Merge branch 'master' of ssh://bit.adguard.com:7999/dns/adguard-home

2020-12-28 12:25:27 +03:00 · 2020-12-28 12:25:27 +03:00 · e5780fa308
parent c62dd03921 644a9b5565
commit e5780fa308
36 changed files with 699 additions and 186 deletions
--- a/AGHTechDoc.md
+++ b/AGHTechDoc.md
@ -1846,7 +1846,7 @@ Response:
 	}

 There are also deprecated properties `filter_id` and `rule` on the top level of
-the response object.  Their usaga should be replaced with
+the response object.  Their usage should be replaced with
 `rules[*].filter_list_id` and `rules[*].text` correspondingly.  See the
 _OpenAPI_ documentation and the `./openapi/CHANGELOG.md` file.

--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -56,6 +56,13 @@ and this project adheres to
 [#2391]: https://github.com/AdguardTeam/AdGuardHome/issues/2391
 [#2394]: https://github.com/AdguardTeam/AdGuardHome/issues/2394

+### Deprecated
+
+- _Go_ 1.14 support.  v0.106.0 will require at least _Go_ 1.15 to build.
+- The `darwin/386` port.  It will be removed in v0.106.0.
+- The `"rule"` and `"filter_id"` fields in `GET /filtering/check_host` and
+  `GET /querylog` responses.  They will be removed in v0.106.0 ([#2102]).
+
 ### Fixed

 - Inability to set DNS cache TTL limits ([#2459]).
--- a/HACKING.md
+++ b/HACKING.md
@ -70,6 +70,14 @@ The rules are mostly sorted in the alphabetical order.
    func TestType_Method_suffix(t *testing.T) { /* … */ }
    ```

+ *  Name parameters in interface definitions:
+
+   ```go
+   type Frobulator interface {
+           Frobulate(f Foo, b Bar) (r Result, err error)
+   }
+   ```
+
 *  Name the deferred errors (e.g. when closing something) `cerr`.

 *  No shadowing, since it can often lead to subtle bugs, especially with
@ -172,10 +180,15 @@ The rules are mostly sorted in the alphabetical order.
 *  Put utility flags in the ASCII order and **don't** group them together.  For
    example, `ls -1 -A -q`.

- *  `snake_case`, not `camelCase`.
+ *  `snake_case`, not `camelCase` for variables.  `kebab-case` for filenames.
+
+ *  UPPERCASE names for external exported variables, lowercase for local,
+    unexported ones.

 *  Use `set -e -f -u` and also `set -x` in verbose mode.

+ *  Use `readonly` liberally.
+
 *  Use the `"$var"` form instead of the `$var` form, unless word splitting is
    required.

--- a/7
+++ b/7
@ -67,10 +67,11 @@ endif

 # Version properties
 COMMIT=$(shell git rev-parse --short HEAD)
+TAG_NAME=$(shell git describe --abbrev=0)
+PRERELEASE_VERSION=$(shell git describe --abbrev=0)
 # TODO(a.garipov): The cut call is a temporary solution to trim
 # prerelease versions.  See the comment in .goreleaser.yml.
-TAG_NAME=$(shell git describe --abbrev=0 | cut -c 1-8)
-RELEASE_VERSION=$(TAG_NAME)
+RELEASE_VERSION=$(shell git describe --abbrev=0 | cut -c 1-8)
 SNAPSHOT_VERSION=$(RELEASE_VERSION)-SNAPSHOT-$(COMMIT)

 # Set proper version
@ -78,6 +79,8 @@ VERSION=
 ifeq ($(TAG_NAME),$(shell git describe --abbrev=4))
 	ifeq ($(CHANNEL),edge)
 		VERSION=$(SNAPSHOT_VERSION)
+	else ifeq ($(CHANNEL),beta)
+		VERSION=$(PRERELEASE_VERSION)
 	else
 		VERSION=$(RELEASE_VERSION)
 	endif
--- a/README.md
+++ b/README.md
@ -124,7 +124,7 @@ AdGuard Home provides a lot of features out-of-the-box with no need to install a
 > Disclaimer: some of the listed features can be added to Pi-Hole by installing additional software or by manually using SSH terminal and reconfiguring one of the utilities Pi-Hole consists of. However, in our opinion, this cannot be legitimately counted as a Pi-Hole's feature.

 | Feature                                                                 | AdGuard&nbsp;Home | Pi-Hole                                                   |
-|-------------------------------------------------------------------------|--------------|--------------------------------------------------------|
+|-------------------------------------------------------------------------|-------------------|-----------------------------------------------------------|
 | Blocking ads and trackers                                               | ✅                | ✅                                                        |
 | Customizing blocklists                                                  | ✅                | ✅                                                        |
 | Built-in DHCP server                                                    | ✅                | ✅                                                        |
@ -137,6 +137,8 @@ AdGuard Home provides a lot of features out-of-the-box with no need to install a
 | Force Safe search on search engines                                     | ✅                | ❌                                                        |
 | Per-client (device) configuration                                       | ✅                | ✅                                                        |
 | Access settings (choose who can use AGH DNS)                            | ✅                | ❌                                                        |
+| Written in a memory-safe language                                       | ✅                | ❌                                                        |
+| Running without root privileges                                         | ✅                | ❌                                                        |

 <a id="comparison-adblock"></a>
 ### How does AdGuard Home compare to traditional ad blockers
--- a/client/src/__locales/en.json
+++ b/client/src/__locales/en.json
@ -270,7 +270,7 @@
    "source_label": "Source",
    "found_in_known_domain_db": "Found in the known domains database.",
    "category_label": "Category",
-    "rule_label": "Rule",
+    "rule_label": "Rule(s)",
    "list_label": "List",
    "unknown_filter": "Unknown filter {{filterId}}",
    "known_tracker": "Known tracker",
@ -530,7 +530,6 @@
    "check_ip": "IP addresses: {{ip}}",
    "check_cname": "CNAME: {{cname}}",
    "check_reason": "Reason: {{reason}}",
-    "check_rule": "Rule: {{rule}}",
    "check_service": "Service name: {{service}}",
    "service_name": "Service name",
    "check_not_found": "Not found in your filter lists",
--- a/client/src/actions/index.js
+++ b/client/src/actions/index.js
@ -287,7 +287,7 @@ export const getDnsStatus = () => async (dispatch) => {
    try {
        checkStatus(handleRequestSuccess, handleRequestError);
    } catch (error) {
-        handleRequestError(error);
+        handleRequestError();
    }
 };

--- a/client/src/components/App/index.css
+++ b/client/src/components/App/index.css
@ -1,9 +1,9 @@
 :root {
    --yellow-pale: rgba(247, 181, 0, 0.1);
-    --green79: #67B279;
+    --green79: #67b279;
    --gray-a5: #a5a5a5;
    --gray-d8: #d8d8d8;
-    --gray-f3: #F3F3F3;
+    --gray-f3: #f3f3f3;
    --font-family-monospace: Monaco, Menlo, "Ubuntu Mono", Consolas, source-code-pro, monospace;
 }

--- a/client/src/components/Dashboard/Dashboard.css
+++ b/client/src/components/Dashboard/Dashboard.css
@ -34,7 +34,7 @@
    align-items: center;
 }

