update go.mod

go.mod

@@ -1,6 +1,6 @@
 module b612.me/bcap
 
-go 1.22.4
+go 1.20
 
 require (
 	github.com/florianl/go-nfqueue/v2 v2.0.0

libpcap/libpcap.go

@@ -17,6 +17,10 @@ type NetCatch struct {
 	stopFn context.CancelFunc
 }
 
+func (n *NetCatch) Recall() func(gopacket.Packet) {
+	return n.fn
+}
+
 func (n *NetCatch) SetRecall(fn func(p gopacket.Packet)) {
 	n.fn = fn
 }
@@ -60,6 +64,7 @@ func NewCatchEth(eth string, sentence string) (*NetCatch, error) {
 	nc := new(NetCatch)
 	nc.eth = eth
 	nc.sentence = sentence
+	nc.ctx, nc.stopFn = context.WithCancel(context.Background())
 	return nc, nil
 }
 

nfq/nfqueue.go

@@ -17,6 +17,10 @@ type NfQueue struct {
 	recallFn func(id uint32, q *nfqueue.Nfqueue, p Packet)
 }
 
+func (n *NfQueue) RecallFn() func(id uint32, q *nfqueue.Nfqueue, p Packet) {
+	return n.recallFn
+}
+
 type Packet struct {
 	Packet gopacket.Packet
 	Attr   nfqueue.Attribute