feat: sniffer support

sniffer:
  enable: true
  force: false # Overwrite domain
  sniffing:
    - tls

constant/sniffer.go

@@ -0,0 +1,26 @@
+package constant
+
+type Sniffer interface {
+	SupportNetwork() NetWork
+	SniffTCP(bytes []byte) (string, error)
+	Protocol() string
+}
+
+const (
+	TLS SnifferType = iota
+)
+
+var (
+	SnifferList = []SnifferType{TLS}
+)
+
+type SnifferType int
+
+func (rt SnifferType) String() string {
+	switch rt {
+	case TLS:
+		return "TLS"
+	default:
+		return "Unknown"
+	}
+}