-.dashboard-title__button{
+.dashboard-title__button {
    margin: 0 0.5rem;
 }

@ -44,7 +44,7 @@
        align-items: flex-start;
    }

-    .dashboard-title__button{
+    .dashboard-title__button {
        margin: 0.5rem 0;
        display: block;
    }
--- a/client/src/components/Dashboard/index.js
+++ b/client/src/components/Dashboard/index.js
@ -44,6 +44,7 @@ const Dashboard = ({
    const refreshButton = <button
            type="button"
            className="btn btn-icon btn-outline-primary btn-sm"
+            title={t('refresh_btn')}
            onClick={() => getAllStats()}
    >
        <svg className="icons">
--- a/client/src/components/Filters/Check/Info.js
+++ b/client/src/components/Filters/Check/Info.js
@ -12,7 +12,7 @@ import {
    checkSafeSearch,
    checkSafeBrowsing,
    checkParental,
-    getFilterName,
+    getRulesToFilterList,
 } from '../../../helpers/helpers';
 import { BLOCK_ACTIONS, FILTERED, FILTERED_STATUS } from '../../../helpers/constants';
 import { toggleBlocking } from '../../../actions';
@ -41,32 +41,27 @@ const renderBlockingButton = (isFiltered, domain) => {
        </button>;
 };

-const getTitle = (reason) => {
+const getTitle = () => {
    const { t } = useTranslation();

    const filters = useSelector((state) => state.filtering.filters, shallowEqual);
    const whitelistFilters = useSelector((state) => state.filtering.whitelistFilters, shallowEqual);
-    const filter_id = useSelector((state) => state.filtering.check.filter_id);
-
-    const filterName = getFilterName(
-        filters,
-        whitelistFilters,
-        filter_id,
-        'filtered_custom_rules',
-        (filter) => (filter?.name ? t('query_log_filtered', { filter: filter.name }) : ''),
-    );
+    const rules = useSelector((state) => state.filtering.check.rules, shallowEqual);
+    const reason = useSelector((state) => state.filtering.check.reason);

    const getReasonFiltered = (reason) => {
        const filterKey = reason.replace(FILTERED, '');
        return i18next.t('query_log_filtered', { filter: filterKey });
    };

+    const ruleAndFilterNames = getRulesToFilterList(rules, filters, whitelistFilters);
+
    const REASON_TO_TITLE_MAP = {
        [FILTERED_STATUS.NOT_FILTERED_NOT_FOUND]: t('check_not_found'),
        [FILTERED_STATUS.REWRITE]: t('rewrite_applied'),
        [FILTERED_STATUS.REWRITE_HOSTS]: t('rewrite_hosts_applied'),
-        [FILTERED_STATUS.FILTERED_BLACK_LIST]: filterName,
-        [FILTERED_STATUS.NOT_FILTERED_WHITE_LIST]: filterName,
+        [FILTERED_STATUS.FILTERED_BLACK_LIST]: ruleAndFilterNames,
+        [FILTERED_STATUS.NOT_FILTERED_WHITE_LIST]: ruleAndFilterNames,
        [FILTERED_STATUS.FILTERED_SAFE_SEARCH]: getReasonFiltered(reason),
        [FILTERED_STATUS.FILTERED_SAFE_BROWSING]: getReasonFiltered(reason),
        [FILTERED_STATUS.FILTERED_PARENTAL]: getReasonFiltered(reason),
@ -78,7 +73,11 @@ const getTitle = (reason) => {

    return <>
        <div>{t('check_reason', { reason })}</div>
-        <div>{filterName}</div>
+        <div>
+            {t('rule_label')}:
+            &nbsp;
+            {ruleAndFilterNames}
+        </div>
    </>;
 };

@ -86,14 +85,13 @@ const Info = () => {
    const {
        hostname,
        reason,
-        rule,
        service_name,
        cname,
        ip_addrs,
    } = useSelector((state) => state.filtering.check, shallowEqual);
    const { t } = useTranslation();

-    const title = getTitle(reason);
+    const title = getTitle();

    const className = classNames('card mb-0 p-3', {
        'logs__row--red': checkFiltered(reason),
@ -112,7 +110,6 @@ const Info = () => {
        <div>{title}</div>
        {!onlyFiltered
        && <>
-            {rule && <div>{t('check_rule', { rule })}</div>}
            {service_name && <div>{t('check_service', { service: service_name })}</div>}
            {cname && <div>{t('check_cname', { cname })}</div>}
            {ip_addrs && <div>{t('check_ip', { ip: ip_addrs.join(', ') })}</div>}
--- a/client/src/components/Header/index.js
+++ b/client/src/components/Header/index.js
@ -46,7 +46,7 @@ const Header = () => {
                <div className="header__column">
                    <div className="d-flex align-items-center">
                        <Link to="/" className="nav-link pl-0 pr-1">
-                            <img src={logo} alt="" className="header-brand-img" />
+                            <img src={logo} alt="AdGuard Home logo" className="header-brand-img" />
                        </Link>
                        {!processing && isCoreRunning
                        && <span className={badgeClass}
--- a/client/src/components/Logs/Cells/IconTooltip.css
+++ b/client/src/components/Logs/Cells/IconTooltip.css
@ -70,7 +70,7 @@
 }

 .grid .key-colon:nth-child(odd)::after {
-    content: ':';
+    content: ":";
 }

 .grid__one-row {
@ -95,7 +95,7 @@
 }

 .title--border:before {
-    content: '';
+    content: "";
    position: absolute;
    left: 0;
    border-top: 0.5px solid var(--gray-d8) !important;
--- a/client/src/components/Logs/Cells/ResponseCell.js
+++ b/client/src/components/Logs/Cells/ResponseCell.js
@ -4,8 +4,9 @@ import classNames from 'classnames';
 import React from 'react';
 import propTypes from 'prop-types';
 import {
+    getRulesToFilterList,
    formatElapsedMs,
-    getFilterName,
+    getFilterNames,
    getServiceName,
 } from '../../../helpers/helpers';
 import { FILTERED_STATUS, FILTERED_STATUS_TO_META_MAP } from '../../../helpers/constants';
@ -18,8 +19,7 @@ const ResponseCell = ({
    response,
    status,
    upstream,
-    rule,
-    filterId,
+    rules,
    service_name,
 }) => {
    const { t } = useTranslation();
@ -36,7 +36,6 @@ const ResponseCell = ({

    const statusLabel = t(isBlockedByResponse ? 'blocked_by_cname_or_ip' : FILTERED_STATUS_TO_META_MAP[reason]?.LABEL || reason);
    const boldStatusLabel = <span className="font-weight-bold">{statusLabel}</span>;
-    const filter = getFilterName(filters, whitelistFilters, filterId);

    const renderResponses = (responseArr) => {
        if (!responseArr || responseArr.length === 0) {
@ -52,18 +51,23 @@ const ResponseCell = ({
        })}</div>;
    };

+    const rulesList = getRulesToFilterList(rules, filters, whitelistFilters);
+
    const COMMON_CONTENT = {
        encryption_status: boldStatusLabel,
        install_settings_dns: upstream,
        elapsed: formattedElapsedMs,
        response_code: status,
-        ...(service_name ? { service_name: getServiceName(service_name) } : { filter }),
-        rule_label: rule,
+        ...(service_name
+            ? { service_name: getServiceName(service_name) }
+            : { }
+        ),
+        rule_label: rulesList,
        response_table_header: renderResponses(response),
        original_response: renderResponses(originalResponse),
    };

