commit c3b7fdb9680c85437b4cf2af62cdc3ff9fc56f89
Author: catvayor <catvayor@katvayor.net>
Date:   Tue Mar 5 21:10:00 2024 +0100

    initial

diff --git a/configMaker.nix b/configMaker.nix
new file mode 100644
index 0000000..a4a8304
--- /dev/null
+++ b/configMaker.nix
@@ -0,0 +1,107 @@
+let module_inst = {
+      interfaces = {
+        # TODO: management
+        "ge-0/0/0" = { # upstream
+          interface-mode = "trunk";
+          vlans = [ "all" ];
+          dhcp_trusted = true;
+        };
+        "ge-0/0/1" = { # AP
+          interface-mode = "trunk";
+          vlans = [ "users" "admin" ];
+        };
+        "ge-0/0/2" = { # thurne 1
+          interface-mode = "access";
+          vlans = [ 3045 ];
+        };
+        "ge-0/0/3" = { # thurne 2
+          interface-mode = "access";
+          vlans = [ 3046 ];
+        };
+      };
+      vlans = {
+        "users" = [ { begin = 3045; end = 4095; } ];
+        "admin" = [ 3000 ];
+      };
+    };
+    module = { lib, config, ... }: with lib; {
+      # NOTE: dhcp should be configured at vlan level, but this is not very satisfying,
+      # so this module tries to configured dhcp-trust on interfaces
+      # -> this implies that interfaces change the config of their vlans
+      options = {
+        interfaces =
+          let vlan_type = types.either (types.strMatching "[^\n\r]+") (types.ints.unsigned);
+              interface = {config, ...}: {
+                options = {
+                  interface-mode = mkOption { 
+                    type = types.enum [ "trunk" "access" ];
+                    #TODO: default = if ;
+                  };
+                  vlans = mkOption { type = types.listOf vlan_type; };
+                  dhcp_trusted = mkOption { type = types.bool; default = false; };
+
+                  xmlGen = mkOption { type = types.uniq types.unspecified; };
+                };
+                config.xmlGen = name:
+                let
+                  vlans = builtins.foldl'
+                      (acc: vlan: acc + "<members>${builtins.toString vlan}</members>")
+                      ""
+                      config.vlans;
+                in ''
+                  <interface>
+                    <name>${name}</name>
+                    <unit>
+                      <name>0</name>
+                      <family>
+                        <ethernet-switching>
+                          <interface-mode>${config.interface-mode}</interface-mode>
+                          <vlan>${vlans}</vlan>
+                        </ethernet-switching>
+                      </family>
+                    </unit>
+                  </interface>'';
+              };
+            in mkOption {
+              type = types.attrsOf (types.submodule interface);
+            };
+          vlans = let
+            range_type.options = {
+              begin = mkOption { type = types.ints.unsigned; };
+              end = mkOption { type = types.ints.unsigned; };
+            };
+            in mkOption {
+              type = types.attrsOf (types.listOf (types.either types.ints.unsigned (types.submodule range_type)));
+            };
+
+        # NOTE, HACK: placeholder for now
+        toplevel = mkOption {
+          type = types.uniq types.anything;
+        };
+      };
+      config.toplevel =
+        let
+          interfaces = builtins.attrValues (builtins.mapAttrs (name: mod: mod.xmlGen name) config.interfaces);
+          # { vlan = { trust = [String]; notrust = [String]; } }
+          interface_names = builtins.attrNames config.interfaces;
+          vlan_map = inter: vlan:
+            if builtins.isString vlan then
+              if config.interfaces.${inter}.dhcp_trusted then
+                { ${vlan}.trust = inter; }
+              else
+                { ${vlan}.notrust = inter; }
+            else
+              {};
+          int_map = inter: map (vlan_map inter) config.interfaces.${inter}.vlans;
+          vlan_trust_table =
+            builtins.zipAttrsWith (vlan: values: builtins.zipAttrsWith (_: ints: ints ) values)
+              (builtins.concatMap int_map interface_names);
+        in [ ''
+          <interfaces>
+          ${builtins.concatStringsSep "" interfaces}
+          </interfaces>'' vlan_trust_table];
+    };
+in (import <nixpkgs/lib>).evalModules {
+  modules = [ module module_inst ];
+}
+