2 files changed, 92 insertions, 0 deletions
diff --git a/lass/3modules/default.nix b/lass/3modules/default.nix
index b3037205e..6a3b41ca4 100644
--- a/lass/3modules/default.nix
+++ b/lass/3modules/default.nix
@@ -5,6 +5,7 @@ _:
     ./folderPerms.nix
     ./mysql-backup.nix
     ./power-action.nix
+    ./umts.nix
     ./urxvtd.nix
     ./wordpress_nginx.nix
     ./xresources.nix
diff --git a/lass/3modules/umts.nix b/lass/3modules/umts.nix
new file mode 100644
index 000000000..01adc0409
--- /dev/null
+++ b/lass/3modules/umts.nix
@@ -0,0 +1,91 @@
+{ config, lib, pkgs, ... }:
+
+with config.krebs.lib;
+
+let
+  cfg = config.lass.umts;
+
+  out = {
+    options.lass.umts = api;
+    config = lib.mkIf cfg.enable imp;
+  };
+
+  api = {
+    enable = mkEnableOption "umts";
+    modem = mkOption {
+      type = types.str;
+      default = "/dev/ttyUSB0";
+    };
+    initstrings = mkOption {
+      type = types.str;
+      default = ''
+        Init1 = ATZ
+        Init2 = ATQ0 V1 E1 S0=0 &C1 &D2
+      '';
+    };
+    username = mkOption {
+      type = types.str;
+      default = "default";
+    };
+    password = mkOption {
+      type = types.str;
+      default = "default";
+    };
+  };
+
+  nixpkgs-1509 = import (pkgs.fetchFromGitHub {
+    owner = "NixOS"; repo = "nixpkgs-channels";
+    rev = "91371c2bb6e20fc0df7a812332d99c38b21a2bda";
+    sha256 = "1as1i0j9d2n3iap9b471y4x01561r2s3vmjc5281qinirlr4al73";
+  }) {};
+
+  wvdial = nixpkgs-1509.wvdial; # https://github.com/NixOS/nixpkgs/issues/16113
+
+  #modem-device = "/dev/serial/by-id/usb-Lenovo_F5521gw_38214921FBBBC7B0-if09";
+  modem-device = "/dev/serial/by-id/usb-HUAWEI_Technologies_HUAWEI_Mobile-if00-port0";
+
+  # TODO: currently it is only netzclub
+  umts-bin = pkgs.writeScriptBin "umts" ''
+    #!/bin/sh
+    set -euf
+    systemctl start umts
+    trap "systemctl stop umts;trap - INT TERM EXIT;exit" INT TERM EXIT
+    echo nameserver 8.8.8.8 | tee -a /etc/resolv.conf
+    journalctl -xfu umts
+  '';
+
+  wvdial-defaults = ''
+    Modem = ${cfg.modem}
+    ${cfg.initstrings}
+    Modem Type = Analog Modem
+    Baud = 460800
+    phone= *99#
+    Username = ${cfg.username}
+    Password = ${cfg.password}
+    Stupid Mode = 1
+    Idle Seconds = 0
+  '';
+
+  imp = {
+    environment.shellAliases = {
+      umts = "sudo ${umts-bin}/bin/umts";
+    };
+
+    security.sudo.extraConfig = ''
+      lass ALL= (root) NOPASSWD: ${umts-bin}/bin/umts
+    '';
+
+    environment.wvdial.dialerDefaults = wvdial-defaults;
+
+    systemd.services.umts = {
+      description = "UMTS wvdial Service";
+      serviceConfig = {
+        Type = "simple";
+        Restart = "always";
+        RestartSec = "10s";
+        ExecStart = "${wvdial}/bin/wvdial -n";
+      };
+    };
+  };
+
+in out