-    const content = rule
+    const content = rules.length > 0
        ? Object.entries(COMMON_CONTENT)
        : Object.entries({
            ...COMMON_CONTENT,
@ -78,7 +82,8 @@ const ResponseCell = ({
                }
                return getServiceName(service_name);
            case FILTERED_STATUS.FILTERED_BLACK_LIST:
-                return filter;
+            case FILTERED_STATUS.NOT_FILTERED_WHITE_LIST:
+                return getFilterNames(rules, filters, whitelistFilters).join(', ');
            default:
                return formattedElapsedMs;
        }
@ -113,8 +118,10 @@ ResponseCell.propTypes = {
    response: propTypes.array.isRequired,
    status: propTypes.string.isRequired,
    upstream: propTypes.string.isRequired,
-    rule: propTypes.string,
-    filterId: propTypes.number,
+    rules: propTypes.arrayOf(propTypes.shape({
+        text: propTypes.string.isRequired,
+        filter_list_id: propTypes.number.isRequired,
+    })),
    service_name: propTypes.string,
 };

--- a/client/src/components/Logs/Cells/index.js
+++ b/client/src/components/Logs/Cells/index.js
@ -6,11 +6,11 @@ import propTypes from 'prop-types';
 import {
    captitalizeWords,
    checkFiltered,
+    getRulesToFilterList,
    formatDateTime,
    formatElapsedMs,
    formatTime,
    getBlockingClientName,
-    getFilterName,
    getServiceName,
    processContent,
 } from '../../../helpers/helpers';
@ -70,8 +70,7 @@ const Row = memo(({
            upstream,
            type,
            client_proto,
-            filterId,
-            rule,
+            rules,
            originalResponse,
            status,
            service_name,
@ -107,8 +106,6 @@ const Row = memo(({

        const sourceData = getSourceData(tracker);

-        const filter = getFilterName(filters, whitelistFilters, filterId);
-
        const {
            confirmMessage,
            buttonKey: blockingClientKey,
@ -172,8 +169,8 @@ const Row = memo(({
            response_details: 'title',
            install_settings_dns: upstream,
            elapsed: formattedElapsedMs,
-            filter: rule ? filter : null,
-            rule_label: rule,
+            rule_label: rules.length > 0
+                    && getRulesToFilterList(rules, filters, whitelistFilters),
            response_table_header: response?.join('\n'),
            response_code: status,
            client_details: 'title',
@ -235,8 +232,10 @@ Row.propTypes = {
        upstream: propTypes.string.isRequired,
        type: propTypes.string.isRequired,
        client_proto: propTypes.string.isRequired,
-        filterId: propTypes.number,
-        rule: propTypes.string,
+        rules: propTypes.arrayOf(propTypes.shape({
+            text: propTypes.string.isRequired,
+            filter_list_id: propTypes.number.isRequired,
+        })),
        originalResponse: propTypes.array,
        status: propTypes.string.isRequired,
        service_name: propTypes.string,
--- a/client/src/components/Logs/Logs.css
+++ b/client/src/components/Logs/Logs.css
@ -9,21 +9,18 @@
    --size-response: 150;
    --size-client: 123;
    --gray-216: rgba(216, 216, 216, 0.23);
-    --gray-4d: #4D4D4D;
-    --gray-f3: #F3F3F3;
+    --gray-4d: #4d4d4d;
+    --gray-f3: #f3f3f3;
    --gray-8: #888;
    --gray-3: #333;
-    --danger: #DF3812;
+    --danger: #df3812;
    --white80: rgba(255, 255, 255, 0.8);
-
-    --btn-block: #C23814;
-    --btn-block-disabled: #E3B3A6;
-    --btn-block-active: #A62200;
-
+    --btn-block: #c23814;
+    --btn-block-disabled: #e3b3a6;
+    --btn-block-active: #a62200;
    --btn-unblock: #888888;
-    --btn-unblock-disabled: #D8D8D8;
-    --btn-unblock-active: #4D4D4D;
-
+    --btn-unblock-disabled: #d8d8d8;
+    --btn-unblock-active: #4d4d4d;
    --option-border-radius: 4px;
 }

@ -87,7 +84,7 @@
 }

 .custom-select__arrow--left {
-    background: var(--white) url('../ui/svg/chevron-down.svg') no-repeat;
+    background: var(--white) url("../ui/svg/chevron-down.svg") no-repeat;
    background-position: 5px 9px;
    background-size: 22px;
 }
@ -431,3 +428,13 @@
    margin-right: 1px;
    opacity: 0.5;
 }
+
+.filteringRules__rule {
+    margin-bottom: 0;
+}
+
+.filteringRules__filter {
+    font-style: italic;
+    font-weight: normal;
+    margin-bottom: 1rem;
+}
--- a/client/src/components/ui/Icons.css
+++ b/client/src/components/ui/Icons.css
@ -6,18 +6,21 @@

 .icon--24 {
    --size: 1.5rem;
+
    width: var(--size);
    height: var(--size);
 }

 .icon--20 {
    --size: 1.25rem;
+
    width: var(--size);
    height: var(--size);
 }

 .icon--18 {
    --size: 1.125rem;
+
    width: var(--size);
    height: var(--size);
 }
--- a/client/src/helpers/helpers.js
+++ b/client/src/helpers/helpers.js
@ -7,6 +7,7 @@ import i18n from 'i18next';
 import uniqBy from 'lodash/uniqBy';
 import ipaddr from 'ipaddr.js';
 import queryString from 'query-string';
+import React from 'react';
 import { getTrackerData } from './trackers/trackers';

 import {
@ -68,6 +69,7 @@ export const normalizeLogs = (logs) => logs.map((log) => {
        time,
        filterId,
        rule,
+        rules,
        service_name,
        original_answer,
        upstream,
@ -80,6 +82,15 @@ export const normalizeLogs = (logs) => logs.map((log) => {
        return `${type}: ${value} (ttl=${ttl})`;
    }) : []);

+    let newRules = rules;
+    /* TODO 'filterId' and 'rule' are deprecated, will be removed in 0.106 */
+    if (rule !== undefined && filterId !== undefined && rules !== undefined && rules.length === 0) {
+        newRules = {
+            filter_list_id: filterId,
+            text: rule,
+        };
+    }
+
    return {
        time,
        domain,
@ -88,8 +99,10 @@ export const normalizeLogs = (logs) => logs.map((log) => {
        reason,
        client,
        client_proto,
+        /* TODO 'filterId' and 'rule' are deprecated, will be removed in 0.106 */
        filterId,
        rule,
+        rules: newRules,
        status,
        service_name,
        originalAnswer: original_answer,
@ -190,7 +203,12 @@ export const getIpList = (interfaces) => Object.values(interfaces)
    .reduce((acc, curr) => acc.concat(curr.ip_addresses), [])
    .sort();

-export const getDnsAddress = (ip, port = '') => {
+/**
+ * @param {string} ip
+ * @param {number} [port]
+ * @returns {string}
+ */
+export const getDnsAddress = (ip, port = 0) => {
    const isStandardDnsPort = port === STANDARD_DNS_PORT;
    let address = ip;

@ -205,7 +223,12 @@ export const getDnsAddress = (ip, port = '') => {
    return address;
 };

-export const getWebAddress = (ip, port = '') => {
+/**
+ * @param {string} ip
+ * @param {number} [port]
+ * @returns {string}
+ */
+export const getWebAddress = (ip, port = 0) => {
    const isStandardWebPort = port === STANDARD_WEB_PORT;
    let address = `http://${ip}`;

@ -716,6 +739,75 @@ export const getFilterName = (
    return resolveFilterName(filter);
 };

