Add prometheus

stats/stream_info.go

@@ -0,0 +1,19 @@
+package stats
+
+import (
+	"net"
+	"time"
+)
+
+type streamInfo struct {
+	createdAt time.Time
+	clientIP  net.IP
+}
+
+func (s *streamInfo) IPType() string {
+	if s.clientIP.To4() == nil {
+		return TagIPTypeIPv6
+	}
+
+	return TagIPTypeIPv4
+}