luftschleuse: fix boot, add dnsmasq for wifi

luftschleuse.nix

 { config, pkgs, lib, ... }:
 
 {
-  imports = [
-    "${fetchTarball "https://github.com/NixOS/nixos-hardware/archive/9886a06e4745edb31587d0e9481ad82d35f0d593.tar.gz"}/raspberry-pi/4"
-  ];
+  boot = {
+    loader = {
+      grub.enable = false;
+      generic-extlinux-compatible.enable = true;
+    };
+    initrd.availableKernelModules = [ "vc4" ];
+    kernelParams = [ "console=tty0" ];
+  };
+
+  hardware.enableRedistributableFirmware = false;
+  hardware.firmware = [ pkgs.firmwareLinuxNonfree ];
 
   fileSystems = {
     "/" = {
@@ -18,6 +26,10 @@
     useNetworkd = true;
     useDHCP = false;
     interfaces.eth0.useDHCP = true;
+    interfaces.wlan0 = {
+      ipv4.addresses = [ { address = "192.168.2.2"; prefixLength = 24; } ];
+    };
+    firewall.trustedInterfaces = [ "wlan0" "eth0" ];
   };
 
   systemd.network.networks."40-eth0" = {
@@ -26,11 +38,6 @@
 
   boot.tmpOnTmpfs = true;
 
-  zramSwap = {
-    enable = true;
-    memoryPercent = 100;
-  };
-
   environment.systemPackages = with pkgs; [ colmena lm_sensors ];
 
   users = {
@@ -40,14 +47,24 @@
     ];
   };
 
+  services.dnsmasq = {
+    enable = true;
+    extraConfig = ''
+      bind-interfaces
+      interface=wlan0
+      bogus-priv
+      no-resolv
+      dhcp-range=192.168.2.10,192.168.2.200,1h
+      no-ping
+    '';
+  };
+
   services.hostapd = {
     enable = true;
+    interface = "wlan0";
     countryCode = "DE";
     ssid = "luftschleuse3";
     channel = 7;
     wpa = false;
-    extraConfig = ''
-      auth_alg=0
-    '';
   };
 }

modules/default.nix

@@ -15,6 +15,7 @@
     wget curl htop iftop tmux tcpdump rsync git
     alacritty.terminfo
   ];
+  documentation.nixos.enable = false;
   programs.bash.enableCompletion = true;
   programs.vim.defaultEditor = true;
   programs.zsh.enable = true;