+/**
+ * @param {array} rules
+ * @param {array} filters
+ * @param {array} whitelistFilters
+ * @returns {string[]}
+ */
+export const getFilterNames = (rules, filters, whitelistFilters) => rules.map(
+    ({ filter_list_id }) => getFilterName(filters, whitelistFilters, filter_list_id),
+);
+
+/**
+ * @param {array} rules
+ * @returns {string[]}
+ */
+export const getRuleNames = (rules) => rules.map(({ text }) => text);
+
+/**
+ * @param {array} rules
+ * @param {array} filters
+ * @param {array} whitelistFilters
+ * @returns {object}
+ */
+export const getFilterNameToRulesMap = (rules, filters, whitelistFilters) => rules.reduce(
+    (acc, { text, filter_list_id }) => {
+        const filterName = getFilterName(filters, whitelistFilters, filter_list_id);
+
+        acc[filterName] = (acc[filterName] || []).concat(text);
+        return acc;
+    }, {},
+);
+
+/**
+ * @param {array} rules
+ * @param {array} filters
+ * @param {array} whitelistFilters
+ * @param {object} classes
+ * @returns {JSXElement}
+ */
+export const getRulesToFilterList = (rules, filters, whitelistFilters, classes = {
+    list: 'filteringRules',
+    rule: 'filteringRules__rule font-monospace',
+    filter: 'filteringRules__filter',
+}) => {
+    const filterNameToRulesMap = getFilterNameToRulesMap(rules, filters, whitelistFilters);
+
+    return <dl className={classes.list}>
+        {Object.entries(filterNameToRulesMap).reduce(
+            (acc, [filterName, rulesArr]) => acc
+                .concat(rulesArr.map((rule, i) => <dd key={i} className={classes.rule}>{rule}</dd>))
+                .concat(<dt className={classes.filter} key={classes.filter}>{filterName}</dt>),
+            [],
+        )}
+</dl>;
+};
+
+/**
+* @param {array} rules
+* @param {array} filters
+* @param {array} whitelistFilters
+* @returns {string}
+*/
+export const getRulesAndFilterNames = (rules, filters, whitelistFilters) => {
+    const filterNameToRulesMap = getFilterNameToRulesMap(rules, filters, whitelistFilters);
+
+    return Object.entries(filterNameToRulesMap).map(
+        ([filterName, filterRules]) => filterRules.concat(filterName).join('\n'),
+    ).join('\n\n');
+};
+
 /**
 * @param ip {string}
 * @param gateway_ip {string}
--- a/client/src/helpers/renderFormattedClientCell.js
+++ b/client/src/helpers/renderFormattedClientCell.js
@ -31,7 +31,7 @@ const getFormattedWhois = (whois) => {
 * @param {object} info.whois_info
 * @param {boolean} [isDetailed]
 * @param {boolean} [isLogs]
- * @returns {JSX.Element}
+ * @returns {JSXElement}
 */
 export const renderFormattedClientCell = (value, info, isDetailed = false, isLogs = false) => {
    let whoisContainer = null;
--- a/client/src/helpers/validators.js
+++ b/client/src/helpers/validators.js
@ -16,7 +16,7 @@ import { getLastIpv4Octet, isValidAbsolutePath } from './form';
 // https://redux-form.com/8.3.0/examples/fieldlevelvalidation/
 // If the value is valid, the validation function should return undefined.
 /**
- * @param value {string}
+ * @param value {string|number}
 * @returns {undefined|string}
 */
 export const validateRequiredValue = (value) => {
--- a/client/src/install/Setup/AddressList.js
+++ b/client/src/install/Setup/AddressList.js
@ -41,16 +41,13 @@ const AddressList = ({
 AddressList.propTypes = {
    interfaces: PropTypes.object.isRequired,
    address: PropTypes.string.isRequired,
-    port: PropTypes.oneOfType([
-        PropTypes.string,
-        PropTypes.number,
-    ]),
+    port: PropTypes.number.isRequired,
    isDns: PropTypes.bool,
 };

 renderItem.propTypes = {
    ip: PropTypes.string.isRequired,
-    port: PropTypes.string.isRequired,
+    port: PropTypes.number.isRequired,
    isDns: PropTypes.bool.isRequired,
 };

--- a/client/src/reducers/access.js
+++ b/client/src/reducers/access.js
@ -24,13 +24,7 @@ const access = handleActions(

        [actions.setAccessListRequest]: (state) => ({ ...state, processingSet: true }),
        [actions.setAccessListFailure]: (state) => ({ ...state, processingSet: false }),
-        [actions.setAccessListSuccess]: (state) => {
-            const newState = {
-                ...state,
-                processingSet: false,
-            };
-            return newState;
-        },
+        [actions.setAccessListSuccess]: (state) => ({ ...state, processingSet: false }),

        [actions.toggleClientBlockRequest]: (state) => ({ ...state, processingSet: true }),
        [actions.toggleClientBlockFailure]: (state) => ({ ...state, processingSet: false }),
--- a/go.mod
+++ b/go.mod
@ -5,7 +5,7 @@ go 1.14
 require (
 	github.com/AdguardTeam/dnsproxy v0.33.7
 	github.com/AdguardTeam/golibs v0.4.4
-	github.com/AdguardTeam/urlfilter v0.14.0
+	github.com/AdguardTeam/urlfilter v0.14.1
 	github.com/NYTimes/gziphandler v1.1.1
 	github.com/ameshkov/dnscrypt/v2 v2.0.1
 	github.com/fsnotify/fsnotify v1.4.9
--- a/go.sum
+++ b/go.sum
@ -26,8 +26,8 @@ github.com/AdguardTeam/golibs v0.4.2/go.mod h1:skKsDKIBB7kkFflLJBpfGX+G8QFTx0WKU
 github.com/AdguardTeam/golibs v0.4.4 h1:cM9UySQiYFW79zo5XRwnaIWVzfW4eNXmZktMrWbthpw=
 github.com/AdguardTeam/golibs v0.4.4/go.mod h1:skKsDKIBB7kkFflLJBpfGX+G8QFTx0WKUzB6TIgtUj4=
 github.com/AdguardTeam/gomitmproxy v0.2.0/go.mod h1:Qdv0Mktnzer5zpdpi5rAwixNJzW2FN91LjKJCkVbYGU=
-github.com/AdguardTeam/urlfilter v0.14.0 h1:+aAhOvZDVGzl5gTERB4pOJCL1zxMyw7vLecJJ6TQTCw=
-github.com/AdguardTeam/urlfilter v0.14.0/go.mod h1:klx4JbOfc4EaNb5lWLqOwfg+pVcyRukmoJRvO55lL5U=
+github.com/AdguardTeam/urlfilter v0.14.1 h1:imYls0fit9ojA6pP1hWFUEIjyoXbDF85ZM+G67bI48c=
+github.com/AdguardTeam/urlfilter v0.14.1/go.mod h1:klx4JbOfc4EaNb5lWLqOwfg+pVcyRukmoJRvO55lL5U=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
--- a/internal/dnsfilter/dnsrewrite.go
+++ b/internal/dnsfilter/dnsrewrite.go
@ -7,8 +7,8 @@ import (

 // DNSRewriteResult is the result of application of $dnsrewrite rules.
 type DNSRewriteResult struct {
-	RCode    rules.RCode              `json:",omitempty"`
 	Response DNSRewriteResultResponse `json:",omitempty"`
+	RCode    rules.RCode              `json:",omitempty"`
 }

