fix: configuration for FQDN only resolver (#1025)

config/config.go

@@ -178,7 +178,7 @@ type Config struct {
 	KeyFile             string                    `yaml:"keyFile"`
 	BootstrapDNS        BootstrapDNSConfig        `yaml:"bootstrapDns"`
 	HostsFile           HostsFileConfig           `yaml:"hostsFile"`
-	FqdnOnly            FqdnOnlyConfig            `yaml:",inline"`
+	FqdnOnly            FqdnOnlyConfig            `yaml:"fqdnOnly"`
 	Filtering           FilteringConfig           `yaml:"filtering"`
 	Ede                 EdeConfig                 `yaml:"ede"`
 	// Deprecated

config/config_test.go

@@ -550,6 +550,7 @@ func defaultTestFileConfig() {
 	Expect(config.Blocking.BlockTTL).Should(Equal(Duration(time.Minute)))
 	Expect(config.Blocking.RefreshPeriod).Should(Equal(Duration(2 * time.Hour)))
 	Expect(config.Filtering.QueryTypes).Should(HaveLen(2))
+	Expect(config.FqdnOnly.Enable).Should(BeTrue())
 
 	Expect(config.Caching.MaxCachingTime.IsZero()).Should(BeTrue())
 	Expect(config.Caching.MinCachingTime.IsZero()).Should(BeTrue())
@@ -580,6 +581,8 @@ func writeConfigYml(tmpDir *helpertest.TmpFolder) *helpertest.TmpFile {
 		"  queryTypes:",
 		"    - AAAA",
 		"    - A",
+		"fqdnOnly:",
+		"  enable: true",
 		"blocking:",
 		"  blackLists:",
 		"    ads:",
@@ -617,6 +620,7 @@ func writeConfigYml(tmpDir *helpertest.TmpFolder) *helpertest.TmpFile {
 		"startVerifyUpstream: false")
 }
 
+//nolint:funlen
 func writeConfigDir(tmpDir *helpertest.TmpFolder) error {
 	f1 := tmpDir.CreateStringFile("config1.yaml",
 		"upstream:",
@@ -668,6 +672,8 @@ func writeConfigDir(tmpDir *helpertest.TmpFolder) error {
 		"  singleNameOrder:",
 		"    - 2",
 		"    - 1",
+		"fqdnOnly:",
+		"  enable: true",
 		"queryLog:",
 		"  type: csv-client",
 		"  target: /opt/log",

docs/config.yml

@@ -217,6 +217,7 @@ minTlsServeVersion: 1.3
 # if https port > 0: path to cert and key file for SSL encryption. if not set, self-signed certificate will be generated
 #certFile: server.crt
 #keyFile: server.key
+
 # optional: use these DNS servers to resolve blacklist urls and upstream DNS servers. It is useful if no system DNS resolver is configured, and/or to encrypt the bootstrap queries.
 bootstrapDns:
   - tcp+udp:1.1.1.1
@@ -230,6 +231,11 @@ filtering:
   queryTypes:
     - AAAA
 
+# optional: return NXDOMAIN for queries that are not FQDNs.
+fqdnOnly:
+  # default: false
+  enable: true
+
 # optional: if path defined, use this file for query resolution (A, AAAA and rDNS). Default: empty
 hostsFile:
   # optional: Path to hosts file (e.g. /etc/hosts on Linux)

docs/configuration.md

@@ -195,7 +195,8 @@ Please be aware that by enabling it your hostname resolution will break unless e
 !!! example
 
     ```yaml
-    fqdnOnly: true
+    fqdnOnly:
+      enable: true
     ```
 
 ## Custom DNS