Merge branch 'master' into 3945-log-success

2021-12-22 21:29:31 +03:00 · 2021-12-22 21:29:31 +03:00 · ebe86ce00e
parent d317e19291 39c4999d2d
commit ebe86ce00e
48 changed files with 1069 additions and 559 deletions
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@ -1,7 +1,7 @@
 'name': 'build'
 'env':
-  'GO_VERSION': '1.16'
+  'GO_VERSION': '1.17'
  'NODE_VERSION': '14'
 'on':
@ -103,30 +103,32 @@
    - 'name': 'Run snapshot build'
      'run': 'make SIGN=0 VERBOSE=1 build-release build-docker'
-  'notify':
+  # TODO(a.garipov): Remove once AWS/Slack are back online.
    'needs':
    - 'build-release'
    # Secrets are not passed to workflows that are triggered by a pull request
    # from a fork.
  #
-    # Use always() to signal to the runner that this job must run even if the
+  # 'notify':
-    # previous ones failed.
+  #   'needs':
-    'if':
+  #   - 'build-release'
-      ${{ always() &&
+  #   # Secrets are not passed to workflows that are triggered by a pull request
-        (
+  #   # from a fork.
-          github.event_name == 'push' ||
+  #   #
-          github.event.pull_request.head.repo.full_name == github.repository
+  #   # Use always() to signal to the runner that this job must run even if the
-        )
+  #   # previous ones failed.
-      }}
+  #   'if':
-    'runs-on': 'ubuntu-latest'
+  #     ${{ always() &&
-    'steps':
+  #       (
-    - 'name': 'Conclusion'
+  #         github.event_name == 'push' ||
-      'uses': 'technote-space/workflow-conclusion-action@v1'
+  #         github.event.pull_request.head.repo.full_name == github.repository
-    - 'name': 'Send Slack notif'
+  #       )
-      'uses': '8398a7/action-slack@v3'
+  #     }}
-      'with':
+  #   'runs-on': 'ubuntu-latest'
-        'status': '${{ env.WORKFLOW_CONCLUSION }}'
+  #   'steps':
-        'fields': 'repo, message, commit, author, workflow'
+  #   - 'name': 'Conclusion'
-      'env':
+  #     'uses': 'technote-space/workflow-conclusion-action@v1'
-        'GITHUB_TOKEN': '${{ secrets.GITHUB_TOKEN }}'
+  #   - 'name': 'Send Slack notif'
-        'SLACK_WEBHOOK_URL': '${{ secrets.SLACK_WEBHOOK_URL }}'
+  #     'uses': '8398a7/action-slack@v3'
  #     'with':
  #       'status': '${{ env.WORKFLOW_CONCLUSION }}'
  #       'fields': 'repo, message, commit, author, workflow'
  #     'env':
  #       'GITHUB_TOKEN': '${{ secrets.GITHUB_TOKEN }}'
  #       'SLACK_WEBHOOK_URL': '${{ secrets.SLACK_WEBHOOK_URL }}'
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@ -1,7 +1,7 @@
 'name': 'lint'
 'env':
-  'GO_VERSION': '1.16'
+  'GO_VERSION': '1.17'
 'on':
  'push':
@ -33,31 +33,33 @@
    - 'name': 'Run ESLint'
      'run': 'npm --prefix="./client" run lint'
-  'notify':
+  # TODO(a.garipov): Remove once AWS/Slack are back online.
    'needs':
    - 'go-lint'
    - 'eslint'
    # Secrets are not passed to workflows that are triggered by a pull request
    # from a fork.
  #
-    # Use always() to signal to the runner that this job must run even if the
+  # 'notify':
-    # previous ones failed.
+  #   'needs':
-    'if':
+  #   - 'go-lint'
-      ${{ always() &&
+  #   - 'eslint'
-        (
+  #   # Secrets are not passed to workflows that are triggered by a pull request
-          github.event_name == 'push' ||
+  #   # from a fork.
-          github.event.pull_request.head.repo.full_name == github.repository
+  #   #
-        )
+  #   # Use always() to signal to the runner that this job must run even if the
-      }}
+  #   # previous ones failed.
-    'runs-on': 'ubuntu-latest'
+  #   'if':
-    'steps':
+  #     ${{ always() &&
-    - 'name': 'Conclusion'
+  #       (
-      'uses': 'technote-space/workflow-conclusion-action@v1'
+  #         github.event_name == 'push' ||
-    - 'name': 'Send Slack notif'
+  #         github.event.pull_request.head.repo.full_name == github.repository
-      'uses': '8398a7/action-slack@v3'
+  #       )
-      'with':
+  #     }}
-        'status': '${{ env.WORKFLOW_CONCLUSION }}'
+  #   'runs-on': 'ubuntu-latest'
-        'fields': 'repo, message, commit, author, workflow'
+  #   'steps':
-      'env':
+  #   - 'name': 'Conclusion'
-        'GITHUB_TOKEN': '${{ secrets.GITHUB_TOKEN }}'
+  #     'uses': 'technote-space/workflow-conclusion-action@v1'
-        'SLACK_WEBHOOK_URL': '${{ secrets.SLACK_WEBHOOK_URL }}'
+  #   - 'name': 'Send Slack notif'
  #     'uses': '8398a7/action-slack@v3'
  #     'with':
  #       'status': '${{ env.WORKFLOW_CONCLUSION }}'
  #       'fields': 'repo, message, commit, author, workflow'
  #     'env':
  #       'GITHUB_TOKEN': '${{ secrets.GITHUB_TOKEN }}'
  #       'SLACK_WEBHOOK_URL': '${{ secrets.SLACK_WEBHOOK_URL }}'
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -7,14 +7,38 @@ The format is based on
 and this project adheres to
 [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 ## [Unreleased]
 <!--
-## [v0.107.0] - 2021-11-02 (APPROX.)
+## [v0.108.0] - 2021-06-01 (APPROX.)
 -->
 ### Added
 - `windows/arm64` support ([#3057]).
 ### Deprecated
 <!--
    TODO(a.garipov): Remove this deprecation, if v0.108.0 is released before
    that.
 -->
 - Go 1.17 support.  v0.109.0 will require at least Go 1.18 to build.
 ### Removed
 - Go 1.16 support.
 [#3057]: https://github.com/AdguardTeam/AdGuardHome/issues/3057
 ## [v0.107.0] - 2021-12-21
 ### Added
 - Upstream server information for responses from cache ([#3772]).  Note that old
  log entries concerning cached responses won't include that information.
 - Finnish and Ukrainian translations.
@ -49,6 +73,7 @@ and this project adheres to
 ### Changed
 - Port bindings are now checked for uniqueness ([#3835]).
 - The DNSSEC check now simply checks against the AD flag in the response
  ([#3904]).
 - Client objects in the configuration file are now sorted ([#3933]).
@ -237,10 +262,12 @@ In this release, the schema version has changed from 10 to 12.
 [#3638]: https://github.com/AdguardTeam/AdGuardHome/issues/3638
 [#3655]: https://github.com/AdguardTeam/AdGuardHome/issues/3655
 [#3707]: https://github.com/AdguardTeam/AdGuardHome/issues/3707
 [#3737]: https://github.com/AdguardTeam/AdGuardHome/issues/3737
 [#3744]: https://github.com/AdguardTeam/AdGuardHome/issues/3744
 [#3772]: https://github.com/AdguardTeam/AdGuardHome/issues/3772
 [#3778]: https://github.com/AdguardTeam/AdGuardHome/issues/3778
 [#3815]: https://github.com/AdguardTeam/AdGuardHome/issues/3815
 [#3835]: https://github.com/AdguardTeam/AdGuardHome/issues/3835
 [#3887]: https://github.com/AdguardTeam/AdGuardHome/issues/3887
 [#3890]: https://github.com/AdguardTeam/AdGuardHome/issues/3890
 [#3904]: https://github.com/AdguardTeam/AdGuardHome/issues/3904
@ -608,11 +635,12 @@ In this release, the schema version has changed from 10 to 12.
 <!--
-[Unreleased]: https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.0...HEAD
+[Unreleased]: https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.1...HEAD
-[v0.107.0]:   https://github.com/AdguardTeam/AdGuardHome/compare/v0.106.3...v0.107.0
+[v0.107.1]:   https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.0...v0.107.1
 -->
-[Unreleased]: https://github.com/AdguardTeam/AdGuardHome/compare/v0.106.3...HEAD
+[Unreleased]: https://github.com/AdguardTeam/AdGuardHome/compare/v0.107.0...HEAD
 [v0.107.0]:   https://github.com/AdguardTeam/AdGuardHome/compare/v0.106.3...v0.107.0
 [v0.106.3]:   https://github.com/AdguardTeam/AdGuardHome/compare/v0.106.2...v0.106.3
 [v0.106.2]:   https://github.com/AdguardTeam/AdGuardHome/compare/v0.106.1...v0.106.2
 [v0.106.1]:   https://github.com/AdguardTeam/AdGuardHome/compare/v0.106.0...v0.106.1
--- a/README.md
+++ b/README.md
@ -185,7 +185,7 @@ Run `make init` to prepare the development environment.
 You will need this to build AdGuard Home:
- * [go](https://golang.org/dl/) v1.16 or later.
+ * [go](https://golang.org/dl/) v1.17 or later.
 * [node.js](https://nodejs.org/en/download/) v10.16.2 or later.
 * [npm](https://www.npmjs.com/) v6.14 or later (temporary requirement, TODO: remove when redesign is finished).
 * [yarn](https://yarnpkg.com/) v1.22.5 or later.
--- a/bamboo-specs/release.yaml
+++ b/bamboo-specs/release.yaml
@ -7,7 +7,7 @@
 # Make sure to sync any changes with the branch overrides below.
 'variables':
  'channel': 'edge'
-  'dockerGo': 'adguard/golang-ubuntu:3.8'
+  'dockerGo': 'adguard/golang-ubuntu:4.0'
 'stages':
 - 'Make release':
@ -266,7 +266,7 @@
    # need to build a few of these.
    'variables':
      'channel': 'beta'
-      'dockerGo': 'adguard/golang-ubuntu:3.8'
+      'dockerGo': 'adguard/golang-ubuntu:4.0'
 # release-vX.Y.Z branches are the branches from which the actual final release
 # is built.
 - '^release-v[0-9]+\.[0-9]+\.[0-9]+':
@ -276,4 +276,4 @@
    # are the ones that actually get released.
    'variables':
      'channel': 'release'
-      'dockerGo': 'adguard/golang-ubuntu:3.8'
+      'dockerGo': 'adguard/golang-ubuntu:4.0'
--- a/bamboo-specs/test.yaml
+++ b/bamboo-specs/test.yaml
@ -5,7 +5,7 @@
  'key': 'AHBRTSPECS'
  'name': 'AdGuard Home - Build and run tests'
 'variables':
-  'dockerGo': 'adguard/golang-ubuntu:3.8'
+  'dockerGo': 'adguard/golang-ubuntu:4.0'
 'stages':
 - 'Tests':
--- a/client/src/__locales/en.json
+++ b/client/src/__locales/en.json
@ -163,8 +163,8 @@
    "apply_btn": "Apply",
    "disabled_filtering_toast": "Disabled filtering",
    "enabled_filtering_toast": "Enabled filtering",
-    "disabled_safe_browsing_toast": "Disabled safebrowsing",
+    "disabled_safe_browsing_toast": "Disabled Safe Browsing",
-    "enabled_safe_browsing_toast": "Enabled safebrowsing",
+    "enabled_safe_browsing_toast": "Enabled Safe Browsing",
    "disabled_parental_toast": "Disabled parental control",
    "enabled_parental_toast": "Enabled parental control",
    "disabled_safe_search_toast": "Disabled safe search",
@ -587,8 +587,8 @@
    "show_blocked_responses": "Blocked",
    "show_whitelisted_responses": "Allowed",
    "show_processed_responses": "Processed",
-    "blocked_safebrowsing": "Blocked by Safebrowsing",
+    "blocked_safebrowsing": "Blocked by Safe Browsing",
-    "blocked_adult_websites": "Blocked Adult Websites",
+    "blocked_adult_websites": "Blocked by Parental Control",
    "blocked_threats": "Blocked Threats",
    "allowed": "Allowed",
    "filtered": "Filtered",
@ -625,7 +625,7 @@
    "last_rule_in_allowlist": "Cannot disallow this client because excluding the rule \"{{disallowed_rule}}\" will DISABLE \"Allowed clients\" list.",
    "experimental": "Experimental",
    "use_saved_key": "Use the previously saved key",
-    "parental_control": "Parental control",
+    "parental_control": "Parental Control",
-    "safe_browsing": "Safe browsing",
+    "safe_browsing": "Safe Browsing",
    "served_from_cache": "{{value}} <i>(served from cache)</i>"
 }
--- a/go.mod
+++ b/go.mod
@ -1,42 +1,69 @@
 module github.com/AdguardTeam/AdGuardHome
-go 1.16
+go 1.17
 require (
 	github.com/AdguardTeam/dnsproxy v0.39.13
 	github.com/AdguardTeam/golibs v0.10.3
 	github.com/AdguardTeam/urlfilter v0.15.1
 	github.com/NYTimes/gziphandler v1.1.1
-	github.com/ameshkov/dnscrypt/v2 v2.2.2
+	github.com/ameshkov/dnscrypt/v2 v2.2.3
 	github.com/digineo/go-ipset/v2 v2.2.1
-	github.com/fsnotify/fsnotify v1.4.9
+	github.com/fsnotify/fsnotify v1.5.1
-	github.com/go-ping/ping v0.0.0-20210506233800-ff8be3320020
+	github.com/go-ping/ping v0.0.0-20211130115550-779d1e919534
-	github.com/google/go-cmp v0.5.5
+	github.com/google/go-cmp v0.5.6
 	github.com/google/gopacket v1.1.19
 	github.com/google/renameio v1.0.1
-	github.com/insomniacslk/dhcp v0.0.0-20210310193751-cfd4d47082c2
+	github.com/insomniacslk/dhcp v0.0.0-20211214070828-5297eed8f489
 	github.com/kardianos/service v1.2.0
-	github.com/lucas-clemente/quic-go v0.21.1
+	github.com/lucas-clemente/quic-go v0.24.0
 	github.com/mdlayher/ethernet v0.0.0-20190606142754-0394541c37b7
-	github.com/mdlayher/netlink v1.4.0
+	github.com/mdlayher/netlink v1.5.0
-	github.com/mdlayher/raw v0.0.0-20210412142147-51b895745faf
+	github.com/mdlayher/raw v0.0.0-20211126142749-4eae47f3d54b
 	github.com/miekg/dns v1.1.43
 	github.com/satori/go.uuid v1.2.0
 	github.com/stretchr/testify v1.7.0
 	github.com/ti-mo/netfilter v0.4.0
 	go.etcd.io/bbolt v1.3.6
-	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5
+	golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3
-	golang.org/x/net v0.0.0-20210929193557-e81a3d93ecf6
+	golang.org/x/net v0.0.0-20211216030914-fe4d6282115f
-	golang.org/x/sys v0.0.0-20210909193231-528a39cd75f3
+	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
 	gopkg.in/yaml.v2 v2.4.0
-	howett.net/plist v0.0.0-20201203080718-1454fab16a06
+	howett.net/plist v1.0.0
 )
-require github.com/stretchr/objx v0.1.1 // indirect
+require (
-
+	github.com/BurntSushi/toml v0.4.1 // indirect
-// TODO(e.burkov):  Get rid of the fork in v0.108.0.