 // DNSRewriteResultResponse is the collection of DNS response records
--- a/internal/dnsforward/dns.go
+++ b/internal/dnsforward/dns.go
@ -379,7 +379,7 @@ func processFilteringAfterResponse(ctx *dnsContext) int {

 		if len(d.Res.Answer) != 0 {
 			answer := []dns.RR{}
-			answer = append(answer, s.genCNAMEAnswer(d.Req, res.CanonName))
+			answer = append(answer, s.genAnswerCNAME(d.Req, res.CanonName))
 			answer = append(answer, d.Res.Answer...)
 			d.Res.Answer = answer
 		}
--- a/internal/dnsforward/dnsrewrite.go
+++ b/internal/dnsforward/dnsrewrite.go
@ -13,27 +13,55 @@ import (
 )

 // filterDNSRewriteResponse handles a single DNS rewrite response entry.
-// It returns the constructed answer resource record.
+// It returns the properly constructed answer resource record.
 func (s *Server) filterDNSRewriteResponse(req *dns.Msg, rr rules.RRType, v rules.RRValue) (ans dns.RR, err error) {
+	// TODO(a.garipov): As more types are added, we will probably want to
+	// use a handler-oriented approach here.  So, think of a way to decouple
+	// the answer generation logic from the Server.
+
 	switch rr {
 	case dns.TypeA, dns.TypeAAAA:
 		ip, ok := v.(net.IP)
 		if !ok {
-			return nil, fmt.Errorf("value has type %T, not net.IP", v)
+			return nil, fmt.Errorf("value for rr type %d has type %T, not net.IP", rr, v)
 		}

 		if rr == dns.TypeA {
-			return s.genAAnswer(req, ip.To4()), nil
+			return s.genAnswerA(req, ip.To4()), nil
 		}

-		return s.genAAAAAnswer(req, ip), nil
-	case dns.TypeTXT:
+		return s.genAnswerAAAA(req, ip), nil
+	case dns.TypePTR,
+		dns.TypeTXT:
 		str, ok := v.(string)
 		if !ok {
-			return nil, fmt.Errorf("value has type %T, not string", v)
+			return nil, fmt.Errorf("value for rr type %d has type %T, not string", rr, v)
 		}

-		return s.genTXTAnswer(req, []string{str}), nil
+		if rr == dns.TypeTXT {
+			return s.genAnswerTXT(req, []string{str}), nil
+		}
+
+		return s.genAnswerPTR(req, str), nil
+	case dns.TypeMX:
+		mx, ok := v.(*rules.DNSMX)
+		if !ok {
+			return nil, fmt.Errorf("value for rr type %d has type %T, not *rules.DNSMX", rr, v)
+		}
+
+		return s.genAnswerMX(req, mx), nil
+	case dns.TypeHTTPS,
+		dns.TypeSVCB:
+		svcb, ok := v.(*rules.DNSSVCB)
+		if !ok {
+			return nil, fmt.Errorf("value for rr type %d has type %T, not *rules.DNSSVCB", rr, v)
+		}
+
+		if rr == dns.TypeHTTPS {
+			return s.genAnswerHTTPS(req, svcb), nil
+		}
+
+		return s.genAnswerSVCB(req, svcb), nil
 	default:
 		log.Debug("don't know how to handle dns rr type %d, skipping", rr)

--- a/internal/dnsforward/filter.go
+++ b/internal/dnsforward/filter.go
@ -87,17 +87,17 @@ func (s *Server) filterDNSRequest(ctx *dnsContext) (*dnsfilter.Result, error) {

 		name := host
 		if len(res.CanonName) != 0 {
-			resp.Answer = append(resp.Answer, s.genCNAMEAnswer(req, res.CanonName))
+			resp.Answer = append(resp.Answer, s.genAnswerCNAME(req, res.CanonName))
 			name = res.CanonName
 		}

 		for _, ip := range res.IPList {
 			if req.Question[0].Qtype == dns.TypeA {
-				a := s.genAAnswer(req, ip.To4())
+				a := s.genAnswerA(req, ip.To4())
 				a.Hdr.Name = dns.Fqdn(name)
 				resp.Answer = append(resp.Answer, a)
 			} else if req.Question[0].Qtype == dns.TypeAAAA {
-				a := s.genAAAAAnswer(req, ip)
+				a := s.genAnswerAAAA(req, ip)
 				a.Hdr.Name = dns.Fqdn(name)
 				resp.Answer = append(resp.Answer, a)
 			}
--- a/internal/dnsforward/msg.go
+++ b/internal/dnsforward/msg.go
@ -7,6 +7,7 @@ import (
 	"github.com/AdguardTeam/AdGuardHome/internal/dnsfilter"
 	"github.com/AdguardTeam/dnsproxy/proxy"
 	"github.com/AdguardTeam/golibs/log"
+	"github.com/AdguardTeam/urlfilter/rules"
 	"github.com/miekg/dns"
 )

@ -92,48 +93,64 @@ func (s *Server) genServerFailure(request *dns.Msg) *dns.Msg {

 func (s *Server) genARecord(request *dns.Msg, ip net.IP) *dns.Msg {
 	resp := s.makeResponse(request)
-	resp.Answer = append(resp.Answer, s.genAAnswer(request, ip))
+	resp.Answer = append(resp.Answer, s.genAnswerA(request, ip))
 	return resp
 }

 func (s *Server) genAAAARecord(request *dns.Msg, ip net.IP) *dns.Msg {
 	resp := s.makeResponse(request)
-	resp.Answer = append(resp.Answer, s.genAAAAAnswer(request, ip))
+	resp.Answer = append(resp.Answer, s.genAnswerAAAA(request, ip))
 	return resp
 }

-func (s *Server) genAAnswer(req *dns.Msg, ip net.IP) *dns.A {
-	answer := new(dns.A)
-	answer.Hdr = dns.RR_Header{
+func (s *Server) hdr(req *dns.Msg, rrType rules.RRType) (h dns.RR_Header) {
+	return dns.RR_Header{
 		Name:   req.Question[0].Name,
-		Rrtype: dns.TypeA,
+		Rrtype: rrType,
 		Ttl:    s.conf.BlockedResponseTTL,
 		Class:  dns.ClassINET,
 	}
-	answer.A = ip
-	return answer
 }

-func (s *Server) genAAAAAnswer(req *dns.Msg, ip net.IP) *dns.AAAA {
-	answer := new(dns.AAAA)
-	answer.Hdr = dns.RR_Header{
-		Name:   req.Question[0].Name,
-		Rrtype: dns.TypeAAAA,
-		Ttl:    s.conf.BlockedResponseTTL,
-		Class:  dns.ClassINET,
+func (s *Server) genAnswerA(req *dns.Msg, ip net.IP) (ans *dns.A) {
+	return &dns.A{
+		Hdr: s.hdr(req, dns.TypeA),
+		A:   ip,
 	}
-	answer.AAAA = ip
-	return answer
 }

