services/proxy: add proxy module

modules/modules/services/proxy.nix

@@ -0,0 +1,40 @@
+{ config, lib, ... }:
+with lib;
+with lib.hlissner;
+let
+  cfg = config.modules.services.proxy;
+in
+{
+  options.modules.services.proxy = {
+    enable = mkBoolOpt false;
+    listen-address = mkOpt types.str "localhost:8118";
+    forwards = {
+      ssh = mkBoolOpt true;
+    };
+  };
+
+  config = mkMerge [
+    (mkIf cfg.enable {
+      services = {
+        privoxy = {
+          enable = true;
+
+          settings = {
+            enable-edit-actions = true;
+            forward-socks5 = mkIf cfg.forwards.ssh "/ 127.0.0.1:49494 .";
+            listen-address = cfg.listen-address;
+          };
+        };
+
+        ssh-tunnel = mkIf cfg.forwards.ssh {
+          enable = true;
+          server = "infinidoge@server.doge-inc.net -p 245 -S none -i /home/infinidoge/.ssh/id_ed25519 -v";
+          requiredBy = [ "privoxy.service" ];
+          forwards.dynamic = [ 49494 ];
+        };
+      };
+
+      networking.proxy.default = cfg.listen-address;
+    })
+  ];
+}