+	github.com/aead/chacha20 v0.0.0-20180709150244-8b13a72661da // indirect
-replace github.com/insomniacslk/dhcp => github.com/AdguardTeam/dhcp v0.0.0-20210519141215-51808c73c0bf
+	github.com/aead/poly1305 v0.0.0-20180717145839-3fee0db0b635 // indirect
 	github.com/ameshkov/dnsstamps v1.0.3 // indirect
 	github.com/beefsack/go-rate v0.0.0-20200827232406-6cde80facd47 // indirect
 	github.com/cheekybits/genny v1.0.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/joomcode/errorx v1.0.3 // indirect
 	github.com/josharian/native v0.0.0-20200817173448-b6b71def0850 // indirect
 	github.com/marten-seemann/qtls-go1-16 v0.1.4 // indirect
 	github.com/marten-seemann/qtls-go1-17 v0.1.0 // indirect
 	github.com/mdlayher/socket v0.1.1 // indirect
 	github.com/nxadm/tail v1.4.8 // indirect
 	github.com/onsi/ginkgo v1.16.5 // indirect
 	github.com/patrickmn/go-cache v2.1.0+incompatible // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/stretchr/objx v0.1.1 // indirect
 	github.com/u-root/uio v0.0.0-20210528151154-e40b768296a7 // indirect
 	golang.org/x/mod v0.5.1 // indirect
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
 	golang.org/x/text v0.3.7 // indirect
 	golang.org/x/tools v0.1.8 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776 // indirect
 	honnef.co/go/tools v0.2.2 // indirect
 )
 // TODO(a.garipov): Return to the main repo once miekg/dns#1317 is merged.
 replace github.com/miekg/dns => github.com/ameshkov/dns v1.1.32-0.20211214123418-7a5e0dc5f1b0
--- a/go.sum
+++ b/go.sum
@ -7,8 +7,6 @@ dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0/go.mod h1:JLBr
 dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412/go.mod h1:a1inKt/atXimZ4Mv927x+r7UpyzRUf4emIoiiSC2TN4=
 dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c/go.mod h1:0PRwlb0D6DFvNNtx+9ybjezNCa8XF0xaYcETyp6rHWU=
 git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
 github.com/AdguardTeam/dhcp v0.0.0-20210519141215-51808c73c0bf h1:gc042VRSIRSUzZ+Px6xQCRWNJZTaPkomisDfUZmoFNk=
 github.com/AdguardTeam/dhcp v0.0.0-20210519141215-51808c73c0bf/go.mod h1:TKl4jN3Voofo4UJIicyNhWGp/nlQqQkFxmwIFTvBkKI=
 github.com/AdguardTeam/dnsproxy v0.39.13 h1:7YM5Mr4EpFZ8UO4/4xd6zBG3lZ6AzZO6Xq29Cr4ydOY=
 github.com/AdguardTeam/dnsproxy v0.39.13/go.mod h1:g7zjF1TWpKNeDVh6h3YrjQN8565zsWRd7zo++C/935c=
 github.com/AdguardTeam/golibs v0.4.0/go.mod h1:skKsDKIBB7kkFflLJBpfGX+G8QFTx0WKUzB6TIgtUj4=
@ -19,8 +17,9 @@ github.com/AdguardTeam/golibs v0.10.3/go.mod h1:rSfQRGHIdgfxriDDNgNJ7HmE5zRoURq8
 github.com/AdguardTeam/gomitmproxy v0.2.0/go.mod h1:Qdv0Mktnzer5zpdpi5rAwixNJzW2FN91LjKJCkVbYGU=
 github.com/AdguardTeam/urlfilter v0.15.1 h1:dP6S7J6eFAk8MN4IDpUq2fZoBo8K8fmc6pXpxNIv84M=
 github.com/AdguardTeam/urlfilter v0.15.1/go.mod h1:EwXwrYhowP7bedqmOrmKKmQtpBYFyDNEBFQ+lxdUgQU=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/toml v0.4.1 h1:GaI7EiDXDRfa8VshkTj7Fym7ha+y8/XxIgD2okUIjLw=
 github.com/BurntSushi/toml v0.4.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/NYTimes/gziphandler v1.1.1 h1:ZUDjpQae29j0ryrS0u/B8HZfJBtBQHjqw2rQ2cqUQ3I=
 github.com/NYTimes/gziphandler v1.1.1/go.mod h1:n/CVRwUEOgIxrgPvAQhUUr9oeUtvrhMomdKFjzJNB0c=
 github.com/StackExchange/wmi v1.2.1 h1:VIkavFPXSjcnS+O8yTq7NI32k0R5Aj+v39y29VYDOSA=
@ -31,8 +30,9 @@ github.com/aead/poly1305 v0.0.0-20180717145839-3fee0db0b635 h1:52m0LGchQBBVqJRyY
 github.com/aead/poly1305 v0.0.0-20180717145839-3fee0db0b635/go.mod h1:lmLxL+FV291OopO93Bwf9fQLQeLyt33VJRUg5VJ30us=
 github.com/ameshkov/dns v1.1.32-0.20211214123418-7a5e0dc5f1b0 h1:a6ca3WlDG4zvUWqVFpVu48b9NZJ0fUFlRhiZKKkq+aw=
 github.com/ameshkov/dns v1.1.32-0.20211214123418-7a5e0dc5f1b0/go.mod h1:e3IlAVfNqAllflbibAZEWOXOQ+Ynzk/dDozDxY7XnME=
 github.com/ameshkov/dnscrypt/v2 v2.2.2 h1:lxtS1iSA2EjTOMToSi+2+rwspNA+b/wG5/JpccvE9CU=
 github.com/ameshkov/dnscrypt/v2 v2.2.2/go.mod h1:+8SbPbVXpxxcUsgGi8eodkqWPo1MyNHxKYC8hDpqLSo=
 github.com/ameshkov/dnscrypt/v2 v2.2.3 h1:X9UP5AHtwp46Ji+sGFfF/1Is6OPI/SjxLqhKpx0P5UI=
 github.com/ameshkov/dnscrypt/v2 v2.2.3/go.mod h1:xJB9cE1/GF+NB6EEQqRlkoa4bjcV2w7VYn1G+zVq7Bs=
 github.com/ameshkov/dnsstamps v1.0.1/go.mod h1:Ii3eUu73dx4Vw5O4wjzmT5+lkCwovjzaEZZ4gKyIH5A=
 github.com/ameshkov/dnsstamps v1.0.3 h1:Srzik+J9mivH1alRACTbys2xOxs0lRH9qnTA7Y1OYVo=
 github.com/ameshkov/dnsstamps v1.0.3/go.mod h1:Ii3eUu73dx4Vw5O4wjzmT5+lkCwovjzaEZZ4gKyIH5A=
@ -44,6 +44,8 @@ github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625/go.mod h1:HYsPBT
 github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
 github.com/cheekybits/genny v1.0.0 h1:uGGa4nei+j20rOSeDeP5Of12XVm7TGUd4dJA9RDitfE=
 github.com/cheekybits/genny v1.0.0/go.mod h1:+tQajlRqAUrPI7DOSpB0XAqZYtQakVtB7wXkRAgjxjQ=
 github.com/cilium/ebpf v0.5.0/go.mod h1:4tRaxcgiL706VnOzHOdBlY8IEAIdxINsQBcU4xJJXRs=
 github.com/cilium/ebpf v0.7.0/go.mod h1:/oI2+1shJiTGAMgl6/RgJr36Eo1jzrRcAWbcXO2usCA=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/coreos/go-systemd v0.0.0-20181012123002-c6f51f82210d/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
@ -56,16 +58,20 @@ github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25Kn
 github.com/fanliao/go-promise v0.0.0-20141029170127-1890db352a72/go.mod h1:PjfxuH4FZdUyfMdtBio2lsRr1AKEaVPwelzuHuh8Lqc=
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-github.com/go-ping/ping v0.0.0-20210506233800-ff8be3320020 h1:mdi6AbCEoKCA1xKCmp7UtRB5fvGFlP92PvlhxgdvXEw=
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-github.com/go-ping/ping v0.0.0-20210506233800-ff8be3320020/go.mod h1:KmHOjTUmJh/l04ukqPoBWPEZr9jwN05h5NXQl5C+DyY=
+github.com/go-ping/ping v0.0.0-20211130115550-779d1e919534/go.mod h1:xIFjORFzTxqIV/tDVGO4eDy/bLuSyawEeojSm3GfRGk=
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 github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0/go.mod h1:fyg7847qk6SyHyPtNmDHnmrv/HOrqktSC+C9fM+CJOE=
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@ -83,6 +89,9 @@ github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrU
 github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
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@ -90,8 +99,9 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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@ -100,6 +110,9 @@ github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXi
 github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
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@ -108,6 +121,8 @@ github.com/grpc-ecosystem/grpc-gateway v1.5.0/go.mod h1:RSKVYQBd5MCa4OVpNdGskqpg
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 github.com/insomniacslk/dhcp v0.0.0-20211214070828-5297eed8f489/go.mod h1:h+MxyHxRg9NH3terB1nfRIUaQEcI0XOVkdR9LNBlp8E=
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@ -121,8 +136,10 @@ github.com/jsimonetti/rtnetlink v0.0.0-20201110080708-d2c240429e6c/go.mod h1:huN
 github.com/jsimonetti/rtnetlink v0.0.0-20201216134343-bde56ed16391/go.mod h1:cR77jAZG3Y3bsb8hF6fHJbFoyFukLFOkQ98S0pQz3xw=
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 github.com/jsimonetti/rtnetlink v0.0.0-20211022192332-93da33804786/go.mod h1:v4hqbTdfQngbVSZJVWUhGE/lbTFf9jb+ygmNUDQMuOs=
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 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
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@ -130,27 +147,31 @@ github.com/kardianos/service v1.2.0 h1:bGuZ/epo3vrt8IPC7mnKQolqFeYJb7Cs8Rk4PSOBB
 github.com/kardianos/service v1.2.0/go.mod h1:CIMRFEJVL+0DS1a3Nx06NaMn4Dz63Ng6O7dl0qH0zVM=
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-github.com/marten-seemann/qtls-go1-17 v0.1.0-beta.1.2 h1:SficYjyOthSrliKI+EaFuXS6HqSsX3dkY9AqxAAjBjw=
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 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
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@ -163,12 +184,19 @@ github.com/mdlayher/netlink v1.2.0/go.mod h1:kwVW1io0AZy9A1E2YYgaD4Cj+C+GPkU6klX
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 github.com/mdlayher/socket v0.0.0-20210307095302-262dc9984e00/go.mod h1:GAFlyu4/XV68LkQKYzKhIo/WW7j3Zi0YRAz/BOoanUc=
 github.com/mdlayher/socket v0.0.0-20211007213009-516dcbdf0267/go.mod h1:nFZ1EtZYK8Gi/k6QNu7z7CgO20i/4ExeQswwWuPmG/g=
 github.com/mdlayher/socket v0.1.0/go.mod h1:mYV5YIZAfHh4dzDVzI8x8tWLWCliuX8Mon5Awbj+qDs=
 github.com/mdlayher/socket v0.1.1 h1:q3uOGirUPfAV2MUoaC7BavjQ154J7+JOkTWyiV+intI=
 github.com/mdlayher/socket v0.1.1/go.mod h1:mYV5YIZAfHh4dzDVzI8x8tWLWCliuX8Mon5Awbj+qDs=
 github.com/microcosm-cc/bluemonday v1.0.1/go.mod h1:hsXNsILzKxV+sX77C5b8FSuKF00vh2OMYv+xgHpAMF4=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
@ -176,15 +204,20 @@ github.com/neelance/astrewrite v0.0.0-20160511093645-99348263ae86/go.mod h1:kHJE
 github.com/neelance/sourcemap v0.0.0-20151028013722-8c68805598ab/go.mod h1:Qr6/a/Q4r9LP1IltGz7tA7iOK1WonHEYhu1HRBA7ZiM=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
 github.com/nxadm/tail v1.4.4 h1:DQuhQpB1tVlglWS2hLQ5OV6B5r8aGxSrPc5Qo6uTN78=
 github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
 github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
 github.com/nxadm/tail v1.4.8/go.mod h1:+ncqLTQzXmGhMZNUePPaPqPvBxHAIsmXswZKocGu+AU=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/ginkgo v1.12.1/go.mod h1:zj2OWP4+oCPe1qIXoGWkgMRwljMUYCdkwsT2108oapk=
 github.com/onsi/ginkgo v1.14.0 h1:2mOpI4JVVPBN+WQRa0WKH2eXR+Ey+uK4n7Zj0aYpIQA=
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 github.com/onsi/ginkgo v1.16.5/go.mod h1:+E8gABHa3K6zRBolWtd+ROzc/U5bkGt0FwiG042wbpU=
 github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7JYyY=
 github.com/onsi/gomega v1.10.1 h1:o0+MgICZLuZ7xjH7Vx6zS/zcu93/BEp1VwkIW1mEXCE=
 github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
 github.com/onsi/gomega v1.13.0 h1:7lLHu94wT9Ij0o6EWWclhu0aOh32VxhkwEJvzuWPeak=
 github.com/onsi/gomega v1.13.0/go.mod h1:lRk9szgn8TxENtWd0Tp4c3wjlRfMTMH27I+3Je41yGY=
 github.com/openzipkin/zipkin-go v0.1.1/go.mod h1:NtoC/o8u3JlF1lSlyPNswIbeQH9bJTmOf0Erfk+hxe8=
 github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaRUnok+kx1WdO15EQc=
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
@ -246,11 +279,15 @@ github.com/tklauser/go-sysconf v0.3.9 h1:JeUVdAOWhhxVcU6Eqr/ATFHgXk/mmiItdKeJPev
 github.com/tklauser/go-sysconf v0.3.9/go.mod h1:11DU/5sG7UexIrp/O6g35hrWzu0JxlwQ3LSFUzyeuhs=
 github.com/tklauser/numcpus v0.3.0 h1:ILuRUQBtssgnxw0XXIjKUC56fgnOrFoQQ/4+DeU2biQ=
 github.com/tklauser/numcpus v0.3.0/go.mod h1:yFGUr7TUHQRAhyqBcEg0Ge34zDBAsIvJJcyE6boqnA8=
-github.com/u-root/u-root v7.0.0+incompatible h1:u+KSS04pSxJGI5E7WE4Bs9+Zd75QjFv+REkjy/aoAc8=
+github.com/u-root/uio v0.0.0-20210528114334-82958018845c/go.mod h1:LpEX5FO/cB+WF4TYGY1V5qktpaZLkKkSegbr0V4eYXA=
-github.com/u-root/u-root v7.0.0+incompatible/go.mod h1:RYkpo8pTHrNjW08opNd/U6p/RJE7K0D8fXO0d47+3YY=
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 github.com/u-root/uio v0.0.0-20210528151154-e40b768296a7/go.mod h1:LpEX5FO/cB+WF4TYGY1V5qktpaZLkKkSegbr0V4eYXA=
 github.com/viant/assertly v0.4.8/go.mod h1:aGifi++jvCrUaklKEKT0BU95igDNaqkvz+49uaYMPRU=
 github.com/viant/toolbox v0.24.0/go.mod h1:OxMCG57V0PXuIP2HNQrtJf2CjqdmbrOx5EkMILuUhzM=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.etcd.io/bbolt v1.3.6 h1:/ecaJf0sk1l4l6V4awd65v2C3ILy7MSj+s/x1ADCIMU=
 go.etcd.io/bbolt v1.3.6/go.mod h1:qXsaaIqmgQH0T+OPdb99Bf+PKfBBQVAdyD6TY9G8XM4=
 go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
@ -264,16 +301,18 @@ golang.org/x/crypto v0.0.0-20200221231518-2aa609cf4a9d/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20201208171446-5f87f3452ae9/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
-golang.org/x/crypto v0.0.0-20210817164053-32db794688a5 h1:HWj/xjIHfjYU5nVXpTM0s39J9CbLn7Cc5a7IC5rwsMQ=
+golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3 h1:0es+/5331RGQPcXlMfP+WrnIIS6dNnNRe0WB02W0F4M=
-golang.org/x/crypto v0.0.0-20210817164053-32db794688a5/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.0.0-20211215153901-e495a2d5b3d3/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
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-golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
+golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
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@ -293,19 +332,29 @@ golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200904194848-62affa334b73/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201010224723-4f7140c49acb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201016165138-7b1cca2348c0/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
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-golang.org/x/net v0.0.0-20210929193557-e81a3d93ecf6 h1:Z04ewVs7JhXaYkmDhBERPi41gnltfQpMWDnTnQbaCqk=
+golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20210929193557-e81a3d93ecf6/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
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 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211209124913-491a49abca63/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211216030914-fe4d6282115f h1:hEYJvxw1lSnWIl8X9ofsYMklzaDs90JI2az5YMd4fPM=
 golang.org/x/net v0.0.0-20211216030914-fe4d6282115f/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20181017192945-9dcd33a902f4/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20181203162652-d668ce993890/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@ -316,6 +365,7 @@ golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cOontH8FOep7tGV86Y7SQ=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@ -347,22 +397,33 @@ golang.org/x/sys v0.0.0-20201009025420-dfb3f7c4e634/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20201015000850-e3ed0017c211/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201017003518-b09fb700fbb7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201101102859-da207088b7d1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201112073958-5cba982894dd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201118182958-a01c418693c7/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201218084310-7d0127a74742/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210110051926-789bb1bd4061/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210123111255-9b0068b26619/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210216163648-f7da38b97c65/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210305230114-8fe3ee5dd75b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210315160823-c6e025ad8005/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210816074244-15123e1e1f71/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210909193231-528a39cd75f3 h1:3Ad41xy2WCESpufXwgs7NpDSu+vjxqLt2UFqUV+20bI=
+golang.org/x/sys v0.0.0-20210906170528-6f6e22806c34/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210909193231-528a39cd75f3/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211019181941-9d821ace8654/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211025201205-69cdffdb9359/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211210111614-af8b64212486/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e h1:fLOSk5Q00efkSvAm+4xcoXD+RRmLmmulPn5I3Y9F2EM=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@ -383,9 +444,13 @@ golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3
 golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
 golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.6-0.20210726203631-07bc1bf47fb2 h1:BonxutuHCTL0rBDnZlKjpGIQFTjyUVTexFOdWkB6Fg0=
 golang.org/x/tools v0.1.6-0.20210726203631-07bc1bf47fb2/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo=
 golang.org/x/tools v0.1.8 h1:P1HhGGuLW4aAclzjtmJdf0mJOjVUZUzOTqkAkWL+l6w=
 golang.org/x/tools v0.1.8/go.mod h1:nABZi5QlRsZVlzPpHl034qft6wpY4eDcsTt5AaioBiU=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@ -413,6 +478,9 @@ google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQ
 google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
 google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
@ -423,6 +491,7 @@ gopkg.in/natefinch/lumberjack.v2 v2.0.0 h1:1Lc07Kr7qY4U2YPouBjpCLxpiyxIVoxqXgkXL
 gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v1 v1.0.0-20140924161607-9f9df34309c0/go.mod h1:WDnlLJ4WF5VGsH/HVa3CI79GS0ol3YnhVnKP89i0kNg=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
@ -437,7 +506,10 @@ grpc.go4.org v0.0.0-20170609214715-11d0a25b4919/go.mod h1:77eQGdRu53HpSqPFJFmuJd
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-howett.net/plist v0.0.0-20201203080718-1454fab16a06 h1:QDxUo/w2COstK1wIBYpzQlHX/NqaQTcf9jyz347nI58=
+honnef.co/go/tools v0.2.1/go.mod h1:lPVVZ2BS5TfnjLyizF7o7hv7j9/L+8cZY2hLyjP9cGY=
-howett.net/plist v0.0.0-20201203080718-1454fab16a06/go.mod h1:vMygbs4qMhSZSc4lCUl2OEE+rDiIIJAIdR4m7MiMcm0=
+honnef.co/go/tools v0.2.2 h1:MNh1AVMyVX23VUHE2O27jm6lNj3vjO5DexS4A1xvnzk=
 honnef.co/go/tools v0.2.2/go.mod h1:lPVVZ2BS5TfnjLyizF7o7hv7j9/L+8cZY2hLyjP9cGY=
 howett.net/plist v1.0.0 h1:7CrbWYbPPO/PyNy38b2EB/+gYbjCe2DXBxgtOOZbSQM=
 howett.net/plist v1.0.0/go.mod h1:lqaXoTrLY4hg8tnEzNru53gicrbv7rrk+2xJA/7hw9g=
 sourcegraph.com/sourcegraph/go-diff v0.5.0/go.mod h1:kuch7UrkMzY0X+p9CRK03kfuPQ2zzQcaEFbx8wA8rck=
 sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=
--- a/internal/aghhttp/aghhttp.go
+++ b/internal/aghhttp/aghhttp.go
@ -0,0 +1,24 @@
 // Package aghhttp provides some common methods to work with HTTP.