-func (s *Server) genTXTAnswer(req *dns.Msg, strs []string) (answer *dns.TXT) {
+func (s *Server) genAnswerAAAA(req *dns.Msg, ip net.IP) (ans *dns.AAAA) {
+	return &dns.AAAA{
+		Hdr:  s.hdr(req, dns.TypeAAAA),
+		AAAA: ip,
+	}
+}
+
+func (s *Server) genAnswerCNAME(req *dns.Msg, cname string) (ans *dns.CNAME) {
+	return &dns.CNAME{
+		Hdr:    s.hdr(req, dns.TypeCNAME),
+		Target: dns.Fqdn(cname),
+	}
+}
+
+func (s *Server) genAnswerMX(req *dns.Msg, mx *rules.DNSMX) (ans *dns.MX) {
+	return &dns.MX{
+		Hdr:        s.hdr(req, dns.TypePTR),
+		Preference: mx.Preference,
+		Mx:         mx.Exchange,
+	}
+}
+
+func (s *Server) genAnswerPTR(req *dns.Msg, ptr string) (ans *dns.PTR) {
+	return &dns.PTR{
+		Hdr: s.hdr(req, dns.TypePTR),
+		Ptr: ptr,
+	}
+}
+
+func (s *Server) genAnswerTXT(req *dns.Msg, strs []string) (ans *dns.TXT) {
 	return &dns.TXT{
-		Hdr: dns.RR_Header{
-			Name:   req.Question[0].Name,
-			Rrtype: dns.TypeTXT,
-			Ttl:    s.conf.BlockedResponseTTL,
-			Class:  dns.ClassINET,
-		},
+		Hdr: s.hdr(req, dns.TypeTXT),
 		Txt: strs,
 	}
 }
@ -198,19 +215,6 @@ func (s *Server) genBlockedHost(request *dns.Msg, newAddr string, d *proxy.DNSCo
 	return resp
 }

-// Make a CNAME response
-func (s *Server) genCNAMEAnswer(req *dns.Msg, cname string) *dns.CNAME {
-	answer := new(dns.CNAME)
-	answer.Hdr = dns.RR_Header{
-		Name:   req.Question[0].Name,
-		Rrtype: dns.TypeCNAME,
-		Ttl:    s.conf.BlockedResponseTTL,
-		Class:  dns.ClassINET,
-	}
-	answer.Target = dns.Fqdn(cname)
-	return answer
-}
-
 // Create REFUSED DNS response
 func (s *Server) makeResponseREFUSED(request *dns.Msg) *dns.Msg {
 	resp := dns.Msg{}
--- a/internal/dnsforward/svcbmsg.go
+++ b/internal/dnsforward/svcbmsg.go
@ -0,0 +1,168 @@
+package dnsforward
+
+import (
+	"encoding/base64"
+	"net"
+	"strconv"
+
+	"github.com/AdguardTeam/golibs/log"
+	"github.com/AdguardTeam/urlfilter/rules"
+	"github.com/miekg/dns"
+)
+
+// genAnswerHTTPS returns a properly initialized HTTPS resource record.
+//
+// See the comment on genAnswerSVCB for a list of current restrictions on
+// parameter values.
+func (s *Server) genAnswerHTTPS(req *dns.Msg, svcb *rules.DNSSVCB) (ans *dns.HTTPS) {
+	ans = &dns.HTTPS{
+		SVCB: *s.genAnswerSVCB(req, svcb),
+	}
+
+	ans.Hdr.Rrtype = dns.TypeHTTPS
+
+	return ans
+}
+
+// strToSVCBKey is the string-to-svcb-key mapping.
+//
+// See https://github.com/miekg/dns/blob/23c4faca9d32b0abbb6e179aa1aadc45ac53a916/svcb.go#L27.
+//
+// TODO(a.garipov): Propose exporting this API or something similar in the
+// github.com/miekg/dns module.
+var strToSVCBKey = map[string]dns.SVCBKey{
+	"alpn":            dns.SVCB_ALPN,
+	"echconfig":       dns.SVCB_ECHCONFIG,
+	"ipv4hint":        dns.SVCB_IPV4HINT,
+	"ipv6hint":        dns.SVCB_IPV6HINT,
+	"mandatory":       dns.SVCB_MANDATORY,
+	"no-default-alpn": dns.SVCB_NO_DEFAULT_ALPN,
+	"port":            dns.SVCB_PORT,
+}
+
+// svcbKeyHandler is a handler for one SVCB parameter key.
+type svcbKeyHandler func(valStr string) (val dns.SVCBKeyValue)
+
+// svcbKeyHandlers are the supported SVCB parameters handlers.
+var svcbKeyHandlers = map[string]svcbKeyHandler{
+	"alpn": func(valStr string) (val dns.SVCBKeyValue) {
+		return &dns.SVCBAlpn{
+			Alpn: []string{valStr},
+		}
+	},
+
+	"echconfig": func(valStr string) (val dns.SVCBKeyValue) {
+		ech, err := base64.StdEncoding.DecodeString(valStr)
+		if err != nil {
+			log.Debug("can't parse svcb/https echconfig: %s; ignoring", err)
+
+			return nil
+		}
+
+		return &dns.SVCBECHConfig{
+			ECH: ech,
+		}
+	},
+
+	"ipv4hint": func(valStr string) (val dns.SVCBKeyValue) {
+		ip := net.ParseIP(valStr)
+		if ip4 := ip.To4(); ip == nil || ip4 == nil {
+			log.Debug("can't parse svcb/https ipv4 hint %q; ignoring", valStr)
+
+			return nil
+		}
+
+		return &dns.SVCBIPv4Hint{
+			Hint: []net.IP{ip},
+		}
+	},
+
+	"ipv6hint": func(valStr string) (val dns.SVCBKeyValue) {
+		ip := net.ParseIP(valStr)
+		if ip == nil {
+			log.Debug("can't parse svcb/https ipv6 hint %q; ignoring", valStr)
+
+			return nil
+		}
+
+		return &dns.SVCBIPv6Hint{
+			Hint: []net.IP{ip},
+		}
+	},
+
+	"mandatory": func(valStr string) (val dns.SVCBKeyValue) {
+		code, ok := strToSVCBKey[valStr]
+		if !ok {
+			log.Debug("unknown svcb/https mandatory key %q, ignoring", valStr)
+
+			return nil
+		}
+
+		return &dns.SVCBMandatory{
+			Code: []dns.SVCBKey{code},
+		}
+	},
+
+	"no-default-alpn": func(_ string) (val dns.SVCBKeyValue) {
+		return &dns.SVCBNoDefaultAlpn{}
+	},
+
+	"port": func(valStr string) (val dns.SVCBKeyValue) {
+		port64, err := strconv.ParseUint(valStr, 10, 16)
+		if err != nil {
+			log.Debug("can't parse svcb/https port: %s; ignoring", err)
+
+			return nil
+		}
+
+		return &dns.SVCBPort{
+			Port: uint16(port64),
+		}
+	},
+}
+
+// genAnswerSVCB returns a properly initialized SVCB resource record.
+//
+// Currently, there are several restrictions on how the parameters are parsed.
+// Firstly, the parsing of non-contiguous values isn't supported.  Secondly, the
+// parsing of value-lists is not supported either.
+//
+//   ipv4hint=127.0.0.1             // Supported.
+//   ipv4hint="127.0.0.1"           // Unsupported.
+//   ipv4hint=127.0.0.1,127.0.0.2   // Unsupported.
+//   ipv4hint="127.0.0.1,127.0.0.2" // Unsupported.
+//
+// TODO(a.garipov): Support all of these.
+func (s *Server) genAnswerSVCB(req *dns.Msg, svcb *rules.DNSSVCB) (ans *dns.SVCB) {
+	ans = &dns.SVCB{
+		Hdr:      s.hdr(req, dns.TypeSVCB),
+		Priority: svcb.Priority,
+		Target:   svcb.Target,
+	}
+	if len(svcb.Params) == 0 {
+		return ans
+	}
+
+	values := make([]dns.SVCBKeyValue, 0, len(svcb.Params))
+	for k, valStr := range svcb.Params {
+		handler, ok := svcbKeyHandlers[k]
+		if !ok {
+			log.Debug("unknown svcb/https key %q, ignoring", k)
+
+			continue
+		}
+
+		val := handler(valStr)
+		if val == nil {
+			continue
+		}
+
+		values = append(values, val)
+	}
+
+	if len(values) > 0 {
+		ans.Value = values
+	}
+
+	return ans
+}
--- a/internal/dnsforward/svcbmsg_test.go
+++ b/internal/dnsforward/svcbmsg_test.go
@ -0,0 +1,154 @@
+package dnsforward
+
+import (
+	"net"
+	"testing"
+
+	"github.com/AdguardTeam/urlfilter/rules"
+	"github.com/miekg/dns"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGenAnswerHTTPS_andSVCB(t *testing.T) {
+	// Preconditions.
+
+	s := &Server{
+		conf: ServerConfig{
+			FilteringConfig: FilteringConfig{
+				BlockedResponseTTL: 3600,
+			},
+		},
+	}
+
+	req := &dns.Msg{
+		Question: []dns.Question{{
+			Name: "abcd",
+		}},
+	}
+
+	// Constants and helper values.
+
+	const host = "example.com"
+	const prio = 32
+
+	ip4 := net.IPv4(127, 0, 0, 1)
+	ip6 := net.IP{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}
+
+	// Helper functions.
+
+	dnssvcb := func(key, value string) (svcb *rules.DNSSVCB) {
+		svcb = &rules.DNSSVCB{
+			Target:   host,
+			Priority: prio,
+		}
+
+		if key == "" {
+			return svcb
+		}
+
+		svcb.Params = map[string]string{
+			key: value,
+		}
+
+		return svcb
+	}
+
+	wantsvcb := func(kv dns.SVCBKeyValue) (want *dns.SVCB) {
+		want = &dns.SVCB{
+			Hdr:      s.hdr(req, dns.TypeSVCB),
+			Priority: prio,
+			Target:   host,
+		}
+
+		if kv == nil {
+			return want
+		}
+
+		want.Value = []dns.SVCBKeyValue{kv}
+
+		return want
+	}
+
+	// Tests.
+
+	testCases := []struct {
+		svcb *rules.DNSSVCB
+		want *dns.SVCB
+		name string
+	}{{
+		svcb: dnssvcb("", ""),
+		want: wantsvcb(nil),
+		name: "no_params",
+	}, {
+		svcb: dnssvcb("foo", "bar"),
+		want: wantsvcb(nil),
+		name: "invalid",
+	}, {
+		svcb: dnssvcb("alpn", "h3"),
+		want: wantsvcb(&dns.SVCBAlpn{Alpn: []string{"h3"}}),
+		name: "alpn",
+	}, {
+		svcb: dnssvcb("echconfig", "AAAA"),
+		want: wantsvcb(&dns.SVCBECHConfig{ECH: []byte{0, 0, 0}}),
+		name: "echconfig",
+	}, {
+		svcb: dnssvcb("echconfig", "%BAD%"),
+		want: wantsvcb(nil),
+		name: "echconfig_invalid",
+	}, {
+		svcb: dnssvcb("ipv4hint", "127.0.0.1"),
+		want: wantsvcb(&dns.SVCBIPv4Hint{Hint: []net.IP{ip4}}),
+		name: "ipv4hint",
+	}, {
+		svcb: dnssvcb("ipv4hint", "127.0.01"),
+		want: wantsvcb(nil),
+		name: "ipv4hint_invalid",
+	}, {
+		svcb: dnssvcb("ipv6hint", "::1"),
+		want: wantsvcb(&dns.SVCBIPv6Hint{Hint: []net.IP{ip6}}),
+		name: "ipv6hint",
+	}, {
+		svcb: dnssvcb("ipv6hint", ":::1"),
+		want: wantsvcb(nil),
+		name: "ipv6hint_invalid",
+	}, {
+		svcb: dnssvcb("mandatory", "alpn"),
+		want: wantsvcb(&dns.SVCBMandatory{Code: []dns.SVCBKey{dns.SVCB_ALPN}}),
+		name: "mandatory",
+	}, {
+		svcb: dnssvcb("mandatory", "alpnn"),
+		want: wantsvcb(nil),
+		name: "mandatory_invalid",
+	}, {
+		svcb: dnssvcb("no-default-alpn", ""),
+		want: wantsvcb(&dns.SVCBNoDefaultAlpn{}),
+		name: "no-default-alpn",
+	}, {
+		svcb: dnssvcb("port", "8080"),
+		want: wantsvcb(&dns.SVCBPort{Port: 8080}),
+		name: "port",
+	}, {
+		svcb: dnssvcb("port", "1005008080"),
+		want: wantsvcb(nil),
+		name: "port",
+	}}
+
+	for _, tc := range testCases {
+		t.Run("https", func(t *testing.T) {
+			t.Run(tc.name, func(t *testing.T) {
+				want := &dns.HTTPS{SVCB: *tc.want}
+				want.Hdr.Rrtype = dns.TypeHTTPS
+
+				got := s.genAnswerHTTPS(req, tc.svcb)
+				assert.Equal(t, want, got)
+			})
+		})
+
+		t.Run("svcb", func(t *testing.T) {
+			t.Run(tc.name, func(t *testing.T) {
+				got := s.genAnswerSVCB(req, tc.svcb)
+				assert.Equal(t, tc.want, got)
+			})
+		})
+	}
+}
--- a/internal/home/auth.go
+++ b/internal/home/auth.go
@ -59,10 +59,10 @@ func (s *session) deserialize(data []byte) bool {
 // Auth - global object
 type Auth struct {
 	db         *bbolt.DB
-	sessions   map[string]*session // session name -> session data
-	lock       sync.Mutex
+	sessions   map[string]*session
 	users      []User
-	sessionTTL uint32 // in seconds
+	lock       sync.Mutex
+	sessionTTL uint32
 }

