First Commmit

route/rule/rule_item_response_rcode.go

@@ -0,0 +1,26 @@
+package rule
+
+import (
+	"github.com/sagernet/sing-box/adapter"
+	F "github.com/sagernet/sing/common/format"
+
+	"github.com/miekg/dns"
+)
+
+var _ RuleItem = (*DNSResponseRCodeItem)(nil)
+
+type DNSResponseRCodeItem struct {
+	rcode int
+}
+
+func NewDNSResponseRCodeItem(rcode int) *DNSResponseRCodeItem {
+	return &DNSResponseRCodeItem{rcode: rcode}
+}
+
+func (r *DNSResponseRCodeItem) Match(metadata *adapter.InboundContext) bool {
+	return metadata.DNSResponse != nil && metadata.DNSResponse.Rcode == r.rcode
+}
+
+func (r *DNSResponseRCodeItem) String() string {
+	return F.ToString("response_rcode=", dns.RcodeToString[r.rcode])
+}