 package aghhttp
 import (
 	"fmt"
 	"io"
 	"net/http"
 	"github.com/AdguardTeam/golibs/log"
 )
 // OK responds with word OK.
 func OK(w http.ResponseWriter) {
 	if _, err := io.WriteString(w, "OK\n"); err != nil {
 		log.Error("couldn't write body: %s", err)
 	}
 }
 // Error writes formatted message to w and also logs it.
 func Error(r *http.Request, w http.ResponseWriter, code int, format string, args ...interface{}) {
 	text := fmt.Sprintf(format, args...)
 	log.Error("%s %s: %s", r.Method, r.URL, text)
 	http.Error(w, text, code)
 }
--- a/internal/aghnet/hostscontainer.go
+++ b/internal/aghnet/hostscontainer.go
@ -100,16 +100,16 @@ const hostsContainerPref = "hosts container"
 type HostsContainer struct {
 	// requestMatcher matches the requests and translates the rules.  It's
 	// embedded to implement MatchRequest and Translate for *HostsContainer.
 	//
 	// TODO(a.garipov, e.burkov): Consider fully merging into HostsContainer.
 	requestMatcher
 	// listID is the identifier for the list of generated rules.
 	listID int
 	// done is the channel to sign closing the container.
 	done chan struct{}
 	// updates is the channel for receiving updated hosts.
 	updates chan *netutil.IPMap
 	// last is the set of hosts that was cached within last detected change.
 	last *netutil.IPMap
@ -118,8 +118,12 @@ type HostsContainer struct {
 	// w tracks the changes in specified files and directories.
 	w aghos.FSWatcher
 	// patterns stores specified paths in the fs.Glob-compatible form.
 	patterns []string
 	// listID is the identifier for the list of generated rules.
 	listID int
 }
 // ErrNoHostsPaths is returned when there are no valid paths to watch passed to
@ -288,7 +292,7 @@ func (hp *hostsParser) parseFile(
 	s := bufio.NewScanner(r)
 	for s.Scan() {
 		ip, hosts := hp.parseLine(s.Text())
-		if ip == nil {
+		if ip == nil || len(hosts) == 0 {
 			continue
 		}
@ -310,21 +314,26 @@ func (hp *hostsParser) parseLine(line string) (ip net.IP, hosts []string) {
 	}
 	for _, f := range fields[1:] {
-		switch hashIdx := strings.IndexByte(f, '#'); hashIdx {
+		hashIdx := strings.IndexByte(f, '#')
-		case -1:
+		if hashIdx == 0 {
-			hosts = append(hosts, f)
+			// The rest of the fields are a part of the comment so return.
-
+			break
-			continue
+		} else if hashIdx > 0 {
 		case 0:
 			// Go on.
 		default:
 			// Only a part of the field is a comment.
-			hosts = append(hosts, f[:hashIdx])
+			f = f[:hashIdx]
 		}
-		// The rest of the fields are a part of the comment so skip
+		// Make sure that invalid hosts aren't turned into rules.
-		// immediately.
+		//
-		break
+		// See https://github.com/AdguardTeam/AdGuardHome/issues/3946.
 		err := netutil.ValidateDomainName(f)
 		if err != nil {
 			log.Error("%s: host %q is invalid, ignoring", hostsContainerPref, f)
 			continue
 		}
 		hosts = append(hosts, f)
 	}
 	return ip, hosts
@ -422,7 +431,7 @@ func (hp *hostsParser) writeMainHostRule(host string, ip net.IP) (added, addedPt
 		rwSuccess    = "^$dnsrewrite=NOERROR;"
 		rwSuccessPTR = "^$dnsrewrite=NOERROR;PTR;"
-		modLen    = len("||") + len(rwSuccess)
+		modLen    = len("||") + len(rwSuccess) + len(";")
 		modLenPTR = len("||") + len(rwSuccessPTR)
 	)
--- a/internal/aghnet/interfaces.go
+++ b/internal/aghnet/interfaces.go
@ -118,3 +118,11 @@ func IfaceDNSIPAddrs(
 	return addrs, nil
 }
 // interfaceName is a string containing network interface's name.  The name is
 // used in file walking methods.
 type interfaceName string
 // Use interfaceName in the OS-independent code since it's actually only used in
 // several OS-dependent implementations which causes linting issues.
 var _ = interfaceName("")
--- a/internal/aghnet/net.go
+++ b/internal/aghnet/net.go
@ -4,13 +4,11 @@ package aghnet
 import (
 	"encoding/json"
 	"fmt"
 	"io"
 	"net"
 	"os"
 	"os/exec"
 	"runtime"
 	"strings"
 	"syscall"
 	"time"
 	"github.com/AdguardTeam/golibs/errors"
 	"github.com/AdguardTeam/golibs/log"
@ -189,57 +187,30 @@ func GetSubnet(ifaceName string) *net.IPNet {
 	return nil
 }
-// CheckPortAvailable - check if TCP port is available
+// CheckPort checks if the port is available for binding.
-func CheckPortAvailable(host net.IP, port int) error {
+func CheckPort(network string, ip net.IP, port int) (err error) {
-	ln, err := net.Listen("tcp", netutil.JoinHostPort(host.String(), port))
+	var c io.Closer
-	if err != nil {
+	addr := netutil.IPPort{IP: ip, Port: port}.String()
-		return err
+	switch network {
-	}
+	case "tcp":
-	_ = ln.Close()
+		c, err = net.Listen(network, addr)
-
+	case "udp":
-	// It seems that net.Listener.Close() doesn't close file descriptors right away.
+		c, err = net.ListenPacket(network, addr)
-	// We wait for some time and hope that this fd will be closed.
+	default:
 	time.Sleep(100 * time.Millisecond)
 		return nil
 	}
-// CheckPacketPortAvailable - check if UDP port is available
+	return errors.WithDeferred(err, closePortChecker(c))
 func CheckPacketPortAvailable(host net.IP, port int) error {
 	ln, err := net.ListenPacket("udp", netutil.JoinHostPort(host.String(), port))
 	if err != nil {
 		return err
 	}
 	_ = ln.Close()
 	// It seems that net.Listener.Close() doesn't close file descriptors right away.
 	// We wait for some time and hope that this fd will be closed.
 	time.Sleep(100 * time.Millisecond)
 	return err
 }
-// ErrorIsAddrInUse - check if error is "address already in use"
+// IsAddrInUse checks if err is about unsuccessful address binding.
-func ErrorIsAddrInUse(err error) bool {
+func IsAddrInUse(err error) (ok bool) {
-	errOpError, ok := err.(*net.OpError)
+	var sysErr syscall.Errno
-	if !ok {
+	if !errors.As(err, &sysErr) {
 		return false
 	}
-	errSyscallError, ok := errOpError.Err.(*os.SyscallError)
+	return isAddrInUse(sysErr)
 	if !ok {
 		return false
 	}
 	errErrno, ok := errSyscallError.Err.(syscall.Errno)
 	if !ok {
 		return false
 	}
 	if runtime.GOOS == "windows" {
 		const WSAEADDRINUSE = 10048
 		return errErrno == WSAEADDRINUSE
 	}
 	return errErrno == syscall.EADDRINUSE
 }
 // SplitHost is a wrapper for net.SplitHostPort for the cases when the hostport
--- a/internal/aghnet/net_others.go
+++ b/internal/aghnet/net_others.go
@ -1,20 +0,0 @@
 //go:build !(linux || darwin || freebsd || openbsd)
 // +build !linux,!darwin,!freebsd,!openbsd
 package aghnet
 import (
 	"github.com/AdguardTeam/AdGuardHome/internal/aghos"
 )
 func canBindPrivilegedPorts() (can bool, err error) {
 	return aghos.HaveAdminRights()
 }
 func ifaceHasStaticIP(string) (ok bool, err error) {
 	return false, aghos.Unsupported("checking static ip")
 }
 func ifaceSetStaticIP(string) (err error) {
 	return aghos.Unsupported("setting static ip")
 }
--- a/internal/aghnet/net_unix.go
+++ b/internal/aghnet/net_unix.go
@ -1,8 +1,19 @@
-//go:build openbsd || freebsd || linux
+//go:build openbsd || freebsd || linux || darwin
-// +build openbsd freebsd linux
+// +build openbsd freebsd linux darwin
 package aghnet
-// interfaceName is a string containing network interface's name.  The name is
+import (
-// used in file walking methods.
+	"io"
-type interfaceName string
+	"syscall"
 	"github.com/AdguardTeam/golibs/errors"
 )
 func closePortChecker(c io.Closer) (err error) {
 	return c.Close()
 }
 func isAddrInUse(err syscall.Errno) (ok bool) {
 	return errors.Is(err, syscall.EADDRINUSE)
 }
--- a/internal/aghnet/net_windows.go
+++ b/internal/aghnet/net_windows.go
@ -0,0 +1,45 @@
 //go:build !(linux || darwin || freebsd || openbsd)
 // +build !linux,!darwin,!freebsd,!openbsd
 package aghnet
 import (
 	"io"
 	"syscall"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghos"
 	"github.com/AdguardTeam/golibs/errors"
 	"golang.org/x/sys/windows"
 )
 func canBindPrivilegedPorts() (can bool, err error) {
 	return aghos.HaveAdminRights()
 }
 func ifaceHasStaticIP(string) (ok bool, err error) {
 	return false, aghos.Unsupported("checking static ip")
 }
 func ifaceSetStaticIP(string) (err error) {
 	return aghos.Unsupported("setting static ip")
 }
 func closePortChecker(c io.Closer) (err error) {
 	if err = c.Close(); err != nil {
 		return err
 	}
 	// It seems that net.Listener.Close() doesn't close file descriptors right
 	// away.  We wait for some time and hope that this fd will be closed.