 // User object
@ -223,24 +223,35 @@ func (a *Auth) removeSession(sess []byte) {
 	log.Debug("Auth: removed session from DB")
 }

-// CheckSession - check if session is valid
-// Return 0 if OK;  -1 if session doesn't exist;  1 if session has expired
-func (a *Auth) CheckSession(sess string) int {
+// checkSessionResult is the result of checking a session.
+type checkSessionResult int
+
+// checkSessionResult constants.
+const (
+	checkSessionOK       checkSessionResult = 0
+	checkSessionNotFound checkSessionResult = -1
+	checkSessionExpired  checkSessionResult = 1
+)
+
+// checkSession checks if the session is valid.
+func (a *Auth) checkSession(sess string) (res checkSessionResult) {
 	now := uint32(time.Now().UTC().Unix())
 	update := false

 	a.lock.Lock()
+	defer a.lock.Unlock()
+
 	s, ok := a.sessions[sess]
 	if !ok {
-		a.lock.Unlock()
-		return -1
+		return checkSessionNotFound
 	}
+
 	if s.expire <= now {
 		delete(a.sessions, sess)
 		key, _ := hex.DecodeString(sess)
 		a.removeSession(key)
-		a.lock.Unlock()
-		return 1
+
+		return checkSessionExpired
 	}

 	newExpire := now + a.sessionTTL
@ -250,8 +261,6 @@ func (a *Auth) CheckSession(sess string) int {
 		s.expire = newExpire
 	}

-	a.lock.Unlock()
-
 	if update {
 		key, _ := hex.DecodeString(sess)
 		if a.storeSession(key, s) {
@ -259,7 +268,7 @@ func (a *Auth) CheckSession(sess string) int {
 		}
 	}

