Pull request: 5251-close-ups

Merge in DNS/adguard-home from 5251-close-ups to master

Updates #5251.

Squashed commit of the following:

commit 98a4a9a45ae702df3cf26cab0b28bd83a6556085
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Dec 14 18:31:17 2022 +0300

    all: log changes better

commit af25803925c15ba2d9b07865c3deb58033006c52
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Dec 14 18:24:42 2022 +0300

    all: log changes

commit 65bb12d8b6d6bd2e37ee83bc4aca63aa573da63a
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Dec 14 18:15:41 2022 +0300

    all: upd dnsproxy

commit 24039cd7f9c64ee5d9806e1146dbd1e76c298a20
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Dec 14 17:19:15 2022 +0300

    dnsforward: imp code, docs

commit a40bbd55267c9904c14b89568408f86ccb3ef6c9
Author: Eugene Burkov <E.Burkov@AdGuard.COM>
Date:   Wed Dec 14 16:43:10 2022 +0300

    dnsforward: log errs instead of return

CHANGELOG.md

@@ -34,7 +34,13 @@ See also the [v0.107.21 GitHub milestone][ms-v0.107.21].
   to update the URLs to the new ones.  Custom filters added by users themselves
   do not require re-adding.
 
+### Fixed
+
+- Errors popping up during updates of settings, which could sometimes cause the
+  server to stop responding ([#5251]).
+
 [#5238]: https://github.com/AdguardTeam/AdGuardHome/issues/5238
+[#5251]: https://github.com/AdguardTeam/AdGuardHome/issues/5251
 
 
 

go.mod

@@ -3,7 +3,7 @@ module github.com/AdguardTeam/AdGuardHome
 go 1.18
 
 require (
-	github.com/AdguardTeam/dnsproxy v0.46.4
+	github.com/AdguardTeam/dnsproxy v0.46.5
 	github.com/AdguardTeam/golibs v0.11.3
 	github.com/AdguardTeam/urlfilter v0.16.0
 	github.com/NYTimes/gziphandler v1.1.1
@@ -30,8 +30,8 @@ require (
 	go.etcd.io/bbolt v1.3.6
 	golang.org/x/crypto v0.1.0
 	golang.org/x/exp v0.0.0-20221106115401-f9659909a136
-	golang.org/x/net v0.1.0
+	golang.org/x/net v0.4.0
-	golang.org/x/sys v0.2.0
+	golang.org/x/sys v0.3.0
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
 	gopkg.in/yaml.v3 v3.0.1
 	howett.net/plist v1.0.0
@@ -61,6 +61,6 @@ require (
 	github.com/u-root/uio v0.0.0-20220204230159-dac05f7d2cb4 // indirect
 	golang.org/x/mod v0.6.0 // indirect
 	golang.org/x/sync v0.1.0 // indirect
-	golang.org/x/text v0.4.0 // indirect
+	golang.org/x/text v0.5.0 // indirect
 	golang.org/x/tools v0.2.0 // indirect
 )

