environment.etc."tinc/${network}/tinc.conf".source ];
serviceConfig = {
Type = "simple";
Restart = "always";
RestartSec = "3";
ExecStart = "${data.package}/bin/tincd -D -U tinc.${network} -n ${network} ${optionalString (data.chroot) "-R"} --pidfile /run/tinc.${network}.pid -d ${toString data.debugLevel}";
};
preStart = ''
mkdir -p /etc/tinc/${network}/hosts
chown tinc.${network} /etc/tinc/${network}/hosts
mkdir -p /etc/tinc/${network}/invitations
chown tinc.${network} /etc/tinc/${network}/invitations
# Determine how we should generate our keys
if type tinc >/dev/null 2>&1; then
# Tinc 1.1+ uses the tinc helper application for key generation
${if data.ed25519PrivateKeyFile != null then " # ed25519 Keyfile managed by nix" else ''
# Prefer ED25519 keys (only in 1.1+)
[ -f "/etc/tinc/${network}/ed25519_key.priv" ] || tinc -n ${network} generate-ed25519-keys
''}
${if data.rsaPrivateKeyFile != null then " # RSA Keyfile managed by nix" else ''
[ -f "/etc/tinc/${network}/rsa_key.priv" ] || tinc -n ${network} generate-rsa-keys 4096
''}
# In case there isn't anything to do
true
else
# Tinc 1.0 uses the tincd application
[ -f "/etc/tinc/${network}/rsa_key.priv" ] || tincd -n ${network} -K 4096
fi
'';
})
);
environment.systemPackages = let
cli-wrappers = pkgs.stdenv.mkDerivation {
name = "tinc-cli-wrappers";
buildInputs = [ pkgs.makeWrapper ];
buildCommand = ''
mkdir -p $out/bin
${concatStringsSep "\n" (mapAttrsToList (network: data:
optionalString (versionAtLeast data.package.version "1.1pre") ''
makeWrapper ${data.package}/bin/tinc "$out/bin/tinc.${network}" \
--add-flags "--pidfile=/run/tinc.${network}.pid" \
--add-flags "--config=/etc/tinc/${network}"
'') cfg.networks)}
'';
};
in [ cli-wrappers ];
users.users = flip mapAttrs' cfg.networks (network: _:
nameValuePair ("tinc.${network}") ({
description = "Tinc daemon user for ${network}";
isSystemUser = true;
})
);
};
}
|