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# GNU Virtual Private Ethernet
{config, pkgs, lib, ...}:
let
inherit (lib) mkOption mkIf types;
cfg = config.services.gvpe;
finalConfig = if cfg.configFile != null then
cfg.configFile
else if cfg.configText != null then
pkgs.writeTextFile {
name = "gvpe.conf";
text = cfg.configText;
}
else
throw "You must either specify contents of the config file or the config file itself for GVPE";
ifupScript = if cfg.ipAddress == null || cfg.subnet == null then
throw "Specify IP address and subnet (with mask) for GVPE"
else if cfg.nodename == null then
throw "You must set node name for GVPE"
else
(pkgs.writeTextFile {
name = "gvpe-if-up";
text = ''
#! /bin/sh
export PATH=$PATH:${pkgs.iproute2}/sbin
ip link set $IFNAME up
ip address add ${cfg.ipAddress} dev $IFNAME
ip route add ${cfg.subnet} dev $IFNAME
${cfg.customIFSetup}
'';
executable = true;
});
in
{
options = {
services.gvpe = {
enable = lib.mkEnableOption "gvpe";
nodename = mkOption {
default = null;
type = types.nullOr types.str;
description =''
GVPE node name
'';
};
configText = mkOption {
default = null;
type = types.nullOr types.lines;
example = ''
tcp-port = 655
udp-port = 655
mtu = 1480
ifname = vpn0
node = alpha
hostname = alpha.example.org
connect = always
enable-udp = true
enable-tcp = true
on alpha if-up = if-up-0
on alpha pid-file = /var/gvpe/gvpe.pid
'';
description = ''
GVPE config contents
'';
};
configFile = mkOption {
default = null;
type = types.nullOr types.path;
example = "/root/my-gvpe-conf";
description = ''
GVPE config file, if already present
'';
};
ipAddress = mkOption {
default = null;
type = types.nullOr types.str;
description = ''
IP address to assign to GVPE interface
'';
};
subnet = mkOption {
default = null;
type = types.nullOr types.str;
example = "10.0.0.0/8";
description = ''
IP subnet assigned to GVPE network
'';
};
customIFSetup = mkOption {
default = "";
type = types.lines;
description = ''
Additional commands to apply in ifup script
'';
};
};
};
config = mkIf cfg.enable {
systemd.services.gvpe = {
description = "GNU Virtual Private Ethernet node";
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
preStart = ''
mkdir -p /var/gvpe
mkdir -p /var/gvpe/pubkey
chown root /var/gvpe
chmod 700 /var/gvpe
cp ${finalConfig} /var/gvpe/gvpe.conf
cp ${ifupScript} /var/gvpe/if-up
'';
script = "${pkgs.gvpe}/sbin/gvpe -c /var/gvpe -D ${cfg.nodename} "
+ " ${cfg.nodename}.pid-file=/var/gvpe/gvpe.pid"
+ " ${cfg.nodename}.if-up=if-up"
+ " &> /var/log/gvpe";
serviceConfig.Restart = "always";
};
};
}
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