 	//
 	// TODO(e.burkov):  Investigate the purpose of the line and perhaps use more
 	// reliable approach.
 	time.Sleep(100 * time.Millisecond)
 	return nil
 }
 func isAddrInUse(err syscall.Errno) (ok bool) {
 	return errors.Is(err, windows.WSAEADDRINUSE)
 }
--- a/internal/aghnet/testdata/etc_hosts
+++ b/internal/aghnet/testdata/etc_hosts
@ -8,7 +8,13 @@
 # See https://github.com/AdguardTeam/AdGuardHome/issues/3846.
 1.0.0.2 a.whole lot.of aliases for.testing
 # See https://github.com/AdguardTeam/AdGuardHome/issues/3946.
 1.0.0.3 *
 1.0.0.4 *.com
 # Same for IPv6.
 ::1 simplehost
 ::  hello hello.world
 ::2 a.whole lot.of aliases for.testing
 ::3 *
 ::4 *.com
--- a/internal/dhcpd/http.go
+++ b/internal/dhcpd/http.go
@ -10,18 +10,13 @@ import (
 	"strings"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
 	"github.com/AdguardTeam/golibs/errors"
 	"github.com/AdguardTeam/golibs/log"
 	"github.com/AdguardTeam/golibs/timeutil"
 )
 func httpError(r *http.Request, w http.ResponseWriter, code int, format string, args ...interface{}) {
 	text := fmt.Sprintf(format, args...)
 	log.Info("DHCP: %s %s: %s", r.Method, r.URL, text)
 	http.Error(w, text, code)
 }
 type v4ServerConfJSON struct {
 	GatewayIP     net.IP `json:"gateway_ip"`
 	SubnetMask    net.IP `json:"subnet_mask"`
@ -87,8 +82,13 @@ func (s *Server) handleDHCPStatus(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
 	err := json.NewEncoder(w).Encode(status)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "Unable to marshal DHCP status json: %s", err)
+		aghhttp.Error(
-		return
+			r,
 			w,
 			http.StatusInternalServerError,
 			"Unable to marshal DHCP status json: %s",
 			err,
 		)
 	}
 }
@ -211,36 +211,34 @@ func (s *Server) handleDHCPSetConfig(w http.ResponseWriter, r *http.Request) {
 	err := json.NewDecoder(r.Body).Decode(conf)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest,
+		aghhttp.Error(r, w, http.StatusBadRequest, "failed to parse new dhcp config json: %s", err)
 			"failed to parse new dhcp config json: %s", err)
 		return
 	}
 	srv4, v4Enabled, err := s.handleDHCPSetConfigV4(conf)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "bad dhcpv4 configuration: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "bad dhcpv4 configuration: %s", err)
 		return
 	}
 	srv6, v6Enabled, err := s.handleDHCPSetConfigV6(conf)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "bad dhcpv6 configuration: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "bad dhcpv6 configuration: %s", err)
 		return
 	}
 	if conf.Enabled == nbTrue && !v4Enabled && !v6Enabled {
-		httpError(r, w, http.StatusBadRequest,
+		aghhttp.Error(r, w, http.StatusBadRequest, "dhcpv4 or dhcpv6 configuration must be complete")
 			"dhcpv4 or dhcpv6 configuration must be complete")
 		return
 	}
 	err = s.Stop()
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "stopping dhcp: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "stopping dhcp: %s", err)
 		return
 	}
@ -265,7 +263,7 @@ func (s *Server) handleDHCPSetConfig(w http.ResponseWriter, r *http.Request) {
 	err = s.dbLoad()
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "loading leases db: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "loading leases db: %s", err)
 		return
 	}
@ -274,9 +272,7 @@ func (s *Server) handleDHCPSetConfig(w http.ResponseWriter, r *http.Request) {
 		var code int
 		code, err = s.enableDHCP(conf.InterfaceName)
 		if err != nil {
-			httpError(r, w, code, "enabling dhcp: %s", err)
+			aghhttp.Error(r, w, code, "enabling dhcp: %s", err)
 			return
 		}
 	}
 }
@ -295,7 +291,8 @@ func (s *Server) handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
 	ifaces, err := net.Interfaces()
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "Couldn't get interfaces: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't get interfaces: %s", err)
 		return
 	}
@ -312,7 +309,15 @@ func (s *Server) handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
 		var addrs []net.Addr
 		addrs, err = iface.Addrs()
 		if err != nil {
-			httpError(r, w, http.StatusInternalServerError, "Failed to get addresses for interface %s: %s", iface.Name, err)
+			aghhttp.Error(
 				r,
 				w,
 				http.StatusInternalServerError,
 				"Failed to get addresses for interface %s: %s",
 				iface.Name,
 				err,
 			)
 			return
 		}
@ -329,7 +334,13 @@ func (s *Server) handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
 			ipnet, ok := addr.(*net.IPNet)
 			if !ok {
 				// not an IPNet, should not happen
-				httpError(r, w, http.StatusInternalServerError, "SHOULD NOT HAPPEN: got iface.Addrs() element %s that is not net.IPNet, it is %T", addr, addr)
+				aghhttp.Error(
 					r,
 					w,
 					http.StatusInternalServerError,
 					"got iface.Addrs() element %[1]s that is not net.IPNet, it is %[1]T",
 					addr)
 				return
 			}
 			// ignore link-local
@ -350,8 +361,13 @@ func (s *Server) handleDHCPInterfaces(w http.ResponseWriter, r *http.Request) {
 	err = json.NewEncoder(w).Encode(response)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "Failed to marshal json with available interfaces: %s", err)
+		aghhttp.Error(
-		return
+			r,
 			w,
 			http.StatusInternalServerError,
 			"Failed to marshal json with available interfaces: %s",
 			err,
 		)
 	}
 }
@ -455,9 +471,13 @@ func (s *Server) handleDHCPFindActiveServer(w http.ResponseWriter, r *http.Reque
 	w.Header().Set("Content-Type", "application/json")
 	err = json.NewEncoder(w).Encode(result)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "Failed to marshal DHCP found json: %s", err)
+		aghhttp.Error(
-
+			r,
-		return
+			w,
 			http.StatusInternalServerError,
 			"Failed to marshal DHCP found json: %s",
 			err,
 		)
 	}
 }
@ -465,13 +485,13 @@ func (s *Server) handleDHCPAddStaticLease(w http.ResponseWriter, r *http.Request
 	l := &Lease{}
 	err := json.NewDecoder(r.Body).Decode(l)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "json.Decode: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "json.Decode: %s", err)
 		return
 	}
 	if l.IP == nil {
-		httpError(r, w, http.StatusBadRequest, "invalid IP")
+		aghhttp.Error(r, w, http.StatusBadRequest, "invalid IP")
 		return
 	}
@ -483,7 +503,7 @@ func (s *Server) handleDHCPAddStaticLease(w http.ResponseWriter, r *http.Request
 		err = s.srv6.AddStaticLease(l)
 		if err != nil {
-			httpError(r, w, http.StatusBadRequest, "%s", err)
+			aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 		}
 		return
@ -492,7 +512,7 @@ func (s *Server) handleDHCPAddStaticLease(w http.ResponseWriter, r *http.Request
 	l.IP = ip4
 	err = s.srv4.AddStaticLease(l)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "%s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 		return
 	}
@ -502,13 +522,13 @@ func (s *Server) handleDHCPRemoveStaticLease(w http.ResponseWriter, r *http.Requ
 	l := &Lease{}
 	err := json.NewDecoder(r.Body).Decode(l)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "json.Decode: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "json.Decode: %s", err)
 		return
 	}
 	if l.IP == nil {
-		httpError(r, w, http.StatusBadRequest, "invalid IP")
+		aghhttp.Error(r, w, http.StatusBadRequest, "invalid IP")
 		return
 	}
@ -520,7 +540,7 @@ func (s *Server) handleDHCPRemoveStaticLease(w http.ResponseWriter, r *http.Requ
 		err = s.srv6.RemoveStaticLease(l)
 		if err != nil {
-			httpError(r, w, http.StatusBadRequest, "%s", err)
+			aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 		}
 		return
@ -529,7 +549,7 @@ func (s *Server) handleDHCPRemoveStaticLease(w http.ResponseWriter, r *http.Requ
 	l.IP = ip4
 	err = s.srv4.RemoveStaticLease(l)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "%s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 		return
 	}
@ -545,7 +565,7 @@ const (
 func (s *Server) handleReset(w http.ResponseWriter, r *http.Request) {
 	err := s.Stop()
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "stopping dhcp: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "stopping dhcp: %s", err)
 		return
 	}
@ -583,7 +603,7 @@ func (s *Server) handleResetLeases(w http.ResponseWriter, r *http.Request) {
 	err := s.resetLeases()
 	if err != nil {
 		msg := "resetting leases: %s"
-		httpError(r, w, http.StatusInternalServerError, msg, err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, msg, err)
 		return
 	}
--- a/internal/dhcpd/options_unix.go
+++ b/internal/dhcpd/options_unix.go
@ -130,21 +130,19 @@ func parseDHCPOption(s string) (opt dhcpv4.Option, err error) {
 // prepareOptions builds the set of DHCP options according to host requirements
 // document and values from conf.
 func prepareOptions(conf V4ServerConf) (opts dhcpv4.Options) {
-	opts = dhcpv4.Options{
+	// Set default values for host configuration parameters listed in Appendix
-		// Set default values for host configuration parameters listed
+	// A of RFC-2131.  Those parameters, if requested by client, should be
-		// in Appendix A of RFC-2131.  Those parameters, if requested by
+	// returned with values defined by Host Requirements Document.
 		// client, should be returned with values defined by Host
 		// Requirements Document.
 	//
 	// See https://datatracker.ietf.org/doc/html/rfc2131#appendix-A.
 	//
 	// See also https://datatracker.ietf.org/doc/html/rfc1122,
 	// https://datatracker.ietf.org/doc/html/rfc1123, and
 	// https://datatracker.ietf.org/doc/html/rfc2132.
-
+	opts = dhcpv4.Options{
 		// IP-Layer Per Host
 		dhcpv4.OptionNonLocalSourceRouting.Code(): []byte{0},
 		// Set the current recommended default time to live for the
 		// Internet Protocol which is 64, see
 		// https://datatracker.ietf.org/doc/html/rfc1700.
--- a/internal/dhcpd/server.go
+++ b/internal/dhcpd/server.go
@ -27,7 +27,6 @@ type DHCPServer interface {
 	Start() (err error)
 	// Stop - stop server
 	Stop() (err error)
 	getLeasesRef() []*Lease
 }
--- a/internal/dnsforward/access.go
+++ b/internal/dnsforward/access.go
@ -7,6 +7,7 @@ import (
 	"net/http"
 	"strings"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/golibs/errors"
 	"github.com/AdguardTeam/golibs/log"
 	"github.com/AdguardTeam/golibs/netutil"
@ -187,7 +188,7 @@ func (s *Server) handleAccessList(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
 	err := json.NewEncoder(w).Encode(j)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "encoding response: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "encoding response: %s", err)
 		return
 	}
@ -251,14 +252,14 @@ func (s *Server) handleAccessSet(w http.ResponseWriter, r *http.Request) {
 	list := accessListJSON{}
 	err := json.NewDecoder(r.Body).Decode(&list)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "decoding request: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "decoding request: %s", err)
 		return
 	}
 	err = validateAccessSet(list)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, err.Error())
+		aghhttp.Error(r, w, http.StatusBadRequest, err.Error())
 		return
 	}
@ -266,7 +267,7 @@ func (s *Server) handleAccessSet(w http.ResponseWriter, r *http.Request) {
 	var a *accessCtx
 	a, err = newAccessCtx(list.AllowedClients, list.DisallowedClients, list.BlockedHosts)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "creating access ctx: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "creating access ctx: %s", err)
 		return
 	}
--- a/internal/dnsforward/http.go
+++ b/internal/dnsforward/http.go
@ -9,6 +9,7 @@ import (
 	"strings"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/dnsproxy/proxy"
 	"github.com/AdguardTeam/dnsproxy/upstream"
 	"github.com/AdguardTeam/golibs/errors"
@ -18,12 +19,6 @@ import (
 	"github.com/miekg/dns"
 )
 func httpError(r *http.Request, w http.ResponseWriter, code int, format string, args ...interface{}) {
 	text := fmt.Sprintf(format, args...)
 	log.Info("dns: %s %s: %s", r.Method, r.URL, text)
 	http.Error(w, text, code)
 }
 type dnsConfig struct {
 	Upstreams     *[]string `json:"upstream_dns"`
 	UpstreamsFile *string   `json:"upstream_dns_file"`
@ -119,7 +114,8 @@ func (s *Server) handleGetConfig(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
 	if err = json.NewEncoder(w).Encode(resp); err != nil {
-		httpError(r, w, http.StatusInternalServerError, "json.Encoder: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "json.Encoder: %s", err)
 		return
 	}
 }
@ -198,34 +194,52 @@ func (s *Server) handleSetConfig(w http.ResponseWriter, r *http.Request) {
 	req := dnsConfig{}
 	dec := json.NewDecoder(r.Body)
 	if err := dec.Decode(&req); err != nil {
-		httpError(r, w, http.StatusBadRequest, "json Encode: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "json Encode: %s", err)
 		return
 	}
 	if req.Upstreams != nil {
 		if err := ValidateUpstreams(*req.Upstreams); err != nil {
-			httpError(r, w, http.StatusBadRequest, "wrong upstreams specification: %s", err)
+			aghhttp.Error(r, w, http.StatusBadRequest, "wrong upstreams specification: %s", err)
 			return
 		}
 	}
 	if errBoot, err := req.checkBootstrap(); err != nil {
-		httpError(r, w, http.StatusBadRequest, "%s can not be used as bootstrap dns cause: %s", errBoot, err)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusBadRequest,
 			"%s can not be used as bootstrap dns cause: %s",
 			errBoot,
 			err,
 		)
 		return
 	}
 	if !req.checkBlockingMode() {
-		httpError(r, w, http.StatusBadRequest, "blocking_mode: incorrect value")
+		aghhttp.Error(r, w, http.StatusBadRequest, "blocking_mode: incorrect value")
 		return
 	}
 	if !req.checkUpstreamsMode() {
-		httpError(r, w, http.StatusBadRequest, "upstream_mode: incorrect value")
+		aghhttp.Error(r, w, http.StatusBadRequest, "upstream_mode: incorrect value")
 		return
 	}
 	if !req.checkCacheTTL() {
-		httpError(r, w, http.StatusBadRequest, "cache_ttl_min must be less or equal than cache_ttl_max")
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusBadRequest,
 			"cache_ttl_min must be less or equal than cache_ttl_max",
 		)
 		return
 	}
@ -234,8 +248,7 @@ func (s *Server) handleSetConfig(w http.ResponseWriter, r *http.Request) {
 	if restart {
 		if err := s.Reconfigure(nil); err != nil {
-			httpError(r, w, http.StatusInternalServerError, "%s", err)
+			aghhttp.Error(r, w, http.StatusInternalServerError, "%s", err)
 			return
 		}
 	}
 }
@ -582,7 +595,7 @@ func (s *Server) handleTestUpstreamDNS(w http.ResponseWriter, r *http.Request) {
 	req := &upstreamJSON{}
 	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "Failed to read request body: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to read request body: %s", err)
 		return
 	}
@ -620,7 +633,13 @@ func (s *Server) handleTestUpstreamDNS(w http.ResponseWriter, r *http.Request) {
 	jsonVal, err := json.Marshal(result)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "Unable to marshal status json: %s", err)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusInternalServerError,
 			"Unable to marshal status json: %s",
 			err,
 		)
 		return
 	}
@ -628,9 +647,7 @@ func (s *Server) handleTestUpstreamDNS(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
 	_, err = w.Write(jsonVal)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "Couldn't write body: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't write body: %s", err)
 		return
 	}
 }
@ -641,12 +658,12 @@ func (s *Server) handleTestUpstreamDNS(w http.ResponseWriter, r *http.Request) {
 //  -> dnsforward.handleDNSRequest
 func (s *Server) handleDoH(w http.ResponseWriter, r *http.Request) {
 	if !s.conf.TLSAllowUnencryptedDoH && r.TLS == nil {
-		httpError(r, w, http.StatusNotFound, "Not Found")
+		aghhttp.Error(r, w, http.StatusNotFound, "Not Found")
 		return
 	}
 	if !s.IsRunning() {
-		httpError(r, w, http.StatusInternalServerError, "dns server is not running")
+		aghhttp.Error(r, w, http.StatusInternalServerError, "dns server is not running")
 		return
 	}
--- a/internal/filtering/blocked.go
+++ b/internal/filtering/blocked.go
@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"net/http"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/golibs/log"
 	"github.com/AdguardTeam/urlfilter/rules"
 )
@ -287,7 +288,8 @@ func (d *DNSFilter) handleBlockedServicesList(w http.ResponseWriter, r *http.Req
 	w.Header().Set("Content-Type", "application/json")
 	err := json.NewEncoder(w).Encode(list)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "json.Encode: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "json.Encode: %s", err)
 		return
 	}
 }
@ -296,7 +298,8 @@ func (d *DNSFilter) handleBlockedServicesSet(w http.ResponseWriter, r *http.Requ
 	list := []string{}
 	err := json.NewDecoder(r.Body).Decode(&list)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "json.Decode: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "json.Decode: %s", err)
 		return
 	}
--- a/internal/filtering/filtering.go
+++ b/internal/filtering/filtering.go
@ -864,8 +864,7 @@ func makeResult(matchedRules []rules.Rule, reason Reason) (res Result) {
 	}
 }
-// InitModule manually initializes blocked services map using blockedSvcListID
+// InitModule manually initializes blocked services map.