go.sum

@@ -1,5 +1,5 @@
-github.com/AdguardTeam/dnsproxy v0.46.4 h1:/+wnTG0q2TkGQyA1PeSsjv4/f5ZprGduKPSoOcG+rOU=
+github.com/AdguardTeam/dnsproxy v0.46.5 h1:TiJZhwaIDDaKkqEfJ9AD9aroFjcHN8oEbKB8WfTjSIs=
-github.com/AdguardTeam/dnsproxy v0.46.4/go.mod h1:yYDMAH6ay2PxLcLtfVM3FUiyv/U9B/zYO+cIIssuJNU=
+github.com/AdguardTeam/dnsproxy v0.46.5/go.mod h1:yKBVgFlE6CqTQtye++3e7SATaMPc4Ixij+KkHsM6HhM=
 github.com/AdguardTeam/golibs v0.4.0/go.mod h1:skKsDKIBB7kkFflLJBpfGX+G8QFTx0WKUzB6TIgtUj4=
 github.com/AdguardTeam/golibs v0.10.4/go.mod h1:rSfQRGHIdgfxriDDNgNJ7HmE5zRoURq8R+VdR81Zuzw=
 github.com/AdguardTeam/golibs v0.11.3 h1:Oif+REq2WLycQ2Xm3ZPmJdfftptss0HbGWbxdFaC310=
@@ -187,8 +187,8 @@ golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96b
 golang.org/x/net v0.0.0-20210726213435-c6fcb2dbf985/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20210929193557-e81a3d93ecf6/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220923203811-8be639271d50/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
-golang.org/x/net v0.1.0 h1:hZ/3BUoy5aId7sCpA/Tc5lt8DkFgdVS2onTpJsZ/fl0=
+golang.org/x/net v0.4.0 h1:Q5QPcMlvfxFTAPV0+07Xz/MpK9NTXu2VDUuy0FeMfaU=
-golang.org/x/net v0.1.0/go.mod h1:Cx3nUiGt4eDBEyega/BKRp+/AlGL8hYe7U9odMt2Cco=
+golang.org/x/net v0.4.0/go.mod h1:MBQ8lrhLObU/6UmLb4fmbmk5OcyYmqtbGd/9yIeKjEE=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220923202941-7f9b1623fab7/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -228,8 +228,8 @@ golang.org/x/sys v0.0.0-20220209214540-3681064d5158/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220319134239-a9b59b0215f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220908164124-27713097b956/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
+golang.org/x/sys v0.3.0 h1:w8ZOecv6NaNa/zC8944JTU3vz4u6Lagfk4RPQxv92NQ=
-golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
@@ -237,8 +237,8 @@ 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 v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
-golang.org/x/text v0.4.0 h1:BrVqGRd7+k1DiOgtnFvAkoQEWQvBc25ouMJM6429SFg=
+golang.org/x/text v0.5.0 h1:OLmvp0KP+FVG99Ct/qFiL/Fhk4zp4QQnZ7b2U+5piUM=
-golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
+golang.org/x/text v0.5.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=

internal/dnsforward/dnsforward.go

@@ -570,46 +570,32 @@ func (s *Server) Stop() error {
 
 // stopLocked stops the DNS server without locking.  For internal use only.
 func (s *Server) stopLocked() (err error) {
+	// TODO(e.burkov, a.garipov):  Return critical errors, not just log them.
+	// This will require filtering all the non-critical errors in
+	// [upstream.Upstream] implementations.
+
 	if s.dnsProxy != nil {
 		err = s.dnsProxy.Stop()
 		if err != nil {
-			return fmt.Errorf("closing primary resolvers: %w", err)
+			log.Error("dnsforward: closing primary resolvers: %s", err)
 		}
 	}
 
-	var errs []error
-
 	if upsConf := s.internalProxy.UpstreamConfig; upsConf != nil {
-		const action = "closing internal resolvers"
-
 		err = upsConf.Close()
 		if err != nil {
-			if errors.Is(err, net.ErrClosed) {
+			log.Error("dnsforward: closing internal resolvers: %s", err)
-				log.Debug("dnsforward: %s: %s", action, err)
-			} else {
-				errs = append(errs, fmt.Errorf("%s: %w", action, err))
-			}
 		}
 	}
 
 	if upsConf := s.localResolvers.UpstreamConfig; upsConf != nil {
-		const action = "closing local resolvers"
-
 		err = upsConf.Close()
 		if err != nil {
-			if errors.Is(err, net.ErrClosed) {
+			log.Error("dnsforward: closing local resolvers: %s", err)
-				log.Debug("dnsforward: %s: %s", action, err)
-			} else {
-				errs = append(errs, fmt.Errorf("%s: %w", action, err))
-			}
 		}
 	}
 
-	if len(errs) > 0 {
-		return errors.List("stopping dns server", errs...)
-	} else {
 	s.isRunning = false
-	}
 
 	return nil
 }