Pull request: 3824 fix DHCP empty form validation

Closes #3824

Squashed commit of the following:

commit 24d5770e2f276f710c011bf94e36702881ccbf1a
Merge: 8f539900 32294407
Author: Ildar Kamalov <ik@adguard.com>
Date:   Wed Nov 24 12:21:23 2021 +0300

    Merge branch 'master' into 3824-empty-values

commit 8f539900489c940c6d7068d672420a553a1da299
Merge: 4be77268 51f11d2f
Author: Ildar Kamalov <ik@adguard.com>
Date:   Tue Nov 23 19:06:44 2021 +0300

    Merge branch 'master' into 3824-empty-values

commit 4be77268ab1b3dc99b754b8002320a615db2d99e
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Nov 23 19:04:06 2021 +0300

    all: use new consts

commit 701fd9a2b82d69c6b813a4a1889c65404ac3571b
Author: Ildar Kamalov <ik@adguard.com>
Date:   Tue Nov 23 18:58:03 2021 +0300

    client: get status on reset

commit a20734cbf26a57ec96fdb6e0f868a8656751e80a
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Tue Nov 23 18:31:59 2021 +0300

    dhcpd: fix reset defaults

commit e2cb0cb0995e7b2dd3e194c5bb9fe944cf7be8f5
Author: Ildar Kamalov <ik@adguard.com>
Date:   Tue Nov 23 17:33:22 2021 +0300

    client: fix DHCP empty form validation

client/src/components/Settings/Dhcp/index.js

@@ -102,6 +102,7 @@ const Dhcp = () => {
             Object.values(DHCP_FORM_NAMES)
                 .forEach((formName) => dispatch(destroy(formName)));
             dispatch(resetDhcp());
+            dispatch(getDhcpStatus());
         }
     };
 

client/src/helpers/validators.js

@@ -68,6 +68,10 @@ export const validateIpv4 = (value) => {
  * @param allValues
  */
 export const validateNotInRange = (value, allValues) => {
+    if (!allValues.v4) {
+        return undefined;
+    }
+
     const { range_start, range_end } = allValues.v4;
 
     if (range_start && validateIpv4(range_start)) {