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