chore: support IN-PORT rule

constant/adapters.go

@@ -202,3 +202,7 @@ type UDPPacket interface {
 	// LocalAddr returns the source IP/Port of packet
 	LocalAddr() net.Addr
 }
+
+type UDPPacketInAddr interface {
+	InAddr() net.Addr
+}

constant/metadata.go

@@ -115,6 +115,8 @@ type Metadata struct {
 	DstIP       netip.Addr `json:"destinationIP"`
 	SrcPort     string     `json:"sourcePort"`
 	DstPort     string     `json:"destinationPort"`
+	InIP        netip.Addr `json:"inboundIP"`
+	InPort      string     `json:"inboundPort"`
 	Host        string     `json:"host"`
 	DNSMode     DNSMode    `json:"dnsMode"`
 	Uid         *int32     `json:"uid"`

constant/rule.go

@@ -13,6 +13,7 @@ const (
 	SrcIPSuffix
 	SrcPort
 	DstPort
+	InPort
 	Process
 	ProcessPath
 	RuleSet
@@ -52,6 +53,8 @@ func (rt RuleType) String() string {
 		return "SrcPort"
 	case DstPort:
 		return "DstPort"
+	case InPort:
+		return "InPort"
 	case Process:
 		return "Process"
 	case ProcessPath: