// NewLearner returns an IPMacLearner object bound to a particular interface.
func NewPCAP(dev string, file string) (*Pcap, error) {
ret := &Pcap{}
devC := C.CString(dev)
fileC := C.CString(file)
defer C.free(unsafe.Pointer(devC))
defer C.free(unsafe.Pointer(fileC))
handle := C.gopcapInit(devC)
if handle == nil {
return ret, fmt.Errorf("could not open device %v", dev)
}
ret.handle = unsafe.Pointer(handle)
// start pcap
dumperHandle := C.gopcapPrepare(handle, fileC)
if dumperHandle == nil {
C.gopcapClose(ret.handle, nil)
return nil, fmt.Errorf("could not open output file %v", file)
}
ret.dumperHandle = unsafe.Pointer(dumperHandle)
go C.gopcapCapture(handle, dumperHandle)
return ret, nil
}
// Stop searching for IP addresses.
func (p *Pcap) Close() {
p.lock.Lock()
defer p.lock.Unlock()
C.gopcapClose(p.handle, p.dumperHandle)
p.handle = nil
p.dumperHandle = nil
}