all: imp docs

internal/filtering/filtering.go

@@ -86,6 +86,7 @@ type Config struct {
 
 	// ApplyClientFiltering retrieves persistent client information using the
 	// ClientID or client IP address, and applies it to the filtering settings.
+	// It must not be nil.
 	ApplyClientFiltering func(clientID string, cliAddr netip.Addr, setts *Settings) `yaml:"-"`
 
 	// BlockedServices is the configuration of blocked services.

internal/filtering/http.go

@@ -522,11 +522,11 @@ func stringToDNSType(str string) (qtype uint16, err error) {
 	}
 
 	val, err := strconv.ParseUint(str[len(typePref):], 10, 16)
-	if err == nil {
-		return uint16(val), nil
+	if err != nil {
+		return 0, errors.ErrBadEnumValue
 	}
 
-	return 0, errors.ErrBadEnumValue
+	return uint16(val), nil
 }
 
 // setProtectedBool sets the value of a boolean pointer under a lock.  l must

openapi/openapi.yaml

@@ -740,7 +740,7 @@
         'in': 'query'
         'description': 'Filter by host name'
         'required': true
-        'example': 'client_name'
+        'example': 'google.com'
         'schema':
           'type': 'string'
       - 'name': 'client'