//export goCallBack
func goCallBack(user *C.u_char, pkthdr_ptr *C.struct_pcap_pkthdr, buf_ptr *C.u_char) {
p := (*Pcap)(unsafe.Pointer(user))
p.m.Lock()
packet := pkt.NewPacket(unsafe.Pointer(pkthdr_ptr), unsafe.Pointer(buf_ptr))
p.m.Unlock()
p.Pchan <- packet
p.pktCnt++
}
// NextEx reads the next packet and returns a success/failure indication:
//
// 1 the packet was read without problems
// 0 packets are being read from a live capture, and the timeout expired
// -1 an error occurred while reading the packet
// -2 packets are being read from a file, and there are no more packets to read
func (p *Pcap) NextEx() (*pkt.Packet, int32) {
var pkthdr_ptr *C.struct_pcap_pkthdr
var buf_ptr *C.u_char
res := int32(C.pcap_next_ex(p.cptr, &pkthdr_ptr, &buf_ptr))
if res == 1 {
p.m.Lock()
packet := pkt.NewPacket(unsafe.Pointer(pkthdr_ptr), unsafe.Pointer(buf_ptr))
p.m.Unlock()
p.pktCnt++
return packet, res
}
return nil, res
}