Firewalld: Add functionality to set forwarding. Fixes #529.

tests/integration/targets/firewalld/tasks/zone_test_cases.yml

@@ -23,6 +23,55 @@
     that:
       - result is not changed
 
+- name: Zone forwarding test
+  when: (ansible_distribution == 'RedHat' and ansible_distribution_major_version is version('8', '>='))
+  block:
+    - name: Enable zone forwarding
+      ansible.posix.firewalld:
+        zone: custom
+        forward: true
+        permanent: true
+        state: enabled
+      register: result
+
+    - name: Assert zone forwarding is enabled
+      ansible.builtin.debug:
+        var: result is changed
+
+    - name: Enable zone forwarding (verify not changed)
+      ansible.posix.firewalld:
+        zone: custom
+        forward: true
+        permanent: true
+        state: enabled
+      register: result
+
+    - name: Assert zone forwarding is enabled (verify not changed)
+      ansible.builtin.debug:
+        var: result is not changed
+
+    - name: Disable zone forwarding
+      ansible.posix.firewalld:
+        zone: custom
+        forward: false
+        permanent: true
+        state: enabled
+
+    - name: Assert zone forwarding is disabled
+      ansible.builtin.debug:
+        var: result is changed
+
+    - name: Disable zone forwarding (verify not changed)
+      ansible.posix.firewalld:
+        zone: custom
+        forward: false
+        permanent: true
+        state: enabled
+
+    - name: Assert zone forwarding is disabled (verify not changed)
+      ansible.builtin.debug:
+        var: result is not changed
+
 - name: Firewalld remove zone custom
   ansible.posix.firewalld:
     zone: custom