 // as list ID for the rules.
 func InitModule() {
 	initBlockedServices()
 }
--- a/internal/filtering/rewrites.go
+++ b/internal/filtering/rewrites.go
@ -9,6 +9,7 @@ import (
 	"sort"
 	"strings"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/golibs/log"
 	"github.com/miekg/dns"
 )
@ -206,7 +207,8 @@ func (d *DNSFilter) handleRewriteList(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
 	err := json.NewEncoder(w).Encode(arr)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "json.Encode: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "json.Encode: %s", err)
 		return
 	}
 }
@ -215,7 +217,8 @@ func (d *DNSFilter) handleRewriteAdd(w http.ResponseWriter, r *http.Request) {
 	jsent := rewriteEntryJSON{}
 	err := json.NewDecoder(r.Body).Decode(&jsent)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "json.Decode: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "json.Decode: %s", err)
 		return
 	}
@ -237,7 +240,8 @@ func (d *DNSFilter) handleRewriteDelete(w http.ResponseWriter, r *http.Request)
 	jsent := rewriteEntryJSON{}
 	err := json.NewDecoder(r.Body).Decode(&jsent)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "json.Decode: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "json.Decode: %s", err)
 		return
 	}
--- a/internal/filtering/safebrowsing.go
+++ b/internal/filtering/safebrowsing.go
@ -13,6 +13,7 @@ import (
 	"strings"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/dnsproxy/upstream"
 	"github.com/AdguardTeam/golibs/cache"
 	"github.com/AdguardTeam/golibs/log"
@ -368,12 +369,6 @@ func (d *DNSFilter) checkParental(
 	return check(sctx, res, d.parentalUpstream)
 }
 func httpError(r *http.Request, w http.ResponseWriter, code int, format string, args ...interface{}) {
 	text := fmt.Sprintf(format, args...)
 	log.Info("DNSFilter: %s %s: %s", r.Method, r.URL, text)
 	http.Error(w, text, code)
 }
 func (d *DNSFilter) handleSafeBrowsingEnable(w http.ResponseWriter, r *http.Request) {
 	d.Config.SafeBrowsingEnabled = true
 	d.Config.ConfigModified()
@ -392,7 +387,8 @@ func (d *DNSFilter) handleSafeBrowsingStatus(w http.ResponseWriter, r *http.Requ
 		Enabled: d.Config.SafeBrowsingEnabled,
 	})
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "Unable to write response json: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Unable to write response json: %s", err)
 		return
 	}
 }
@ -415,8 +411,7 @@ func (d *DNSFilter) handleParentalStatus(w http.ResponseWriter, r *http.Request)
 		Enabled: d.Config.ParentalEnabled,
 	})
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "Unable to write response json: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Unable to write response json: %s", err)
 		return
 	}
 }
--- a/internal/filtering/safesearch.go
+++ b/internal/filtering/safesearch.go
@ -11,6 +11,7 @@ import (
 	"net/http"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/golibs/cache"
 	"github.com/AdguardTeam/golibs/log"
 )
@ -152,8 +153,13 @@ func (d *DNSFilter) handleSafeSearchStatus(w http.ResponseWriter, r *http.Reques
 		Enabled: d.Config.SafeSearchEnabled,
 	})
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "Unable to write response json: %s", err)
+		aghhttp.Error(
-		return
+			r,
 			w,
 			http.StatusInternalServerError,
 			"Unable to write response json: %s",
 			err,
 		)
 	}
 }
--- a/internal/home/auth.go
+++ b/internal/home/auth.go
@ -13,6 +13,7 @@ import (
 	"sync"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/golibs/log"
 	"github.com/AdguardTeam/golibs/netutil"
 	"github.com/AdguardTeam/golibs/timeutil"
@ -417,7 +418,7 @@ func handleLogin(w http.ResponseWriter, r *http.Request) {
 	req := loginJSON{}
 	err := json.NewDecoder(r.Body).Decode(&req)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "json decode: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "json decode: %s", err)
 		return
 	}
@ -430,7 +431,7 @@ func handleLogin(w http.ResponseWriter, r *http.Request) {
 	//
 	// TODO(e.burkov): Use realIP when the issue will be fixed.
 	if remoteAddr, err = netutil.SplitHost(r.RemoteAddr); err != nil {
-		httpError(w, http.StatusBadRequest, "auth: getting remote address: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "auth: getting remote address: %s", err)
 		return
 	}
@ -438,7 +439,7 @@ func handleLogin(w http.ResponseWriter, r *http.Request) {
 	if blocker := Context.auth.blocker; blocker != nil {
 		if left := blocker.check(remoteAddr); left > 0 {
 			w.Header().Set("Retry-After", strconv.Itoa(int(left.Seconds())))
-			httpError(w, http.StatusTooManyRequests, "auth: blocked for %s", left)
+			aghhttp.Error(r, w, http.StatusTooManyRequests, "auth: blocked for %s", left)
 			return
 		}
@ -447,7 +448,7 @@ func handleLogin(w http.ResponseWriter, r *http.Request) {
 	var cookie string
 	cookie, err = Context.auth.httpCookie(req, remoteAddr)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "crypto rand reader: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "crypto rand reader: %s", err)
 		return
 	}
@ -479,7 +480,7 @@ func handleLogin(w http.ResponseWriter, r *http.Request) {
 	h.Set("Pragma", "no-cache")
 	h.Set("Expires", "0")
-	returnOK(w)
+	aghhttp.OK(w)
 }
 func handleLogout(w http.ResponseWriter, r *http.Request) {
--- a/internal/home/clientshttp.go
+++ b/internal/home/clientshttp.go
@ -6,6 +6,7 @@ import (
 	"net"
 	"net/http"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/golibs/log"
 )
@ -58,7 +59,7 @@ type clientListJSON struct {
 }
 // respond with information about configured clients
-func (clients *clientsContainer) handleGetClients(w http.ResponseWriter, _ *http.Request) {
+func (clients *clientsContainer) handleGetClients(w http.ResponseWriter, r *http.Request) {
 	data := clientListJSON{}
 	clients.lock.Lock()
@ -106,7 +107,14 @@ func (clients *clientsContainer) handleGetClients(w http.ResponseWriter, _ *http
 	w.Header().Set("Content-Type", "application/json")
 	e := json.NewEncoder(w).Encode(data)
 	if e != nil {
-		httpError(w, http.StatusInternalServerError, "Failed to encode to json: %v", e)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusInternalServerError,
 			"Failed to encode to json: %v",
 			e,
 		)
 		return
 	}
 }
@ -154,7 +162,7 @@ func (clients *clientsContainer) handleAddClient(w http.ResponseWriter, r *http.
 	cj := clientJSON{}
 	err := json.NewDecoder(r.Body).Decode(&cj)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "failed to process request body: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "failed to process request body: %s", err)
 		return
 	}
@ -162,11 +170,14 @@ func (clients *clientsContainer) handleAddClient(w http.ResponseWriter, r *http.
 	c := jsonToClient(cj)
 	ok, err := clients.Add(c)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "%s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 		return
 	}
 	if !ok {
-		httpError(w, http.StatusBadRequest, "Client already exists")
+		aghhttp.Error(r, w, http.StatusBadRequest, "Client already exists")
 		return
 	}
@ -178,19 +189,19 @@ func (clients *clientsContainer) handleDelClient(w http.ResponseWriter, r *http.
 	cj := clientJSON{}
 	err := json.NewDecoder(r.Body).Decode(&cj)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "failed to process request body: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "failed to process request body: %s", err)
 		return
 	}
 	if len(cj.Name) == 0 {
-		httpError(w, http.StatusBadRequest, "client's name must be non-empty")
+		aghhttp.Error(r, w, http.StatusBadRequest, "client's name must be non-empty")
 		return
 	}
 	if !clients.Del(cj.Name) {
-		httpError(w, http.StatusBadRequest, "Client not found")
+		aghhttp.Error(r, w, http.StatusBadRequest, "Client not found")
 		return
 	}
@ -207,20 +218,22 @@ func (clients *clientsContainer) handleUpdateClient(w http.ResponseWriter, r *ht
 	dj := updateJSON{}
 	err := json.NewDecoder(r.Body).Decode(&dj)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "failed to process request body: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "failed to process request body: %s", err)
 		return
 	}
 	if len(dj.Name) == 0 {
-		httpError(w, http.StatusBadRequest, "Invalid request")
+		aghhttp.Error(r, w, http.StatusBadRequest, "Invalid request")
 		return
 	}
 	c := jsonToClient(dj.Data)
 	err = clients.Update(dj.Name, c)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "%s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 		return
 	}
@ -256,7 +269,7 @@ func (clients *clientsContainer) handleFindClient(w http.ResponseWriter, r *http
 	w.Header().Set("Content-Type", "application/json")
 	err := json.NewEncoder(w).Encode(data)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "Couldn't write response: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't write response: %s", err)
 	}
 }
--- a/internal/home/config.go
+++ b/internal/home/config.go
@ -1,7 +1,6 @@
 package home
 import (
 	"fmt"
 	"net"
 	"os"
 	"path/filepath"
@ -274,17 +273,34 @@ func getLogSettings() logSettings {
 }
 // parseConfig loads configuration from the YAML file
-func parseConfig() error {
+func parseConfig() (err error) {
-	configFile := config.getConfigFilename()
+	var fileData []byte
-	log.Debug("Reading config file: %s", configFile)
+	fileData, err = readConfigFile()
 	yamlFile, err := readConfigFile()
 	if err != nil {
 		return err
 	}
 	config.fileData = nil
-	err = yaml.Unmarshal(yamlFile, &config)
+	err = yaml.Unmarshal(fileData, &config)
 	if err != nil {
-		log.Error("Couldn't parse config file: %s", err)
+		return err
 	}
 	pm := portsMap{}
 	pm.add(
 		config.BindPort,
 		config.BetaBindPort,
 		config.DNS.Port,
 	)
 	if config.TLS.Enabled {
 		pm.add(
 			config.TLS.PortHTTPS,
 			config.TLS.PortDNSOverTLS,
 			config.TLS.PortDNSOverQUIC,
 			config.TLS.PortDNSCrypt,
 		)
 	}
 	if err = pm.validate(); err != nil {
 		return err
 	}
@ -299,18 +315,17 @@ func parseConfig() error {
 	return nil
 }
-// readConfigFile reads config file contents if it exists
+// readConfigFile reads configuration file contents.
-func readConfigFile() ([]byte, error) {
+func readConfigFile() (fileData []byte, err error) {
-	if len(config.fileData) != 0 {
+	if len(config.fileData) > 0 {
 		return config.fileData, nil
 	}
-	configFile := config.getConfigFilename()
+	name := config.getConfigFilename()
-	d, err := os.ReadFile(configFile)
+	log.Debug("reading config file: %s", name)
-	if err != nil {
+
-		return nil, fmt.Errorf("couldn't read config file %s: %w", configFile, err)
+	// Do not wrap the error because it's informative enough as is.
-	}
+	return os.ReadFile(name)
 	return d, nil
 }
 // Saves configuration to the YAML file and also saves the user filter contents to a file
--- a/internal/home/control.go
+++ b/internal/home/control.go
@ -9,6 +9,7 @@ import (
 	"runtime"
 	"strings"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
 	"github.com/AdguardTeam/AdGuardHome/internal/dnsforward"
 	"github.com/AdguardTeam/AdGuardHome/internal/version"
@ -17,23 +18,6 @@ import (
 	"github.com/NYTimes/gziphandler"
 )
 // ----------------
 // helper functions
 // ----------------
 func returnOK(w http.ResponseWriter) {
 	_, err := fmt.Fprintf(w, "OK\n")
 	if err != nil {
 		httpError(w, http.StatusInternalServerError, "Couldn't write body: %s", err)
 	}
 }
 func httpError(w http.ResponseWriter, code int, format string, args ...interface{}) {
 	text := fmt.Sprintf(format, args...)
 	log.Info(text)
 	http.Error(w, text, code)
 }
 // appendDNSAddrs is a convenient helper for appending a formatted form of DNS
 // addresses to a slice of strings.
 func appendDNSAddrs(dst []string, addrs ...net.IP) (res []string) {
@ -125,12 +109,12 @@ type statusResponse struct {
 	Language        string `json:"language"`
 }
-func handleStatus(w http.ResponseWriter, _ *http.Request) {
+func handleStatus(w http.ResponseWriter, r *http.Request) {
 	dnsAddrs, err := collectDNSAddresses()
 	if err != nil {
 		// Don't add a lot of formatting, since the error is already
 		// wrapped by collectDNSAddresses.
-		httpError(w, http.StatusInternalServerError, "%s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "%s", err)
 		return
 	}
@ -165,7 +149,7 @@ func handleStatus(w http.ResponseWriter, _ *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
 	err = json.NewEncoder(w).Encode(resp)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "Unable to write response json: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Unable to write response json: %s", err)
 		return
 	}
@ -182,7 +166,7 @@ func handleGetProfile(w http.ResponseWriter, r *http.Request) {
 	data, err := json.Marshal(pj)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "json.Marshal: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "json.Marshal: %s", err)
 		return
 	}
 	_, _ = w.Write(data)
@ -295,7 +279,7 @@ func handleHTTPSRedirect(w http.ResponseWriter, r *http.Request) (ok bool) {
 	host, err := netutil.SplitHost(r.Host)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "bad host: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "bad host: %s", err)
 		return false
 	}
--- a/internal/home/controlfiltering.go
+++ b/internal/home/controlfiltering.go
@ -12,6 +12,7 @@ import (
 	"strings"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/golibs/log"
 	"github.com/miekg/dns"
 )
@ -49,7 +50,8 @@ func (f *Filtering) handleFilteringAddURL(w http.ResponseWriter, r *http.Request
 	fj := filterAddJSON{}
 	err := json.NewDecoder(r.Body).Decode(&fj)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "Failed to parse request body json: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to parse request body json: %s", err)
 		return
 	}
@ -63,7 +65,8 @@ func (f *Filtering) handleFilteringAddURL(w http.ResponseWriter, r *http.Request
 	// Check for duplicates
 	if filterExists(fj.URL) {
-		httpError(w, http.StatusBadRequest, "Filter URL already added -- %s", fj.URL)
+		aghhttp.Error(r, w, http.StatusBadRequest, "Filter URL already added -- %s", fj.URL)
 		return
 	}
@ -79,17 +82,35 @@ func (f *Filtering) handleFilteringAddURL(w http.ResponseWriter, r *http.Request
 	// Download the filter contents
 	ok, err := f.update(&filt)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "Couldn't fetch filter from url %s: %s", filt.URL, err)
+		aghhttp.Error(
-		return
+			r,
-	}
+			w,
-	if !ok {
+			http.StatusBadRequest,
-		httpError(w, http.StatusBadRequest, "Filter at the url %s is invalid (maybe it points to blank page?)", filt.URL)
+			"Couldn't fetch filter from url %s: %s",
 			filt.URL,
 			err,
 		)
 		return
 	}
-	// URL is deemed valid, append it to filters, update config, write new filter file and tell dns to reload it
+	if !ok {
 		aghhttp.Error(
 			r,
 			w,
 			http.StatusBadRequest,
 			"Filter at the url %s is invalid (maybe it points to blank page?)",
 			filt.URL,
 		)
 		return
 	}
 	// URL is assumed valid so append it to filters, update config, write new
 	// file and reload it to engines.
