# GNU Virtual Private Ethernet {config, pkgs, lib, ...}: let inherit (lib) mkOption mkIf; 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.iproute}/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 = mkOption { default = false; description = '' Whether to run gvpe ''; }; nodename = mkOption { default = null; description ='' GVPE node name ''; }; configText = mkOption { default = null; 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; example = "/root/my-gvpe-conf"; description = '' GVPE config file, if already present ''; }; ipAddress = mkOption { default = null; description = '' IP address to assign to GVPE interface ''; }; subnet = mkOption { default = null; example = "10.0.0.0/8"; description = '' IP subnet assigned to GVPE network ''; }; customIFSetup = mkOption { default = ""; 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"; }; }; }