add macos pacp

capture/pacp_macos.go

@@ -0,0 +1,25 @@
+// +build darwin
+
+package capture
+
+import (
+	"fmt"
+
+	"github.com/google/gopacket/pcap"
+)
+
+// in online use, we found a strange bug: pcap cost 100% core CPU and memory increase along
+func initEthernetHandlerFromPacp() (handler PcapHandler) {
+	pcapHandler, err := pcap.OpenLive(DeviceName, 65536, false, pcap.BlockForever)
+	if err != nil {
+		panic(fmt.Sprintf("cannot open network interface %s <-- %s", DeviceName, err.Error()))
+	}
+
+	err = pcapHandler.SetBPFFilter(fmt.Sprintf("tcp and (port %d)", snifferPort))
+	if err != nil {
+		panic(err.Error())
+	}
+
+	handler = pcapHandler
+	return
+}