From 43e5af66acb8ace71a329fe2effae6a78492d73f Mon Sep 17 00:00:00 2001
From: Eugene Burkov <e.burkov@adguard.com>
Date: Wed, 12 May 2021 18:12:03 +0300
Subject: [PATCH] all: fix client settings applying

---
 CHANGELOG.md                      |  3 ++
 internal/dnsforward/dnsforward.go |  4 +--
 internal/dnsforward/filter.go     |  2 --
 internal/home/filter.go           | 60 +++++++++++--------------------
 4 files changed, 25 insertions(+), 44 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 42aef610ea4..b1754378264 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,8 +19,11 @@ and this project adheres to
 
 ### Fixed
 
+- Ignoring client-specific filtering settings when filtering is disabled in
+  general settings ([#2875]).
 - Disallowed domains are now case-insensitive ([#3115]).
 
+[#2875]: https://github.com/AdguardTeam/AdGuardHome/issues/2875
 [#3115]: https://github.com/AdguardTeam/AdGuardHome/issues/3115
 
 
diff --git a/internal/dnsforward/dnsforward.go b/internal/dnsforward/dnsforward.go
index 6d8f8a2710b..71817c58d65 100644
--- a/internal/dnsforward/dnsforward.go
+++ b/internal/dnsforward/dnsforward.go
@@ -370,9 +370,7 @@ func (s *Server) setupResolvers(localAddrs []string) (err error) {
 	// really applicable here since in case of listening on all network
 	// interfaces we should check the whole interface's network to cut off
 	// all the loopback addresses as well.
-	localAddrs = aghstrings.FilterOut(localAddrs, func(s string) (ok bool) {
-		return ourAddrsSet.Has(s)
-	})
+	localAddrs = aghstrings.FilterOut(localAddrs, ourAddrsSet.Has)
 
 	var upsConfig proxy.UpstreamConfig
 	upsConfig, err = proxy.ParseUpstreamsConfig(localAddrs, upstream.Options{
diff --git a/internal/dnsforward/filter.go b/internal/dnsforward/filter.go
index 93a72a867a1..331bbdc1fac 100644
--- a/internal/dnsforward/filter.go
+++ b/internal/dnsforward/filter.go
@@ -50,8 +50,6 @@ func (s *Server) getClientRequestFilteringSettings(ctx *dnsContext) *dnsfilter.F
 // filtered.
 func (s *Server) filterDNSRequest(ctx *dnsContext) (*dnsfilter.Result, error) {
 	d := ctx.proxyCtx
-	// TODO(e.burkov): Consistently use req instead of d.Req since it is
-	// declared.
 	req := d.Req
 	host := strings.TrimSuffix(req.Question[0].Name, ".")
 	res, err := s.dnsFilter.CheckHost(host, req.Question[0].Qtype, ctx.setts)
diff --git a/internal/home/filter.go b/internal/home/filter.go
index 639bec459c7..ccad20cbba0 100644
--- a/internal/home/filter.go
+++ b/internal/home/filter.go
@@ -76,16 +76,6 @@ type filter struct {
 	dnsfilter.Filter `yaml:",inline"`
 }
 
-// Creates a helper object for working with the user rules
-func userFilter() filter {
-	f := filter{
-		// User filter always has constant ID=0
-		Enabled: true,
-	}
-	f.Filter.Data = []byte(strings.Join(config.UserRules, "\n"))
-	return f
-}
-
 const (
 	statusFound          = 1
 	statusEnabledChanged = 2
@@ -689,41 +679,33 @@ func (filter *filter) LastTimeUpdated() time.Time {
 }
 
 func enableFilters(async bool) {
-	var filters []dnsfilter.Filter
 	var whiteFilters []dnsfilter.Filter
-	if config.DNS.FilteringEnabled {
-		// convert array of filters
+	filters := []dnsfilter.Filter{{
+		Data: []byte(strings.Join(config.UserRules, "\n")),
+	}}
 
-		userFilter := userFilter()
-		f := dnsfilter.Filter{
-			ID:   userFilter.ID,
-			Data: userFilter.Data,
+	for _, filter := range config.Filters {
+		if !filter.Enabled {
+			continue
 		}
-		filters = append(filters, f)
 
-		for _, filter := range config.Filters {
-			if !filter.Enabled {
-				continue
-			}
-
-			f = dnsfilter.Filter{
-				ID:       filter.ID,
-				FilePath: filter.Path(),
-			}
-			filters = append(filters, f)
+		filters = append(filters, dnsfilter.Filter{
+			ID:       filter.ID,
+			FilePath: filter.Path(),
+		})
+	}
+	for _, filter := range config.WhitelistFilters {
+		if !filter.Enabled {
+			continue
 		}
-		for _, filter := range config.WhitelistFilters {
-			if !filter.Enabled {
-				continue
-			}
 
-			f = dnsfilter.Filter{
-				ID:       filter.ID,
-				FilePath: filter.Path(),
-			}
-			whiteFilters = append(whiteFilters, f)
-		}
+		whiteFilters = append(whiteFilters, dnsfilter.Filter{
+			ID:       filter.ID,
+			FilePath: filter.Path(),
+		})
 	}
 
-	_ = Context.dnsFilter.SetFilters(filters, whiteFilters, async)
+	if err := Context.dnsFilter.SetFilters(filters, whiteFilters, async); err != nil {
+		log.Debug("enabling filters: %s", err)
+	}
 }