1 files changed, 73 insertions, 40 deletions
diff --git a/sys/nspawn/dmz.nix b/sys/nspawn/dmz.nix
index af91f82..0192333 100644
--- a/sys/nspawn/dmz.nix
+++ b/sys/nspawn/dmz.nix
@@ -7,23 +7,29 @@ with lib; let
   hassEnable = config.local.home-assistant.enable;
 in
 {
-  options.local.nspawn.dmz = with types; {
+  options.local.nspawn.dmz = {
     enable = mkEnableOption "DMZ services in a container";
 
     net = mkOption {
-      type = str;
+      type = types.str;
     };
 
     netBits = mkOption {
-      type = int;
+      type = types.enum [ 30 ];
+    };
+
+    dmzAddr = mkOption {
+      type = types.str;
+      readOnly = true;
     };
 
     hostAddr = mkOption {
-      type = str;
+      type = types.str;
+      readOnly = true;
     };
 
     system = mkOption {
-      type = attrs;
+      type = types.raw;
     };
   };
 
@@ -49,49 +55,76 @@ in
     local = {
       mailHost.mdaListen = cfg.hostAddr;
 
-      nspawn.dmz.system =
+      nspawn.dmz =
         let
-          containerModule = { ... }: {
-            #TODO: urgente: bloquear puertos de dovecot a non-postfix con iptables
-            config = {
-              local = {
-                preset.dmz = {
-                  enable = true;
-                  container = true;
-                };
-
-                mta = {
-                  mdaAddr = mailHost.mdaListen;
-                  inherit (mailHost) saslPort lmtpPort;
-                };
-
-                web.sites.home = {
-                  enable = hassEnable;
-                  proxyUrl = "http://${cfg.hostAddr}:${toString hassPort}";
+          incrementIpv4 = bytes: (incrementIpv4' bytes).tail;
+
+          incrementIpv4' = bytes:
+            let
+              next = incrementIpv4' (tail bytes);
+              byteInc = (head bytes) + next.carry;
+            in
+            if bytes == [ ]
+            then { tail = [ ]; carry = 1; }
+            else if byteInc < 256
+            then { tail = [ byteInc ] ++ next.tail; carry = 0; }
+            else { tail = [ 0 ] ++ next.tail; carry = 1; };
+
+          joinIpv4 = bytes: concatStringsSep "." (map toString bytes);
+          hostBytes = incrementIpv4 (map toInt (splitString "." cfg.net));
+        in
+        {
+          dmzAddr = joinIpv4 (incrementIpv4 hostBytes);
+          hostAddr = joinIpv4 hostBytes;
+
+          system =
+            let
+              containerModule = { ... }: {
+                #TODO: urgente: bloquear puertos de dovecot a non-postfix con iptables
+                config = {
+                  local = {
+                    preset.dmz = {
+                      enable = true;
+                      container = true;
+                    };
+
+                    mta = {
+                      mdaAddr = mailHost.mdaListen;
+                      inherit (mailHost) saslPort lmtpPort;
+                    };
+
+                    web.sites.home = {
+                      enable = hassEnable;
+                      proxyUrl = "http://${cfg.hostAddr}:${toString hassPort}";
+                    };
+                  };
+
+                  nixpkgs = {
+                    pkgs = mkDefault pkgs;
+                    localSystem = mkDefault pkgs.stdenv.hostPlatform;
+                  };
                 };
               };
-
-              nixpkgs = {
-                pkgs = mkDefault pkgs;
-                localSystem = mkDefault pkgs.stdenv.hostPlatform;
-              };
+            in
+            # Tomado de la definición de pkgs.nixos junto con definición de nixpkgs.{pkgs,localSystem} arriba
+            import "${flakes.nixpkgs}/nixos/lib/eval-config.nix" {
+              modules = [
+                ../.
+                containerModule
+              ];
+
+              system = null;
+              specialArgs = { inherit flakes; };
             };
-          };
-        in
-        # Tomado de la definición de pkgs.nixos junto con definición de nixpkgs.{pkgs,localSystem} arriba
-        import "${flakes.nixpkgs}/nixos/lib/eval-config.nix" {
-          modules = [
-            ../.
-            containerModule
-          ];
-
-          system = null;
-          specialArgs = { inherit flakes; };
         };
     };
 
     services = {
-      home-assistant.config.http.server_host = singleton cfg.hostAddr;
+      home-assistant.config.http = {
+        server_host = [ cfg.hostAddr ];
+        trusted_proxies = [ cfg.dmzAddr ];
+        use_x_forwarded_for = true;
+      };
     };
 
     systemd = {