 	if !filterAdd(filt) {
-		httpError(w, http.StatusBadRequest, "Filter URL already added -- %s", filt.URL)
+		aghhttp.Error(r, w, http.StatusBadRequest, "Filter URL already added -- %s", filt.URL)
 		return
 	}
@ -98,7 +119,7 @@ func (f *Filtering) handleFilteringAddURL(w http.ResponseWriter, r *http.Request
 	_, err = fmt.Fprintf(w, "OK %d rules\n", filt.RulesCount)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "Couldn't write body: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't write body: %s", err)
 	}
 }
@ -111,7 +132,8 @@ func (f *Filtering) handleFilteringRemoveURL(w http.ResponseWriter, r *http.Requ
 	req := request{}
 	err := json.NewDecoder(r.Body).Decode(&req)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "failed to parse request body json: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "failed to parse request body json: %s", err)
 		return
 	}
@ -152,7 +174,7 @@ func (f *Filtering) handleFilteringRemoveURL(w http.ResponseWriter, r *http.Requ
 	_, err = fmt.Fprintf(w, "OK %d rules\n", deleted.RulesCount)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "couldn't write body: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "couldn't write body: %s", err)
 	}
 }
@ -172,7 +194,8 @@ func (f *Filtering) handleFilteringSetURL(w http.ResponseWriter, r *http.Request
 	fj := filterURLReq{}
 	err := json.NewDecoder(r.Body).Decode(&fj)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "json decode: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "json decode: %s", err)
 		return
 	}
@ -228,7 +251,8 @@ func (f *Filtering) handleFilteringSetRules(w http.ResponseWriter, r *http.Reque
 	// This use of ReadAll is safe, because request's body is now limited.
 	body, err := io.ReadAll(r.Body)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "Failed to read request body: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to read request body: %s", err)
 		return
 	}
@ -250,7 +274,8 @@ func (f *Filtering) handleFilteringRefresh(w http.ResponseWriter, r *http.Reques
 	req := Req{}
 	err = json.NewDecoder(r.Body).Decode(&req)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "json decode: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "json decode: %s", err)
 		return
 	}
@ -270,13 +295,15 @@ func (f *Filtering) handleFilteringRefresh(w http.ResponseWriter, r *http.Reques
 		resp.Updated, err = f.refreshFilters(flags|filterRefreshForce, false)
 	}()
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "%s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "%s", err)
 		return
 	}
 	js, err := json.Marshal(resp)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "json encode: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "json encode: %s", err)
 		return
 	}
 	w.Header().Set("Content-Type", "application/json")
@ -335,13 +362,14 @@ func (f *Filtering) handleFilteringStatus(w http.ResponseWriter, r *http.Request
 	jsonVal, err := json.Marshal(resp)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "json encode: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "json encode: %s", err)
 		return
 	}
 	w.Header().Set("Content-Type", "application/json")
 	_, err = w.Write(jsonVal)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "http write: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "http write: %s", err)
 	}
 }
@ -350,12 +378,14 @@ func (f *Filtering) handleFilteringConfig(w http.ResponseWriter, r *http.Request
 	req := filteringConfig{}
 	err := json.NewDecoder(r.Body).Decode(&req)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "json decode: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "json decode: %s", err)
 		return
 	}
 	if !checkFiltersUpdateIntervalHours(req.Interval) {
-		httpError(w, http.StatusBadRequest, "Unsupported interval")
+		aghhttp.Error(r, w, http.StatusBadRequest, "Unsupported interval")
 		return
 	}
@ -408,7 +438,15 @@ func (f *Filtering) handleCheckHost(w http.ResponseWriter, r *http.Request) {
 	Context.dnsFilter.ApplyBlockedServices(&setts, nil, true)
 	result, err := Context.dnsFilter.CheckHost(host, dns.TypeA, &setts)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "couldn't apply filtering: %s: %s", host, err)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusInternalServerError,
 			"couldn't apply filtering: %s: %s",
 			host,
 			err,
 		)
 		return
 	}
@ -433,7 +471,8 @@ func (f *Filtering) handleCheckHost(w http.ResponseWriter, r *http.Request) {
 	js, err := json.Marshal(resp)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "json encode: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "json encode: %s", err)
 		return
 	}
 	w.Header().Set("Content-Type", "application/json")
--- a/internal/home/controlinstall.go
+++ b/internal/home/controlinstall.go
@ -14,6 +14,7 @@ import (
 	"strings"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
 	"github.com/AdguardTeam/golibs/errors"
 	"github.com/AdguardTeam/golibs/log"
@ -34,7 +35,8 @@ func (web *Web) handleInstallGetAddresses(w http.ResponseWriter, r *http.Request
 	ifaces, err := aghnet.GetValidNetInterfacesForWeb()
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "Couldn't get interfaces: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't get interfaces: %s", err)
 		return
 	}
@ -46,7 +48,14 @@ func (web *Web) handleInstallGetAddresses(w http.ResponseWriter, r *http.Request
 	w.Header().Set("Content-Type", "application/json")
 	err = json.NewEncoder(w).Encode(data)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "Unable to marshal default addresses to json: %s", err)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusInternalServerError,
 			"Unable to marshal default addresses to json: %s",
 			err,
 		)
 		return
 	}
 }
@ -84,23 +93,32 @@ type checkConfigResp struct {
 func (web *Web) handleInstallCheckConfig(w http.ResponseWriter, r *http.Request) {
 	reqData := checkConfigReq{}
 	respData := checkConfigResp{}
 	err := json.NewDecoder(r.Body).Decode(&reqData)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "Failed to parse 'check_config' JSON data: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to parse 'check_config' JSON data: %s", err)
 		return
 	}
-	if reqData.Web.Port != 0 && reqData.Web.Port != config.BindPort && reqData.Web.Port != config.BetaBindPort {
+	pm := portsMap{}
-		err = aghnet.CheckPortAvailable(reqData.Web.IP, reqData.Web.Port)
+	pm.add(config.BindPort, config.BetaBindPort, reqData.Web.Port)
 	if err = pm.validate(); err != nil {
 		respData.Web.Status = err.Error()
 	} else if reqData.Web.Port != 0 {
 		err = aghnet.CheckPort("tcp", reqData.Web.IP, reqData.Web.Port)
 		if err != nil {
 			respData.Web.Status = err.Error()
 		}
 	}
-	if reqData.DNS.Port != 0 {
+	pm.add(reqData.DNS.Port)
-		err = aghnet.CheckPacketPortAvailable(reqData.DNS.IP, reqData.DNS.Port)
+	if err = pm.validate(); err != nil {
 		respData.DNS.Status = err.Error()
 	} else if reqData.DNS.Port != 0 {
 		err = aghnet.CheckPort("udp", reqData.DNS.IP, reqData.DNS.Port)
-		if aghnet.ErrorIsAddrInUse(err) {
+		if aghnet.IsAddrInUse(err) {
 			canAutofix := checkDNSStubListener()
 			if canAutofix && reqData.DNS.Autofix {
@ -109,7 +127,7 @@ func (web *Web) handleInstallCheckConfig(w http.ResponseWriter, r *http.Request)
 					log.Error("Couldn't disable DNSStubListener: %s", err)
 				}
-				err = aghnet.CheckPacketPortAvailable(reqData.DNS.IP, reqData.DNS.Port)
+				err = aghnet.CheckPort("udp", reqData.DNS.IP, reqData.DNS.Port)
 				canAutofix = false
 			}
@ -117,7 +135,7 @@ func (web *Web) handleInstallCheckConfig(w http.ResponseWriter, r *http.Request)
 		}
 		if err == nil {
-			err = aghnet.CheckPortAvailable(reqData.DNS.IP, reqData.DNS.Port)
+			err = aghnet.CheckPort("tcp", reqData.DNS.IP, reqData.DNS.Port)
 		}
 		if err != nil {
@ -130,7 +148,8 @@ func (web *Web) handleInstallCheckConfig(w http.ResponseWriter, r *http.Request)
 	w.Header().Set("Content-Type", "application/json")
 	err = json.NewEncoder(w).Encode(respData)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "Unable to marshal JSON: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Unable to marshal JSON: %s", err)
 		return
 	}
 }
@ -287,21 +306,21 @@ func shutdownSrv(ctx context.Context, srv *http.Server) {
 func (web *Web) handleInstallConfigure(w http.ResponseWriter, r *http.Request) {
 	req, restartHTTP, err := decodeApplyConfigReq(r.Body)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "%s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 		return
 	}
-	err = aghnet.CheckPacketPortAvailable(req.DNS.IP, req.DNS.Port)
+	err = aghnet.CheckPort("udp", req.DNS.IP, req.DNS.Port)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "%s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 		return
 	}
-	err = aghnet.CheckPortAvailable(req.DNS.IP, req.DNS.Port)
+	err = aghnet.CheckPort("tcp", req.DNS.IP, req.DNS.Port)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "%s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 		return
 	}
@ -315,28 +334,29 @@ func (web *Web) handleInstallConfigure(w http.ResponseWriter, r *http.Request) {
 	config.DNS.BindHosts = []net.IP{req.DNS.IP}
 	config.DNS.Port = req.DNS.Port
-	// TODO(e.burkov): StartMods() should be put in a separate goroutine at
+	// TODO(e.burkov): StartMods() should be put in a separate goroutine at the
-	// the moment we'll allow setting up TLS in the initial configuration or
+	// moment we'll allow setting up TLS in the initial configuration or the
-	// the configuration itself will use HTTPS protocol, because the
+	// configuration itself will use HTTPS protocol, because the underlying
-	// underlying functions potentially restart the HTTPS server.
+	// functions potentially restart the HTTPS server.
 	err = StartMods()
 	if err != nil {
 		Context.firstRun = true
 		copyInstallSettings(config, curConfig)
-		httpError(w, http.StatusInternalServerError, "%s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "%s", err)
 		return
 	}
-	u := User{}
+	u := &User{
-	u.Name = req.Username
+		Name: req.Username,
-	Context.auth.UserAdd(&u, req.Password)
+	}
 	Context.auth.UserAdd(u, req.Password)
 	err = config.write()
 	if err != nil {
 		Context.firstRun = true
 		copyInstallSettings(config, curConfig)
-		httpError(w, http.StatusInternalServerError, "Couldn't write config: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't write config: %s", err)
 		return
 	}
@ -347,7 +367,7 @@ func (web *Web) handleInstallConfigure(w http.ResponseWriter, r *http.Request) {
 	registerControlHandlers()
-	returnOK(w)
+	aghhttp.OK(w)
 	if f, ok := w.(http.Flusher); ok {
 		f.Flush()
 	}
@ -386,7 +406,7 @@ func decodeApplyConfigReq(r io.Reader) (req *applyConfigReq, restartHTTP bool, e
 	restartHTTP = !config.BindHost.Equal(req.Web.IP) || config.BindPort != req.Web.Port
 	if restartHTTP {
-		err = aghnet.CheckPortAvailable(req.Web.IP, req.Web.Port)
+		err = aghnet.CheckPort("tcp", req.Web.IP, req.Web.Port)
 		if err != nil {
 			return nil, false, fmt.Errorf(
 				"checking address %s:%d: %w",
@ -437,12 +457,14 @@ func (web *Web) handleInstallCheckConfigBeta(w http.ResponseWriter, r *http.Requ
 	reqData := checkConfigReqBeta{}
 	err := json.NewDecoder(r.Body).Decode(&reqData)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "Failed to parse 'check_config' JSON data: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to parse 'check_config' JSON data: %s", err)
 		return
 	}
 	if len(reqData.DNS.IP) == 0 || len(reqData.Web.IP) == 0 {
-		httpError(w, http.StatusBadRequest, http.StatusText(http.StatusBadRequest))
+		aghhttp.Error(r, w, http.StatusBadRequest, http.StatusText(http.StatusBadRequest))
 		return
 	}
@ -464,7 +486,14 @@ func (web *Web) handleInstallCheckConfigBeta(w http.ResponseWriter, r *http.Requ
 	err = json.NewEncoder(nonBetaReqBody).Encode(nonBetaReqData)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "Failed to encode 'check_config' JSON data: %s", err)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusBadRequest,
 			"Failed to encode 'check_config' JSON data: %s",
 			err,
 		)
 		return
 	}
 	body := nonBetaReqBody.String()
@ -505,12 +534,14 @@ func (web *Web) handleInstallConfigureBeta(w http.ResponseWriter, r *http.Reques
 	reqData := applyConfigReqBeta{}
 	err := json.NewDecoder(r.Body).Decode(&reqData)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "Failed to parse 'check_config' JSON data: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to parse 'check_config' JSON data: %s", err)
 		return
 	}
 	if len(reqData.DNS.IP) == 0 || len(reqData.Web.IP) == 0 {
-		httpError(w, http.StatusBadRequest, http.StatusText(http.StatusBadRequest))
+		aghhttp.Error(r, w, http.StatusBadRequest, http.StatusText(http.StatusBadRequest))
 		return
 	}
@ -531,7 +562,14 @@ func (web *Web) handleInstallConfigureBeta(w http.ResponseWriter, r *http.Reques
 	err = json.NewEncoder(nonBetaReqBody).Encode(nonBetaReqData)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "Failed to encode 'check_config' JSON data: %s", err)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusBadRequest,
 			"Failed to encode 'check_config' JSON data: %s",
 			err,
 		)
 		return
 	}
 	body := nonBetaReqBody.String()
@ -564,7 +602,8 @@ func (web *Web) handleInstallGetAddressesBeta(w http.ResponseWriter, r *http.Req
 	ifaces, err := aghnet.GetValidNetInterfacesForWeb()
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "Couldn't get interfaces: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't get interfaces: %s", err)
 		return
 	}
@ -573,7 +612,14 @@ func (web *Web) handleInstallGetAddressesBeta(w http.ResponseWriter, r *http.Req
 	w.Header().Set("Content-Type", "application/json")
 	err = json.NewEncoder(w).Encode(data)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "Unable to marshal default addresses to json: %s", err)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusInternalServerError,
 			"Unable to marshal default addresses to json: %s",
 			err,
 		)
 		return
 	}
 }
--- a/internal/home/controlupdate.go
+++ b/internal/home/controlupdate.go
@ -11,6 +11,7 @@ import (
 	"syscall"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghnet"
 	"github.com/AdguardTeam/AdGuardHome/internal/updater"
 	"github.com/AdguardTeam/golibs/errors"
@ -43,7 +44,8 @@ func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
 	if r.ContentLength != 0 {
 		err = json.NewDecoder(r.Body).Decode(req)
 		if err != nil {
-			httpError(w, http.StatusBadRequest, "JSON parse: %s", err)
+			aghhttp.Error(r, w, http.StatusBadRequest, "JSON parse: %s", err)
 			return
 		}
 	}
@ -77,7 +79,15 @@ func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
 	if err != nil {
 		vcu := Context.updater.VersionCheckURL()
 		// TODO(a.garipov): Figure out the purpose of %T verb.
-		httpError(w, http.StatusBadGateway, "Couldn't get version check json from %s: %T %s\n", vcu, err, err)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusBadGateway,
 			"Couldn't get version check json from %s: %T %s\n",
 			vcu,
 			err,
 			err,
 		)
 		return
 	}
@ -87,24 +97,26 @@ func handleGetVersionJSON(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "application/json")
 	err = json.NewEncoder(w).Encode(resp)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "Couldn't write body: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't write body: %s", err)
 	}
 }
 // handleUpdate performs an update to the latest available version procedure.
