tv umts: import from lass

tv/3modules/default.nix

@@ -5,6 +5,7 @@
     ./hosts.nix
     ./iptables.nix
     ./nixpkgs-overlays.nix
+    ./umts.nix
     ./x0vncserver.nix
   ];
 }

tv/3modules/umts.nix

@@ -0,0 +1,112 @@
+{ config, lib, pkgs, ... }:
+
+with import <stockholm/lib>;
+
+let
+  cfg = config.tv.umts;
+
+  out = {
+    options.tv.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";
+    };
+    pppDefaults = mkOption {
+      type = types.str;
+      default = ''
+        noipdefault
+        usepeerdns
+        defaultroute
+        persist
+        noauth
+      '';
+    };
+  };
+
+  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
+
+  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 = ''
+    [Dialer 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
+    PPPD Path = ${pkgs.ppp}/bin/pppd
+  '';
+
+  imp = {
+    environment.shellAliases = {
+      umts = "sudo ${umts-bin}/bin/umts";
+    };
+
+    environment.systemPackages = [
+      pkgs.ppp
+    ];
+
+    security.sudo.extraConfig = ''
+      tv ALL= (root) NOPASSWD: ${umts-bin}/bin/umts
+    '';
+
+    environment.etc = [
+      {
+        source = pkgs.writeText "wvdial.conf" wvdial-defaults;
+        target = "wvdial.conf";
+      }
+      {
+        source = pkgs.writeText "wvdial" cfg.pppDefaults;
+        target = "ppp/peers/wvdial";
+      }
+    ];
+
+    systemd.services.umts = {
+      description = "UMTS wvdial Service";
+      serviceConfig = {
+        Type = "simple";
+        Restart = "always";
+        RestartSec = "10s";
+        ExecStart = "${wvdial}/bin/wvdial -n";
+      };
+    };
+  };
+
+in out