Pull request #1329: 3529 validate dhcpv4

Merge in DNS/adguard-home from 3529-validate-dhcpv4 to master

Squashed commit of the following:

commit 2f2455aa13a41398cd2846f31be96da9d34ba95d
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Tue Oct 19 19:18:12 2021 +0300

    dhcpv4: better test && fix changelog

commit ec4ff9180e8390fb739b3be0fc76fd2c715fe691
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 19:08:44 2021 +0300

    dhcpv4: better tests

commit e0e2f27b7a063ed84af170b16c3f87636cb738d2
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 18:55:47 2021 +0300

    dhcpv4: better tests

commit 73e1d08e1265e336ee6339d5021f90883fe3e395
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 18:47:21 2021 +0300

    dhcpv4: better tests

commit f636fc316123f26b6e2930afb4b22c18024ec93d
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 18:47:07 2021 +0300

    all: updated golibs

commit 86dd107a1d483ac24bd8c26422324eb8b9c3d086
Merge: 51aaf6d9 b296fa22
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 17:18:17 2021 +0300

    Merge branch 'master' into 3529-validate-dhcpv4

commit 51aaf6d9eb5fbe2b4304254dc6782305a19c53fa
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 17:18:02 2021 +0300

    dhcpv4: better changelog

commit 720b896bb595c57fab6d376f88c8a4b1d131db40
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 17:14:25 2021 +0300

    dhcpv4: better tests

commit 1098beffca8d5feb2ec104d26419210962c9a97d
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 12:08:26 2021 +0300

    dhcp: changelog

commit d1f6c89d68657431fb261658133c67e9e3135c1c
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 12:03:06 2021 +0300

    dhcpv4: fixed tests

commit 8b6713468fc04321c5238300df90bbb2d67ee679
Merge: 9991e9cb 3fa38fb4
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 11:57:57 2021 +0300

    Merge branch 'master' into 3529-validate-dhcpv4

commit 9991e9cbee7dc87d8fa1d7e86e6cc7e09ab6938c
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 11:55:40 2021 +0300

    dhcpv4: added tests

commit 5798a80de6c060365c1c647326d46cc13ccf28cb
Author: Dmitriy Seregin <d.seregin@adguard.com>
Date:   Mon Oct 18 11:46:03 2021 +0300

    dhcpv4: validate subnet mask and ip range

client/src/helpers/validators.js

@@ -1,4 +1,5 @@
 import i18next from 'i18next';
+
 import {
     MAX_PORT,
     R_CIDR,
@@ -14,7 +15,7 @@ import {
     R_DOMAIN,
 } from './constants';
 import { ip4ToInt, isValidAbsolutePath } from './form';
-import { isIpInCidr } from './helpers';
+import { isIpInCidr, parseSubnetMask } from './helpers';
 
 // Validation functions
 // https://redux-form.com/8.3.0/examples/fieldlevelvalidation/
@@ -44,7 +45,7 @@ export const validateIpv4RangeEnd = (_, allValues) => {
     const { range_end, range_start } = allValues.v4;
 
     if (ip4ToInt(range_end) <= ip4ToInt(range_start)) {
-        return 'range_end_error';
+        return 'greater_range_start_error';
     }
 
     return undefined;
@@ -61,6 +62,114 @@ export const validateIpv4 = (value) => {
     return undefined;
 };
 
+/**
+ * @returns {undefined|string}
+ * @param _
+ * @param allValues
+ */
+export const validateNotInRange = (value, allValues) => {
+    const { range_start, range_end } = allValues.v4;
+
+    if (range_start && validateIpv4(range_start)) {
+        return 'form_error_ip4_range_start_format';
+    }
+
+    if (range_end && validateIpv4(range_end)) {
+        return 'form_error_ip4_range_end_format';
+    }
+
+    const isAboveMin = range_start && ip4ToInt(value) >= ip4ToInt(range_start);
+    const isBelowMax = range_end && ip4ToInt(value) <= ip4ToInt(range_end);
+
+    if (isAboveMin && isBelowMax) {
+        return i18next.t('out_of_range_error', {
+            start: range_start,
+            end: range_end,
+        });
+    }
+
+    if (!range_end && isAboveMin) {
+        return 'lower_range_start_error';
+    }
+
+    if (!range_start && isBelowMax) {
+        return 'greater_range_end_error';
+    }
+
+    return undefined;
+};
+
+/**
+ * @returns {undefined|string}
+ * @param _
+ * @param allValues
+ */
+export const validateInRange = (value, allValues) => {
+    const { rangeStart, rangeEnd } = allValues;
+
+    if (rangeStart && validateIpv4(rangeStart)) {
+        return 'form_error_ip4_range_start_format';
+    }
+
+    if (rangeEnd && validateIpv4(rangeEnd)) {
+        return 'form_error_ip4_range_end_format';
+    }
+
+    const isBelowMin = rangeStart && ip4ToInt(value) < ip4ToInt(rangeStart);
+    const isAboveMax = rangeEnd && ip4ToInt(value) > ip4ToInt(rangeEnd);
+
+    if (isAboveMax || isBelowMin) {
+        return i18next.t('in_range_error', {
+            start: rangeStart,
+            end: rangeEnd,
+        });
+    }
+
+    return undefined;
+};
+
+/**
+ * @returns {undefined|string}
+ * @param _
+ * @param allValues
+ */
+export const validateGatewaySubnetMask = (_, allValues) => {
+    if (!allValues || !allValues.v4 || !allValues.v4.subnet_mask || !allValues.v4.gateway_ip) {
+        return 'gateway_or_subnet_invalid';
+    }
+
+    const { subnet_mask, gateway_ip } = allValues.v4;
+
+    if (validateIpv4(gateway_ip)) {
+        return 'form_error_ip4_gateway_format';
+    }
+
+    return parseSubnetMask(subnet_mask) ? undefined : 'gateway_or_subnet_invalid';
+};
+
+/**
+ * @returns {undefined|string}
+ * @param value
+ * @param allValues
+ */
+export const validateIpForGatewaySubnetMask = (value, allValues) => {
+    if (!allValues || !allValues.v4 || !value) {
+        return undefined;
+    }
+
+    const {
+        gateway_ip, subnet_mask,
+    } = allValues.v4;
+
+    const subnetPrefix = parseSubnetMask(subnet_mask);
+
+    if (!isIpInCidr(value, `${gateway_ip}/${subnetPrefix}`)) {
+        return 'subnet_error';
+    }
+
+    return undefined;
+};
+
 /**
  * @param value {string}
  * @returns {undefined|string}