-func handleUpdate(w http.ResponseWriter, _ *http.Request) {
+func handleUpdate(w http.ResponseWriter, r *http.Request) {
 	if Context.updater.NewVersion() == "" {
-		httpError(w, http.StatusBadRequest, "/update request isn't allowed now")
+		aghhttp.Error(r, w, http.StatusBadRequest, "/update request isn't allowed now")
 		return
 	}
 	err := Context.updater.Update()
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "%s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "%s", err)
 		return
 	}
-	returnOK(w)
+	aghhttp.OK(w)
 	if f, ok := w.(http.Flusher); ok {
 		f.Flush()
 	}
--- a/internal/home/home.go
+++ b/internal/home/home.go
@ -159,14 +159,11 @@ func setupContext(args options) {
 	}
 	if !Context.firstRun {
-		// Do the upgrade if necessary
+		// Do the upgrade if necessary.
 		err := upgradeConfig()
-		if err != nil {
+		fatalOnError(err)
 			log.Fatal(err)
 		}
-		err = parseConfig()
+		if err = parseConfig(); err != nil {
 		if err != nil {
 			log.Error("parsing configuration file: %s", err)
 			os.Exit(1)
@ -186,15 +183,15 @@ func setupContext(args options) {
 // unsupported errors and returns nil.  If err is nil, logIfUnsupported returns
 // nil.  Otherise, it returns err.
 func logIfUnsupported(msg string, err error) (outErr error) {
-	if unsupErr := (&aghos.UnsupportedError{}); errors.As(err, &unsupErr) {
+	if errors.As(err, new(*aghos.UnsupportedError)) {
 		log.Debug(msg, err)
 	} else if err != nil {
 		return err
 	}
 		return nil
 	}
 	return err
 }
 // configureOS sets the OS-related configuration.
 func configureOS(conf *configuration) (err error) {
 	osConf := conf.OSConfig
@ -297,13 +294,32 @@ func setupConfig(args options) (err error) {
 	Context.clients.Init(config.Clients, Context.dhcpServer, Context.etcHosts)
 	if args.bindPort != 0 {
 		pm := portsMap{}
 		pm.add(
 			args.bindPort,
 			config.BetaBindPort,
 			config.DNS.Port,
 		)
 		if config.TLS.Enabled {
 			pm.add(
 				config.TLS.PortHTTPS,
 				config.TLS.PortDNSOverTLS,
 				config.TLS.PortDNSOverQUIC,
 				config.TLS.PortDNSCrypt,
 			)
 		}
 		if err = pm.validate(); err != nil {
 			return err
 		}
 		config.BindPort = args.bindPort
 	}
 	// override bind host/port from the console
 	if args.bindHost != nil {
 		config.BindHost = args.bindHost
 	}
 	if args.bindPort != 0 {
 		config.BindPort = args.bindPort
 	}
 	if len(args.pidFile) != 0 && writePIDFile(args.pidFile) {
 		Context.pidFileName = args.pidFile
 	}
@ -766,8 +782,7 @@ func printHTTPAddresses(proto string) {
 		port = tlsConf.PortHTTPS
 	}
-	// TODO(e.burkov): Inspect and perhaps merge with the previous
+	// TODO(e.burkov): Inspect and perhaps merge with the previous condition.
 	// condition.
 	if proto == schemeHTTPS && tlsConf.ServerName != "" {
 		printWebAddrs(proto, tlsConf.ServerName, tlsConf.PortHTTPS, 0)
--- a/internal/home/i18n.go
+++ b/internal/home/i18n.go
@ -6,6 +6,7 @@ import (
 	"net/http"
 	"strings"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/golibs/log"
 	"github.com/AdguardTeam/golibs/stringutil"
 )
@ -96,5 +97,5 @@ func handleI18nChangeLanguage(w http.ResponseWriter, r *http.Request) {
 	}()
 	onConfigModified()
-	returnOK(w)
+	aghhttp.OK(w)
 }
--- a/internal/home/portsmap.go
+++ b/internal/home/portsmap.go
@ -0,0 +1,63 @@
 package home
 import (
 	"fmt"
 	"strconv"
 	"strings"
 	"github.com/AdguardTeam/golibs/errors"
 	"github.com/AdguardTeam/golibs/stringutil"
 )
 // portsMap is a helper type for mapping a network port to the number of its
 // users.
 type portsMap map[int]int
 // add binds each of ps.  Zeroes are skipped.
 func (pm portsMap) add(ps ...int) {
 	for _, p := range ps {
 		if p == 0 {
 			continue
 		}
 		pm[p]++
 	}
 }
 // validate returns an error about all the ports bound several times.
 func (pm portsMap) validate() (err error) {
 	overbound := []int{}
 	for p, num := range pm {
 		if num > 1 {
 			overbound = append(overbound, p)
 			pm[p] = 1
 		}
 	}
 	switch len(overbound) {
 	case 0:
 		return nil
 	case 1:
 		return fmt.Errorf("port %d is already used", overbound[0])
 	default:
 		b := &strings.Builder{}
 		// TODO(e.burkov, a.garipov):  Add JoinToBuilder helper to stringutil.
 		stringutil.WriteToBuilder(b, "ports ", strconv.Itoa(overbound[0]))
 		for _, p := range overbound[1:] {
 			stringutil.WriteToBuilder(b, ", ", strconv.Itoa(p))
 		}
 		stringutil.WriteToBuilder(b, " are already used")
 		return errors.Error(b.String())
 	}
 }
 // validatePorts is a helper function for a single-step ports binding
 // validation.
 func validatePorts(ps ...int) (err error) {
 	pm := portsMap{}
 	pm.add(ps...)
 	return pm.validate()
 }
--- a/internal/home/tls.go
+++ b/internal/home/tls.go
@ -20,6 +20,7 @@ import (
 	"sync"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/AdGuardHome/internal/dnsforward"
 	"github.com/AdguardTeam/golibs/errors"
 	"github.com/AdguardTeam/golibs/log"
@ -224,7 +225,7 @@ type tlsConfigSettingsExt struct {
 	PrivateKeySaved bool `yaml:"-" json:"private_key_saved,inline"`
 }
-func (t *TLSMod) handleTLSStatus(w http.ResponseWriter, _ *http.Request) {
+func (t *TLSMod) handleTLSStatus(w http.ResponseWriter, r *http.Request) {
 	t.confLock.Lock()
 	data := tlsConfig{
 		tlsConfigSettingsExt: tlsConfigSettingsExt{
@ -233,13 +234,14 @@ func (t *TLSMod) handleTLSStatus(w http.ResponseWriter, _ *http.Request) {
 		tlsConfigStatus: t.status,
 	}
 	t.confLock.Unlock()
-	marshalTLS(w, data)
+	marshalTLS(w, r, data)
 }
 func (t *TLSMod) handleTLSValidate(w http.ResponseWriter, r *http.Request) {
 	setts, err := unmarshalTLS(r)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
 		return
 	}
@ -247,8 +249,31 @@ func (t *TLSMod) handleTLSValidate(w http.ResponseWriter, r *http.Request) {
 		setts.PrivateKey = t.conf.PrivateKey
 	}
 	if setts.Enabled {
 		if err = validatePorts(
 			config.BindPort,
 			config.BetaBindPort,
 			config.DNS.Port,
 			setts.PortHTTPS,
 			setts.PortDNSOverTLS,
 			setts.PortDNSOverQUIC,
 			setts.PortDNSCrypt,
 		); err != nil {
 			aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 			return
 		}
 	}
 	if !WebCheckPortAvailable(setts.PortHTTPS) {
-		httpError(w, http.StatusBadRequest, "port %d is not available, cannot enable HTTPS on it", setts.PortHTTPS)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusBadRequest,
 			"port %d is not available, cannot enable HTTPS on it",
 			setts.PortHTTPS,
 		)
 		return
 	}
@ -261,7 +286,8 @@ func (t *TLSMod) handleTLSValidate(w http.ResponseWriter, r *http.Request) {
 		tlsConfigSettingsExt: setts,
 		tlsConfigStatus:      status,
 	}
-	marshalTLS(w, data)
+
 	marshalTLS(w, r, data)
 }
 func (t *TLSMod) setConfig(newConf tlsConfigSettings, status tlsConfigStatus) (restartHTTPS bool) {
@ -302,7 +328,8 @@ func (t *TLSMod) setConfig(newConf tlsConfigSettings, status tlsConfigStatus) (r
 func (t *TLSMod) handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
 	data, err := unmarshalTLS(r)
 	if err != nil {
-		httpError(w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "Failed to unmarshal TLS config: %s", err)
 		return
 	}
@ -310,8 +337,32 @@ func (t *TLSMod) handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
 		data.PrivateKey = t.conf.PrivateKey
 	}
 	if data.Enabled {
 		if err = validatePorts(
 			config.BindPort,
 			config.BetaBindPort,
 			config.DNS.Port,
 			data.PortHTTPS,
 			data.PortDNSOverTLS,
 			data.PortDNSOverQUIC,
 			data.PortDNSCrypt,
 		); err != nil {
 			aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 			return
 		}
 	}
 	// TODO(e.burkov):  Investigate and perhaps check other ports.
 	if !WebCheckPortAvailable(data.PortHTTPS) {
-		httpError(w, http.StatusBadRequest, "port %d is not available, cannot enable HTTPS on it", data.PortHTTPS)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusBadRequest,
 			"port %d is not available, cannot enable HTTPS on it",
 			data.PortHTTPS,
 		)
 		return
 	}
@ -321,7 +372,7 @@ func (t *TLSMod) handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
 			tlsConfigSettingsExt: data,
 			tlsConfigStatus:      t.status,
 		}
-		marshalTLS(w, data2)
+		marshalTLS(w, r, data2)
 		return
 	}
@ -334,7 +385,7 @@ func (t *TLSMod) handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
 	err = reconfigureDNSServer()
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "%s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "%s", err)
 		return
 	}
@ -344,15 +395,15 @@ func (t *TLSMod) handleTLSConfigure(w http.ResponseWriter, r *http.Request) {
 		tlsConfigStatus:      t.status,
 	}
-	marshalTLS(w, data2)
+	marshalTLS(w, r, data2)
 	if f, ok := w.(http.Flusher); ok {
 		f.Flush()
 	}
-	// The background context is used because the TLSConfigChanged wraps
+	// The background context is used because the TLSConfigChanged wraps context
-	// context with timeout on its own and shuts down the server, which
+	// with timeout on its own and shuts down the server, which handles current
-	// handles current request. It is also should be done in a separate
+	// request. It is also should be done in a separate goroutine due to the
-	// goroutine due to the same reason.
+	// same reason.
 	if restartHTTPS {
 		go func() {
 			Context.web.TLSConfigChanged(context.Background(), data.tlsConfigSettings)
@ -595,7 +646,7 @@ func unmarshalTLS(r *http.Request) (tlsConfigSettingsExt, error) {
 	return data, nil
 }
-func marshalTLS(w http.ResponseWriter, data tlsConfig) {
+func marshalTLS(w http.ResponseWriter, r *http.Request, data tlsConfig) {
 	w.Header().Set("Content-Type", "application/json")
 	if data.CertificateChain != "" {
@ -610,8 +661,13 @@ func marshalTLS(w http.ResponseWriter, data tlsConfig) {
 	err := json.NewEncoder(w).Encode(data)
 	if err != nil {
-		httpError(w, http.StatusInternalServerError, "Failed to marshal json with TLS status: %s", err)
+		aghhttp.Error(
-		return
+			r,
 			w,
 			http.StatusInternalServerError,
 			"Failed to marshal json with TLS status: %s",
 			err,
 		)
 	}
 }
--- a/internal/home/web.go
+++ b/internal/home/web.go
@ -114,17 +114,8 @@ func CreateWeb(conf *webConfig) *Web {
 // WebCheckPortAvailable - check if port is available
 // BUT: if we are already using this port, no need
 func WebCheckPortAvailable(port int) bool {
-	alreadyRunning := false
+	return Context.web.httpsServer.server != nil ||
-	if Context.web.httpsServer.server != nil {
+		aghnet.CheckPort("tcp", config.BindHost, port) == nil
 		alreadyRunning = true
 	}
 	if !alreadyRunning {
 		err := aghnet.CheckPortAvailable(config.BindHost, port)
 		if err != nil {
 			return false
 		}
 	}
 	return true
 }
 // TLSConfigChanged updates the TLS configuration and restarts the HTTPS server
--- a/internal/querylog/http.go
+++ b/internal/querylog/http.go
@ -10,6 +10,7 @@ import (
 	"strings"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/golibs/jsonutil"
 	"github.com/AdguardTeam/golibs/log"
 	"github.com/AdguardTeam/golibs/stringutil"
@ -33,18 +34,11 @@ func (l *queryLog) initWeb() {
 	l.conf.HTTPRegister(http.MethodPost, "/control/querylog_config", l.handleQueryLogConfig)
 }
 func httpError(r *http.Request, w http.ResponseWriter, code int, format string, args ...interface{}) {
 	text := fmt.Sprintf(format, args...)
 	log.Info("QueryLog: %s %s: %s", r.Method, r.URL, text)
 	http.Error(w, text, code)
 }
 func (l *queryLog) handleQueryLog(w http.ResponseWriter, r *http.Request) {
 	params, err := l.parseSearchParams(r)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "failed to parse params: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "failed to parse params: %s", err)
 		return
 	}
@ -56,14 +50,21 @@ func (l *queryLog) handleQueryLog(w http.ResponseWriter, r *http.Request) {
 	jsonVal, err := json.Marshal(data)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "Couldn't marshal data into json: %s", err)
+		aghhttp.Error(
 			r,
 			w,
 			http.StatusInternalServerError,
 			"Couldn't marshal data into json: %s",
 			err,
 		)
 		return
 	}
 	w.Header().Set("Content-Type", "application/json")
 	_, err = w.Write(jsonVal)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "Unable to write response json: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "Unable to write response json: %s", err)
 	}
 }
@ -80,13 +81,15 @@ func (l *queryLog) handleQueryLogInfo(w http.ResponseWriter, r *http.Request) {
 	jsonVal, err := json.Marshal(resp)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "json encode: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "json encode: %s", err)
 		return
 	}
 	w.Header().Set("Content-Type", "application/json")
 	_, err = w.Write(jsonVal)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "http write: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "http write: %s", err)
 	}
 }
@ -109,13 +112,15 @@ func (l *queryLog) handleQueryLogConfig(w http.ResponseWriter, r *http.Request)
 	d := &qlogConfig{}
 	req, err := jsonutil.DecodeObject(d, r.Body)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "%s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "%s", err)
 		return
 	}
 	ivl := time.Duration(float64(timeutil.Day) * d.Interval)
 	if req.Exists("interval") && !checkInterval(ivl) {
-		httpError(r, w, http.StatusBadRequest, "Unsupported interval")
+		aghhttp.Error(r, w, http.StatusBadRequest, "Unsupported interval")
 		return
 	}
--- a/internal/stats/http.go
+++ b/internal/stats/http.go
@ -4,21 +4,13 @@ package stats
 import (
 	"encoding/json"
 	"fmt"
 	"net/http"
 	"time"
 	"github.com/AdguardTeam/AdGuardHome/internal/aghhttp"
 	"github.com/AdguardTeam/golibs/log"
 )
 func httpError(r *http.Request, w http.ResponseWriter, code int, format string, args ...interface{}) {
 	text := fmt.Sprintf(format, args...)
 	log.Info("Stats: %s %s: %s", r.Method, r.URL, text)
 	http.Error(w, text, code)
 }
 // topAddrs is an alias for the types of the TopFoo fields of statsResponse.
