feat(netconf/junos): allow snmp management

lib/netconf-junos/default.nix

@@ -41,6 +41,7 @@ in
     ./system.nix
     ./vlans.nix
     ./routing-options.nix
+    ./snmp.nix
   ];
 
   options = {
@@ -102,6 +103,7 @@ in
           ${poe}
           ${access}
           ${routing-options}
+          ${snmp}
         </configuration>
       '';
       rpc = pkgs.writeText "${name}.rpc" ''

lib/netconf-junos/snmp.nix

@@ -0,0 +1,80 @@
+# SPDX-FileCopyrightText: 2025 Lubin Bailly <lubin.bailly@dgnum.eu>
+#
+# SPDX-License-Identifier: EUPL-1.2
+
+{ lib, config, ... }:
+let
+  inherit (lib)
+    concatMapAttrsStringSep
+    mkOption
+    optionalString
+    ;
+  inherit (lib.types)
+    attrsOf
+    bool
+    enum
+    str
+    submodule
+    ;
+in
+{
+  options = {
+    snmp = {
+      filter-interfaces.all-internal-interfaces = mkOption {
+        type = bool;
+        default = false;
+        description = ''
+          Whether to filter internal interfaces.
+        '';
+      };
+      community = mkOption {
+        type = attrsOf (
+          submodule (
+            { name, config, ... }:
+            {
+              options = {
+                authorization = mkOption {
+                  type = enum [
+                    "read-only"
+                    "read-write"
+                  ];
+                  description = ''
+                    Authorization type.
+                  '';
+                };
+                xml = mkOption {
+                  type = str;
+                  visible = false;
+                  readOnly = true;
+                };
+              };
+              config.xml = ''
+                <community>
+                  <name>${name}</name>
+                  <authorization>${config.authorization}</authorization>
+                </community>
+              '';
+            }
+          )
+        );
+        default = { };
+        description = ''
+          Communities for SNMPv2 access.
+        '';
+      };
+    };
+    netconf.xmls.snmp = mkOption {
+      type = str;
+      visible = false;
+      readOnly = true;
+    };
+  };
+  config.netconf.xmls.snmp = ''
+    <snmp operation="replace">
+      <filter-interfaces>
+        ${optionalString config.snmp.filter-interfaces.all-internal-interfaces "<all-internal-interfaces/>"}
+      </filter-interfaces>
+      ${concatMapAttrsStringSep "" (_: comm: comm.xml) config.snmp.community}
+    </snmp>
+  '';
+}