{ config, lib, pkgs, ... }: with lib; { ###### interface options = { services.retiolum = { enable = mkOption { type = types.bool; default = false; description = "Enable tinc daemon for Retiolum."; }; name = mkOption { type = types.string; default = config.networking.hostName; # Description stolen from tinc.conf(5). description = '' This is the name which identifies this tinc daemon. It must be unique for the virtual private network this daemon will connect to. The Name may only consist of alphanumeric and underscore characters. If Name starts with a $, then the contents of the environment variable that follows will be used. In that case, invalid characters will be converted to underscores. If Name is $HOST, but no such environment variable exist, the hostname will be read using the gethostnname() system call This is the name which identifies the this tinc daemon. ''; }; generateEtcHosts = mkOption { type = types.string; default = "both"; description = '' If set to <literal>short</literal>, <literal>long</literal>, or <literal>both</literal>, then generate entries in <filename>/etc/hosts</filename> from subnets. ''; }; network = mkOption { type = types.string; default = "retiolum"; description = '' The tinc network name. It is used to generate long host entries, derive the name of the user account under which tincd runs, and name the TUN device. ''; }; tincPackage = mkOption { type = types.package; default = pkgs.tinc; description = "Tincd package to use."; }; hosts = mkOption { default = null; description = '' Hosts package or path to use. If a path is given, then it will be used to generate an ad-hoc package. ''; }; iproutePackage = mkOption { type = types.package; default = pkgs.iproute; description = "Iproute2 package to use."; }; privateKeyFile = mkOption { # TODO if it's types.path then it gets copied to /nix/store with # bad unsafe permissions... type = types.string; default = "/etc/tinc/retiolum/rsa_key.priv"; description = "Generate file with <literal>tincd -K</literal>."; }; connectTo = mkOption { type = types.listOf types.string; default = [ "fastpoke" "pigstarter" "kheurop" ]; description = "TODO describe me"; }; }; }; ###### implementation config = let cfg = config.services.retiolum; tinc = cfg.tincPackage; hostsType = builtins.typeOf cfg.hosts; hosts = if hostsType == "package" then # use package as is cfg.hosts else if hostsType == "path" then # use path to generate a package pkgs.stdenv.mkDerivation { name = "custom-retiolum-hosts"; src = cfg.hosts; installPhase = '' mkdir $out find . -name .git -prune -o -type f -print0 | xargs -0 cp --target-directory $out ''; } else abort "The option `services.retiolum.hosts' must be set to a package or a path" ; iproute = cfg.iproutePackage; retiolumExtraHosts = import (pkgs.runCommand "retiolum-etc-hosts" { } '' generate() { (cd ${hosts} printf \'\' for i in `ls`; do names=$(hostnames $i) for j in `sed -En 's|^ *Aliases *= *(.+)|\1|p' $i`; do names="$names $(hostnames $j)" done sed -En ' s|^ *Subnet *= *([^ /]*)(/[0-9]*)? *$|\1 '"$names"'|p ' $i done | sort printf \'\' ) } case ${cfg.generateEtcHosts} in short) hostnames() { echo "$1"; } generate ;; long) hostnames() { echo "$1.${cfg.network}"; } generate ;; both) hostnames() { echo "$1.${cfg.network} $1"; } generate ;; *) echo '""' ;; esac > $out ''); confDir = pkgs.runCommand "retiolum" { # TODO text executable = true; preferLocalBuild = true; } '' set -euf mkdir -p $out ln -s ${hosts} $out/hosts cat > $out/tinc.conf <<EOF Name = ${cfg.name} Device = /dev/net/tun Interface = ${cfg.network} ${concatStrings (map (c : "ConnectTo = " + c + "\n") cfg.connectTo)} PrivateKeyFile = ${cfg.privateKeyFile} EOF # source: krebscode/painload/retiolum/scripts/tinc_setup/tinc-up cat > $out/tinc-up <<EOF host=$out/hosts/${cfg.name} ${iproute}/sbin/ip link set \$INTERFACE up addr4=\$(sed -n 's|^ *Subnet *= *\(10[.][^ ]*\) *$|\1|p' \$host) if [ -n "\$addr4" ];then ${iproute}/sbin/ip -4 addr add \$addr4 dev \$INTERFACE ${iproute}/sbin/ip -4 route add 10.243.0.0/16 dev \$INTERFACE fi addr6=\$(sed -n 's|^ *Subnet *= *\(42[:][^ ]*\) *$|\1|p' \$host) ${iproute}/sbin/ip -6 addr add \$addr6 dev \$INTERFACE ${iproute}/sbin/ip -6 route add 42::/16 dev \$INTERFACE EOF chmod +x $out/tinc-up ''; user = cfg.network + "-tinc"; in mkIf cfg.enable { environment.systemPackages = [ tinc hosts iproute ]; networking.extraHosts = retiolumExtraHosts; systemd.services.retiolum = { description = "Tinc daemon for Retiolum"; after = [ "network.target" ]; wantedBy = [ "multi-user.target" ]; path = [ tinc iproute ]; serviceConfig = { # TODO we cannot chroot (-R) b/c we use symlinks to hosts # and the private key. ExecStart = "${tinc}/sbin/tincd -c ${confDir} -d 0 -U ${user} -D"; SyslogIdentifier = "retiolum-tincd"; }; restartIfChanged = true; }; users.extraUsers = singleton { name = user; uid = 42; # TODO config.ids.uids.retiolum }; }; }