 // The key is either a client's address or a requested address.
 type topAddrs = map[string]uint64
@ -71,7 +63,7 @@ func (s *statsCtx) handleStats(w http.ResponseWriter, r *http.Request) {
 		log.Debug("stats: prepared data in %v", time.Since(start))
 		if !ok {
-			httpError(r, w, http.StatusInternalServerError, "Couldn't get statistics data")
+			aghhttp.Error(r, w, http.StatusInternalServerError, "Couldn't get statistics data")
 			return
 		}
@ -81,7 +73,7 @@ func (s *statsCtx) handleStats(w http.ResponseWriter, r *http.Request) {
 	err := json.NewEncoder(w).Encode(resp)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "json encode: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "json encode: %s", err)
 		return
 	}
@ -98,13 +90,14 @@ func (s *statsCtx) handleStatsInfo(w http.ResponseWriter, r *http.Request) {
 	data, err := json.Marshal(resp)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "json encode: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "json encode: %s", err)
 		return
 	}
 	w.Header().Set("Content-Type", "application/json")
 	_, err = w.Write(data)
 	if err != nil {
-		httpError(r, w, http.StatusInternalServerError, "http write: %s", err)
+		aghhttp.Error(r, w, http.StatusInternalServerError, "http write: %s", err)
 	}
 }
@ -113,12 +106,14 @@ func (s *statsCtx) handleStatsConfig(w http.ResponseWriter, r *http.Request) {
 	reqData := config{}
 	err := json.NewDecoder(r.Body).Decode(&reqData)
 	if err != nil {
-		httpError(r, w, http.StatusBadRequest, "json decode: %s", err)
+		aghhttp.Error(r, w, http.StatusBadRequest, "json decode: %s", err)
 		return
 	}
 	if !checkInterval(reqData.IntervalDays) {
-		httpError(r, w, http.StatusBadRequest, "Unsupported interval")
+		aghhttp.Error(r, w, http.StatusBadRequest, "Unsupported interval")
 		return
 	}
--- a/internal/tools/go.mod
+++ b/internal/tools/go.mod
@ -1,21 +1,32 @@
 module github.com/AdguardTeam/AdGuardHome/internal/tools
-go 1.16
+go 1.17
 require (
-	github.com/fzipp/gocyclo v0.3.1
+	github.com/fzipp/gocyclo v0.4.0
 	github.com/golangci/misspell v0.3.5
-	github.com/google/go-cmp v0.5.5 // indirect
+	github.com/gordonklaus/ineffassign v0.0.0-20210914165742-4cc7213b9bc8
 	github.com/gookit/color v1.4.2 // indirect
 	github.com/gordonklaus/ineffassign v0.0.0-20210225214923-2e10b2664254
 	github.com/kisielk/errcheck v1.6.0
 	github.com/kyoh86/looppointer v0.1.7
-	github.com/kyoh86/nolint v0.0.1 // indirect
+	github.com/securego/gosec/v2 v2.9.5
 	github.com/securego/gosec/v2 v2.7.0
 	golang.org/x/lint v0.0.0-20210508222113-6edffad5e616
-	golang.org/x/sys v0.0.0-20210514084401-e8d321eab015 // indirect
+	golang.org/x/tools v0.1.8
-	golang.org/x/tools v0.1.1
+	honnef.co/go/tools v0.2.2
-	honnef.co/go/tools v0.1.4
+	mvdan.cc/gofumpt v0.2.1
-	mvdan.cc/gofumpt v0.1.1
+	mvdan.cc/unparam v0.0.0-20211214103731-d0ef000c54e5
-	mvdan.cc/unparam v0.0.0-20210104141923-aac4ce9116a7
+)
 require (
 	github.com/BurntSushi/toml v0.4.1 // indirect
 	github.com/client9/misspell v0.3.4 // indirect
 	github.com/google/go-cmp v0.5.6 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/gookit/color v1.5.0 // indirect
 	github.com/kyoh86/nolint v0.0.1 // indirect
 	github.com/nbutton23/zxcvbn-go v0.0.0-20210217022336-fa2cb2858354 // indirect
 	github.com/xo/terminfo v0.0.0-20210125001918-ca9a967f8778 // indirect
 	golang.org/x/mod v0.5.1 // indirect
 	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
--- a/internal/tools/go.sum
+++ b/internal/tools/go.sum
@ -33,8 +33,9 @@ cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohl
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 contrib.go.opencensus.io/exporter/stackdriver v0.13.4/go.mod h1:aXENhDJ1Y4lIg4EUaVTwzvYETVNZk10Pu26tevFKLUc=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/toml v0.4.1 h1:GaI7EiDXDRfa8VshkTj7Fym7ha+y8/XxIgD2okUIjLw=
 github.com/BurntSushi/toml v0.4.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/Masterminds/goutils v1.1.0/go.mod h1:8cTjp+g8YejhMuvIA5y2vz3BpJxksy863GQaJW2MFNU=
 github.com/Masterminds/semver v1.4.2/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
@ -76,6 +77,7 @@ github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwc
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v0.0.0-20161028175848-04cdfd42973b/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@ -90,12 +92,14 @@ github.com/envoyproxy/protoc-gen-validate v0.0.14/go.mod h1:iSmxcyjqTsJpI2R4NaDN
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fatih/color v1.10.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
 github.com/frankban/quicktest v1.14.0 h1:+cqqvzZV87b4adx/5ayVOaYZ2CrvM4ejQvUdBzPPUss=
 github.com/frankban/quicktest v1.14.0/go.mod h1:NeW+ay9A/U67EYXNFA1nPE8e/tnQv/09mUdL/ijj8og=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/fullstorydev/grpcurl v1.6.0/go.mod h1:ZQ+ayqbKMJNhzLmbpCiurTVlaK2M/3nqZCxaQ2Ze/sM=
-github.com/fzipp/gocyclo v0.3.1 h1:A9UeX3HJSXTBzvHzhqoYVuE0eAhe+aM8XBCCwsPMZOc=
+github.com/fzipp/gocyclo v0.4.0 h1:IykTnjwh2YLyYkGa0y92iTTEQcnyAz0r9zOo15EbJ7k=
-github.com/fzipp/gocyclo v0.3.1/go.mod h1:DJHO6AUmbdqj2ET4Z9iArSuwWgYDRryYt2wASxc7x3E=
+github.com/fzipp/gocyclo v0.4.0/go.mod h1:rXPyn8fnlpa0R2csP/31uerbiVBugk5whMdlyaLkLoA=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
@ -107,6 +111,7 @@ github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V
 github.com/go-redis/redis v6.15.8+incompatible/go.mod h1:NAIEuMOZ/fxfXJIrKDQDz8wamY7mA7PouImQ2Jvg6kA=
 github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0/go.mod h1:fyg7847qk6SyHyPtNmDHnmrv/HOrqktSC+C9fM+CJOE=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
 github.com/gogo/protobuf v1.3.0/go.mod h1:SlYgWuQ5SjCEi6WLHjHCa1yvBfUnHcTbrrZtXPKa29o=
@ -137,6 +142,8 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
 github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
 github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/golangci/misspell v0.3.5 h1:pLzmVdl3VxTOncgzHcvLOKirdvcx/TydsClUQXTehjo=
 github.com/golangci/misspell v0.3.5/go.mod h1:dEbvlSfYbMQDtrpRMQU675gSDLDNa8sCPPChZ7PhiVA=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
@ -149,9 +156,9 @@ github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMyw
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ=
 github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
 github.com/google/martian v2.1.0+incompatible/go.mod h1:9I4somxYTbIHy5NJKHRl3wXiIaQGbYVAs8BPL6v8lEs=
 github.com/google/pprof v0.0.0-20181206194817-3ea8567a2e57/go.mod h1:zfwlbNMJ+OItoe0UupaVj+oy1omPYYDuagoSzA8v9mc=
@ -166,14 +173,15 @@ github.com/google/trillian v1.3.11/go.mod h1:0tPraVHrSDkA3BO6vKX67zgLXs6SsOAbHEi
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@ -217,11 +225,13 @@ github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+o
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@ -231,6 +241,7 @@ github.com/kyoh86/nolint v0.0.1/go.mod h1:1ZiZZ7qqrZ9dZegU96phwVcdQOMKIqRzFJL3ew
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@ -257,7 +268,7 @@ github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lN
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-github.com/mozilla/tls-observatory v0.0.0-20210209181001-cf43108d6880/go.mod h1:FUqVoUPHSEdDR0MnFM3Dh8AU0pZHLXUD127SAJGER/s=
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@ -273,15 +284,18 @@ github.com/olekukonko/tablewriter v0.0.2/go.mod h1:rSAaSIOAGT9odnlyGlUfAJaoc5w2f
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@ -305,13 +319,14 @@ github.com/pseudomuto/protokit v0.2.0/go.mod h1:2PdH30hxVHsup8KpBTOXTBeMVhJZVio3
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
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@ -334,8 +349,10 @@ github.com/stretchr/testify v1.1.4/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
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@ -356,6 +373,7 @@ github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
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@ -383,7 +401,7 @@ golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
-golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
+golang.org/x/crypto v0.0.0-20211209193657-4570a0811e8b/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
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@ -417,10 +435,9 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
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 golang.org/x/mod v0.4.1/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.5.1 h1:OJxoQ/rynoF0dcCdI7cLPktw/hR2cueqYfjm43oqK38=
 golang.org/x/mod v0.5.1/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@ -456,10 +473,11 @@ golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81R
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4 h1:4nGaVu0QrbjT/AK2PRLuQfQuh6DJve+pELhqTdAj3x0=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210428140749-89ef3d95e781/go.mod h1:OJAsFXCWl8Ukc7SiCT/9KSuxbyM7479/AVlXFRxuMCk=
 golang.org/x/net v0.0.0-20211015210444-4f30a5c0130f/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 h1:CIJ76btIcR3eFI5EgSo6k1qKw9KJexJuRLI9G7Hp5wE=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@ -522,11 +540,14 @@ golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210228012217-479acdf4ea46/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210514084401-e8d321eab015 h1:hZR0X1kPW+nwyJ9xRxqZk1vx5RUObAPBdKVvXPDUH/E=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210514084401-e8d321eab015/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211019181941-9d821ace8654/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211213223007-03aa0b5f6827/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e h1:fLOSk5Q00efkSvAm+4xcoXD+RRmLmmulPn5I3Y9F2EM=
 golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@ -534,8 +555,9 @@ golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.5 h1:i6eZZ+zk0SOf0xgBpEpPD18qWcJda6q1sxt3S0kzyUQ=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@ -591,11 +613,10 @@ golang.org/x/tools v0.0.0-20200706234117-b22de6825cf7/go.mod h1:njjCfa9FT2d7l9Bc
 golang.org/x/tools v0.0.0-20200710042808-f1c4188a97a1/go.mod h1:njjCfa9FT2d7l9Bc6FUM5FLjQPp3cFF28FI3qnDFljA=
 golang.org/x/tools v0.0.0-20201007032633-0806396f153e/go.mod h1:z6u4i615ZeAfBE4XtMziQW1fSVJXACjjbWkB/mvPzlU=
 golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20210101214203-2dba1e4ea05c/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20210104081019-d8d6ddbec6ee/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
-golang.org/x/tools v0.1.1 h1:wGiQel/hW0NnEkJUk8lbzkX2gFJU6PFxf1v5OlCfuOs=
+golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
-golang.org/x/tools v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
+golang.org/x/tools v0.1.8 h1:P1HhGGuLW4aAclzjtmJdf0mJOjVUZUzOTqkAkWL+l6w=
 golang.org/x/tools v0.1.8/go.mod h1:nABZi5QlRsZVlzPpHl034qft6wpY4eDcsTt5AaioBiU=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@ -679,6 +700,8 @@ google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@ -714,12 +737,12 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-honnef.co/go/tools v0.1.4 h1:SadWOkti5uVN1FAMgxn165+Mw00fuQKyk4Gyn/inxNQ=
+honnef.co/go/tools v0.2.2 h1:MNh1AVMyVX23VUHE2O27jm6lNj3vjO5DexS4A1xvnzk=
-honnef.co/go/tools v0.1.4/go.mod h1:NgwopIslSNH47DimFoV78dnkksY2EFtX0ajyb3K/las=
+honnef.co/go/tools v0.2.2/go.mod h1:lPVVZ2BS5TfnjLyizF7o7hv7j9/L+8cZY2hLyjP9cGY=
-mvdan.cc/gofumpt v0.1.1 h1:bi/1aS/5W00E2ny5q65w9SnKpWEF/UIOqDYBILpo9rA=
+mvdan.cc/gofumpt v0.2.1 h1:7jakRGkQcLAJdT+C8Bwc9d0BANkVPSkHZkzNv07pJAs=
-mvdan.cc/gofumpt v0.1.1/go.mod h1:yXG1r1WqZVKWbVRtBWKWX9+CxGYfA51nSomhM0woR48=
+mvdan.cc/gofumpt v0.2.1/go.mod h1:a/rvZPhsNaedOJBzqRD9omnwVwHZsBdJirXHa9Gh9Ig=
-mvdan.cc/unparam v0.0.0-20210104141923-aac4ce9116a7 h1:HT3e4Krq+IE44tiN36RvVEb6tvqeIdtsVSsxmNPqlFU=
+mvdan.cc/unparam v0.0.0-20211214103731-d0ef000c54e5 h1:Jh3LAeMt1eGpxomyu3jVkmVZWW2MxZ1qIIV2TZ/nRio=
-mvdan.cc/unparam v0.0.0-20210104141923-aac4ce9116a7/go.mod h1:hBpJkZE8H/sb+VRFvw2+rBpHNsTBcvSpk61hr8mzXZE=
+mvdan.cc/unparam v0.0.0-20211214103731-d0ef000c54e5/go.mod h1:b8RRCBm0eeiWR8cfN88xeq2G5SG3VKGO+5UPWi5FSOY=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
--- a/main.go
+++ b/main.go
@ -6,6 +6,10 @@ import (
 	"github.com/AdguardTeam/AdGuardHome/internal/home"
 )
 // Embed the prebuilt client here since we strive to keep .go files inside the
 // internal directory and the embed package is unable to embed files located
 // outside of the same or underlying directory.
 //go:embed build build2
 var clientBuildFS embed.FS
--- a/scripts/make/build-release.sh
+++ b/scripts/make/build-release.sh
@ -159,7 +159,8 @@ linux    ppc64le   0   0          0
 openbsd  amd64     0   0          0
 openbsd  arm64     0   0          0
 windows  386       0   0          0
-windows  amd64     0   0          0"
+windows  amd64     0   0          0
 windows  arm64     0   0          0"
 readonly platforms
 # Function build builds the release for one platform.  It builds a binary, an
--- a/scripts/make/go-lint.sh
+++ b/scripts/make/go-lint.sh
@ -52,7 +52,7 @@ trap not_found EXIT
 go_version="$( "$GO" version )"
 readonly go_version
-go_min_version='go1.16'
+go_min_version='go1.17'
 go_version_msg="
 warning: your go version (${go_version}) is different from the recommended minimal one (${go_min_version}).
 if you have the version installed, please set the GO environment variable.
@ -193,7 +193,7 @@ exit_on_output method_const
 exit_on_output underscores
-exit_on_output gofumpt --extra -l -s .
+exit_on_output gofumpt --extra -e -l .
 golint --set_exit_status ./...
--- a/scripts/make/go-test.sh
+++ b/scripts/make/go-test.sh
@ -35,10 +35,13 @@ fi
 readonly race_flags
 go="${GO:-go}"
 readonly go
 count_flags='--count=1'
 cover_flags='--coverprofile=./coverage.txt'
 shuffle_flags='--shuffle=on'
 timeout_flags="${TIMEOUT_FLAGS:---timeout=30s}"
-readonly go timeout_flags cover_flags count_flags
+readonly count_flags cover_flags shuffle_flags timeout_flags
-"$go" test "$count_flags" "$cover_flags" "$race_flags" "$timeout_flags" "$x_flags" "$v_flags" ./...
+"$go" test "$count_flags" "$cover_flags" "$race_flags" "$shuffle_flags" "$timeout_flags"\
 	"$x_flags" "$v_flags" ./...
--- a/scripts/snap/snap.tmpl.yaml
+++ b/scripts/snap/snap.tmpl.yaml
@ -29,6 +29,11 @@
    # (cap_net_bind_service) and also to bind to a particular interface using
    # SO_BINDTODEVICE (cap_net_raw).
    - 'network-observe'
    # Add the "network-control" plug to be able to use raw sockets in the DHCP
    # server.
    #
    # TODO(a.garipov): If this works, request auto-connect of this plug.
    - 'network-control'
    'daemon': 'simple'
    'restart-condition': 'always'
  'adguard-home-web':