1 files changed, 85 insertions, 0 deletions
diff --git a/nixos/modules/services/security/torsocks.nix b/nixos/modules/services/security/torsocks.nix
new file mode 100644
index 00000000000..d6974282a6b
--- /dev/null
+++ b/nixos/modules/services/security/torsocks.nix
@@ -0,0 +1,85 @@
+{ config, pkgs, ... }:
+with pkgs.lib;
+let
+
+  cfg = config.services.tor;
+
+  makeConfig = server: ''
+      server = ${toString(head (splitString ":" server))}
+      server_port = ${toString(tail (splitString ":" server))}
+
+      local = 127.0.0.0/255.128.0.0
+      local = 127.128.0.0/255.192.0.0
+      local = 169.254.0.0/255.255.0.0
+      local = 172.16.0.0/255.240.0.0
+      local = 192.168.0.0/255.255.0.0
+
+      ${cfg.torsocks.config}
+    '';
+  makeTorsocks = name: server: pkgs.writeTextFile {
+    name = name;
+    text = ''
+        #!${pkgs.stdenv.shell}
+        TORSOCKS_CONF_FILE=${pkgs.writeText "torsocks.conf" (makeConfig server)} LD_PRELOAD="${pkgs.torsocks}/lib/torsocks/libtorsocks.so $LD_PRELOAD" "$@"
+    '';
+    executable = true;
+    destination = "/bin/${name}";
+  };
+
+  torsocks = makeTorsocks "torsocks" cfg.torsocks.server;
+  torsocksFaster = makeTorsocks "torsocks-faster" cfg.torsocks.serverFaster;
+in
+
+{
+
+  ###### interface
+
+  options = {
+
+    services.tor.torsocks = {
+
+      enable = mkOption {
+        default = cfg.client.enable;
+        description = ''
+          Whether to build torsocks scipt to relay application traffic via TOR.
+        '';
+      };
+
+      server = mkOption {
+        default = cfg.client.socksListenAddress;
+        example = "192.168.0.20:9050";
+        description = ''
+          IP address of TOR client to use.
+        '';
+      };
+
+      serverFaster = mkOption {
+        default = cfg.client.socksListenAddressFaster;
+        example = "192.168.0.20:9063";
+        description = ''
+          IP address of TOR client to use for applications like web browsers which
+	  need less circuit isolation to achive satisfactory performance.
+        '';
+      };
+
+      config = mkOption {
+        default = "";
+        description = ''
+          Extra configuration. Contents will be added verbatim to torsocks
+          configuration file.
+        '';
+      };
+
+    };
+
+  };
+
+  ###### implementation
+
+  config = mkIf cfg.torsocks.enable {
+
+    environment.systemPackages = [ torsocks torsocksFaster ];  # expose it to the users
+
+  };
+
+}