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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.tinc;
in
{
###### interface
options = {
services.tinc = {
networks = mkOption {
default = { };
type = types.loaOf types.optionSet;
description = ''
Defines the tinc networks which will be started.
Each network invokes a different daemon.
'';
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.
'';
};
ed25519PrivateKeyFile = mkOption {
default = null;
type = types.nullOr types.path;
description = ''
Path of the private ed25519 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.loaOf 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.addCheck types.str (n: n == "tun" || n == "tap");
description = ''
The type of virtual interface used for the network connection
'';
};
listenAddress = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
The ip adress to bind to.
'';
};
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.
'';
};
};
};
};
};
###### 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 = "0444"; 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.listenAddress != null) "BindToAddress = ${data.listenAddress}"}
Device = /dev/net/tun
Interface = tinc.${network}
${data.extraConfig}
'';
};
}
));
networking.interfaces = flip mapAttrs' cfg.networks (network: data: nameValuePair
("tinc.${network}")
({
virtual = true;
virtualType = "${data.interfaceType}";
})
);
systemd.services = flip mapAttrs' cfg.networks (network: data: nameValuePair
("tinc.${network}")
({
description = "Tinc Daemon - ${network}";
wantedBy = [ "network.target" ];
after = [ "network-interfaces.target" ];
path = [ data.package ];
restartTriggers = [ config.environment.etc."tinc/${network}/tinc.conf".source ]
++ mapAttrsToList (host: _ : config.environment.etc."tinc/${network}/hosts/${host}".source) data.hosts;
serviceConfig = {
Type = "simple";
PIDFile = "/run/tinc.${network}.pid";
Restart = "on-failure";
};
preStart = ''
mkdir -p /etc/tinc/${network}/hosts
# 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
${if data.ed25519PrivateKeyFile != null then " # Keyfile managed by nix" else ''
# Prefer ED25519 keys (only in 1.1+)
[ -f "/etc/tinc/${network}/ed25519_key.priv" ] || tinc -n ${network} generate-ed25519-keys
''}
# Otherwise use RSA keys
[ -f "/etc/tinc/${network}/rsa_key.priv" ] || tinc -n ${network} generate-rsa-keys 4096
else
# Tinc 1.0 uses the tincd application
[ -f "/etc/tinc/${network}/rsa_key.priv" ] || tincd -n ${network} -K 4096
fi
'';
script = ''
tincd -D -U tinc.${network} -n ${network} ${optionalString (data.chroot) "-R"} --pidfile /run/tinc.${network}.pid -d ${toString data.debugLevel}
'';
})
);
users.extraUsers = flip mapAttrs' cfg.networks (network: _:
nameValuePair ("tinc.${network}") ({
description = "Tinc daemon user for ${network}";
isSystemUser = true;
})
);
};
}
|