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|
{ config, pkgs, ... }:
with pkgs.lib;
let
cfg = config.services.openvpn;
inherit (pkgs) openvpn;
makeOpenVPNJob = cfg: name:
let
path = (getAttr "openvpn-${name}" config.systemd.services).path;
upScript = ''
#! /bin/sh
export PATH=${path}
# For convenience in client scripts, extract the remote domain
# name and name server.
for var in ''${!foreign_option_*}; do
x=(''${!var})
if [ "''${x[0]}" = dhcp-option ]; then
if [ "''${x[1]}" = DOMAIN ]; then domain="''${x[2]}"
elif [ "''${x[1]}" = DNS ]; then nameserver="''${x[2]}"
fi
fi
done
${cfg.up}
'';
downScript = ''
#! /bin/sh
export PATH=${path}
${cfg.down}
'';
configFile = pkgs.writeText "openvpn-config-${name}"
''
errors-to-stderr
${optionalString (cfg.up != "" || cfg.down != "") "script-security 2"}
${cfg.config}
${optionalString (cfg.up != "") "up ${pkgs.writeScript "openvpn-${name}-up" upScript}"}
${optionalString (cfg.down != "") "down ${pkgs.writeScript "openvpn-${name}-down" downScript}"}
'';
in {
description = "OpenVPN instance ‘${name}’";
wantedBy = optional cfg.autoStart "multi-user.target";
after = [ "network-interfaces.target" ];
path = [ pkgs.iptables pkgs.iproute pkgs.nettools ];
serviceConfig.ExecStart = "@${openvpn}/sbin/openvpn openvpn --config ${configFile}";
serviceConfig.Restart = "always";
};
in
{
###### interface
options = {
/* !!! Obsolete. */
services.openvpn.enable = mkOption {
default = true;
description = "Whether to enable OpenVPN.";
};
services.openvpn.servers = mkOption {
default = {};
example = literalExample ''
{
server = {
config = '''
# Simplest server configuration: http://openvpn.net/index.php/documentation/miscellaneous/static-key-mini-howto.html.
# server :
dev tun
ifconfig 10.8.0.1 10.8.0.2
secret /root/static.key
''';
up = "ip route add ...";
down = "ip route del ...";
};
client = {
config = '''
client
remote vpn.example.org
dev tun
proto tcp-client
port 8080
ca /root/.vpn/ca.crt
cert /root/.vpn/alice.crt
key /root/.vpn/alice.key
''';
up = "echo nameserver $nameserver | ''${pkgs.openresolv}/sbin/resolvconf -m 0 -a $dev";
down = "''${pkgs.openresolv}/sbin/resolvconf -d $dev";
};
}
'';
description = ''
Each attribute of this option defines an Upstart job to run an
OpenVPN instance. These can be OpenVPN servers or clients.
The name of each Upstart job is
<literal>openvpn-</literal><replaceable>name</replaceable>,
where <replaceable>name</replaceable> is the corresponding
attribute name.
'';
type = types.attrsOf types.optionSet;
options = {
config = mkOption {
type = types.lines;
description = ''
Configuration of this OpenVPN instance. See
<citerefentry><refentrytitle>openvpn</refentrytitle><manvolnum>8</manvolnum></citerefentry>
for details.
'';
};
up = mkOption {
default = "";
type = types.lines;
description = ''
Shell commands executed when the instance is starting.
'';
};
down = mkOption {
default = "";
type = types.lines;
description = ''
Shell commands executed when the instance is shutting down.
'';
};
autoStart = mkOption {
default = true;
type = types.bool;
description = "Whether this OpenVPN instance should be started automatically.";
};
};
};
};
###### implementation
config = mkIf (cfg.servers != {}) {
systemd.services = listToAttrs (mapAttrsFlatten (name: value: nameValuePair "openvpn-${name}" (makeOpenVPNJob value name)) cfg.servers);
environment.systemPackages = [ openvpn ];
boot.kernelModules = [ "tun" ];
};
}
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