-	return 0
+	return checkSessionOK
 }

 // RemoveSession - remove session
@ -392,8 +401,8 @@ func optionalAuthThird(w http.ResponseWriter, r *http.Request) (authFirst bool)
 		ok = true

 	} else if err == nil {
-		r := Context.auth.CheckSession(cookie.Value)
-		if r == 0 {
+		r := Context.auth.checkSession(cookie.Value)
+		if r == checkSessionOK {
 			ok = true
 		} else if r < 0 {
 			log.Debug("Auth: invalid cookie value: %s", cookie)
@ -434,12 +443,13 @@ func optionalAuth(handler func(http.ResponseWriter, *http.Request)) func(http.Re
 			authRequired := Context.auth != nil && Context.auth.AuthRequired()
 			cookie, err := r.Cookie(sessionCookieName)
 			if authRequired && err == nil {
-				r := Context.auth.CheckSession(cookie.Value)
-				if r == 0 {
+				r := Context.auth.checkSession(cookie.Value)
+				if r == checkSessionOK {
 					w.Header().Set("Location", "/")
 					w.WriteHeader(http.StatusFound)
+
 					return
-				} else if r < 0 {
+				} else if r == checkSessionNotFound {
 					log.Debug("Auth: invalid cookie value: %s", cookie)
 				}
 			}
@ -503,32 +513,34 @@ func (a *Auth) UserFind(login, password string) User {
 	return User{}
 }

-// GetCurrentUser - get the current user
-func (a *Auth) GetCurrentUser(r *http.Request) User {
+// getCurrentUser returns the current user.  It returns an empty User if the
+// user is not found.
+func (a *Auth) getCurrentUser(r *http.Request) User {
 	cookie, err := r.Cookie(sessionCookieName)
 	if err != nil {
-		// there's no Cookie, check Basic authentication
+		// There's no Cookie, check Basic authentication.
 		user, pass, ok := r.BasicAuth()
 		if ok {
-			u := Context.auth.UserFind(user, pass)
-			return u
+			return Context.auth.UserFind(user, pass)
 		}
+
 		return User{}
 	}

 	a.lock.Lock()
+	defer a.lock.Unlock()
+
 	s, ok := a.sessions[cookie.Value]
 	if !ok {
-		a.lock.Unlock()
 		return User{}
 	}
+
 	for _, u := range a.users {
 		if u.Name == s.userName {
-			a.lock.Unlock()
 			return u
 		}
 	}
-	a.lock.Unlock()
+
 	return User{}
 }

--- a/internal/home/auth_test.go
+++ b/internal/home/auth_test.go
@ -38,7 +38,7 @@ func TestAuth(t *testing.T) {
 	user := User{Name: "name"}
 	a.UserAdd(&user, "password")

-	assert.True(t, a.CheckSession("notfound") == -1)
+	assert.Equal(t, checkSessionNotFound, a.checkSession("notfound"))
 	a.RemoveSession("notfound")

 	sess, err := getSession(&users[0])
@ -49,13 +49,13 @@ func TestAuth(t *testing.T) {
 	// check expiration
 	s.expire = uint32(now)
 	a.addSession(sess, &s)
-	assert.True(t, a.CheckSession(sessStr) == 1)
+	assert.Equal(t, checkSessionExpired, a.checkSession(sessStr))

 	// add session with TTL = 2 sec
 	s = session{}
 	s.expire = uint32(time.Now().UTC().Unix() + 2)
 	a.addSession(sess, &s)
-	assert.True(t, a.CheckSession(sessStr) == 0)
+	assert.Equal(t, checkSessionOK, a.checkSession(sessStr))

 	a.Close()

@ -63,8 +63,8 @@ func TestAuth(t *testing.T) {
 	a = InitAuth(fn, users, 60)

 	// the session is still alive
-	assert.True(t, a.CheckSession(sessStr) == 0)
-	// reset our expiration time because CheckSession() has just updated it
+	assert.Equal(t, checkSessionOK, a.checkSession(sessStr))
+	// reset our expiration time because checkSession() has just updated it
 	s.expire = uint32(time.Now().UTC().Unix() + 2)
 	a.storeSession(sess, &s)
 	a.Close()
@ -76,7 +76,7 @@ func TestAuth(t *testing.T) {

 	// load and remove expired sessions
 	a = InitAuth(fn, users, 60)
-	assert.True(t, a.CheckSession(sessStr) == -1)
+	assert.Equal(t, checkSessionNotFound, a.checkSession(sessStr))

 	a.Close()
 	os.Remove(fn)
@ -111,7 +111,7 @@ func TestAuthHTTP(t *testing.T) {
 	Context.auth = InitAuth(fn, users, 60)

 	handlerCalled := false
-	handler := func(w http.ResponseWriter, r *http.Request) {
+	handler := func(_ http.ResponseWriter, _ *http.Request) {
 		handlerCalled = true
 	}
 	handler2 := optionalAuth(handler)
--- a/internal/home/control.go
+++ b/internal/home/control.go
@ -89,7 +89,7 @@ type profileJSON struct {

 func handleGetProfile(w http.ResponseWriter, r *http.Request) {
 	pj := profileJSON{}
-	u := Context.auth.GetCurrentUser(r)
+	u := Context.auth.getCurrentUser(r)
 	pj.Name = u.Name

 	data, err := json.Marshal(pj)
--- a/internal/home/controlupdate.go
+++ b/internal/home/controlupdate.go
@ -2,13 +2,14 @@ package home

 import (
 	"encoding/json"
+	"errors"
 	"net/http"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"runtime"
-	"strings"
 	"syscall"
+	"time"

 	"github.com/AdguardTeam/AdGuardHome/internal/sysutil"
 	"github.com/AdguardTeam/AdGuardHome/internal/update"
@ -19,6 +20,13 @@ type getVersionJSONRequest struct {
 	RecheckNow bool `json:"recheck_now"`
 }

+// temporaryError is the interface for temporary errors from the Go standard
+// library.
+type temporaryError interface {
+	error
+	Temporary() (ok bool)
+}
+
 // Get the latest available version from the Internet
 func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
 	if Context.disableUpdate {
@ -41,14 +49,29 @@ func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {

 	var info update.VersionInfo
 	for i := 0; i != 3; i++ {
+		func() {
 			Context.controlLock.Lock()
+			defer Context.controlLock.Unlock()
+
 			info, err = Context.updater.GetVersionResponse(req.RecheckNow)
-		Context.controlLock.Unlock()
-		if err != nil && strings.HasSuffix(err.Error(), "i/o timeout") {
-			// This case may happen while we're restarting DNS server
-			// https://github.com/AdguardTeam/AdGuardHome/internal/issues/934
+		}()
+
+		if err != nil {
+			var terr temporaryError
+			if errors.As(err, &terr) && terr.Temporary() {
+				// Temporary network error.  This case may happen while
+				// we're restarting our DNS server.  Log and sleep for
+				// some time.
+				//
+				// See https://github.com/AdguardTeam/AdGuardHome/issues/934.
+				d := time.Duration(i) * time.Second
+				log.Info("temp net error: %q; sleeping for %s and retrying", err, d)
+				time.Sleep(d)
+
 				continue
 			}
+		}
+
 		break
 	}
 	if err != nil {
--- a/staticcheck.conf
+++ b/staticcheck.conf
@ -7,8 +7,11 @@ initialisms = [
 , "DOQ"
 , "DOT"
 , "EDNS"
+, "MX"
+, "PTR"
 , "QUIC"
 , "SDNS"
+, "SVCB"
 ]
 dot_import_whitelist = []
 http_status_code_whitelist = []