// NewRing creates a new PFRing. Note that when the ring is initially created,
// it is disabled. The caller must call Enable to start receiving packets.
// The caller should call Close on the given ring when finished with it.
func NewRing(device string, snaplen uint32, flags Flag) (ring *Ring, _ error) {
dev := C.CString(device)
defer C.free(unsafe.Pointer(dev))
cptr, err := C.pfring_open(dev, C.u_int32_t(snaplen), C.u_int32_t(flags))
if cptr == nil || err != nil {
return nil, fmt.Errorf("pfring NewRing error: %v", err)
}
ring = &Ring{cptr: cptr, snaplen: int(snaplen)}
ring.SetApplicationName(os.Args[0])
return
}
// NewRing creates a new PFRing. Note that when the ring is initially created,
// it is disabled. The caller must call Enable to start receiving packets.
// The caller should call Close on the given ring when finished with it.
func NewRing(device string, snaplen uint32, flags Flag) (ring *Ring, _ error) {
dev := C.CString(device)
defer C.free(unsafe.Pointer(dev))
cptr, err := C.pfring_open(dev, C.u_int32_t(snaplen), C.u_int32_t(flags))
if cptr == nil || err != nil {
return nil, fmt.Errorf("pfring NewRing error: %v", err)
}
ring = &Ring{cptr: cptr, snaplen: int(snaplen)}
if flags&FlagLongHeader == FlagLongHeader {
ring.useExtendedPacketHeader = true
} else {
ifc, err := net.InterfaceByName(device)
if err == nil {
ring.interfaceIndex = ifc.Index
}
}
ring.SetApplicationName(os.Args[0])
return
}