def sniff(count=0, store=1, offline=None, prn = None, lfilter=None, L2socket=None, timeout=None, *arg, **karg):
    """Sniff packets
sniff([count=0,] [prn=None,] [store=1,] [offline=None,] [lfilter=None,] + L2ListenSocket args) -> list of packets
Select interface to sniff by setting conf.iface. Use show_interfaces() to see interface names.
  count: number of packets to capture. 0 means infinity
  store: wether to store sniffed packets or discard them
    prn: function to apply to each packet. If something is returned,
         it is displayed. Ex:
         ex: prn = lambda x: x.summary()
lfilter: python function applied to each packet to determine
         if further action may be done
         ex: lfilter = lambda x: x.haslayer(Padding)
offline: pcap file to read packets from, instead of sniffing them
timeout: stop sniffing after a given time (default: None)
L2socket: use the provided L2socket
    """
    c = 0

    if offline is None:
        log_runtime.info('Sniffing on %s' % conf.iface)
        if L2socket is None:
            L2socket = conf.L2listen
        s = L2socket(type=ETH_P_ALL, *arg, **karg)
    else:
        s = PcapReader(offline)

    lst = []
    if timeout is not None:
        stoptime = time.time()+timeout
    remain = None
    while 1:
        try:
            if timeout is not None:
                remain = stoptime-time.time()
                if remain <= 0:
                    break

            try:
                p = s.recv(MTU)
            except PcapTimeoutElapsed:
                continue
            if p is None:
                break
            if lfilter and not lfilter(p):
                continue
            if store:
                lst.append(p)
            c += 1
            if prn:
                r = prn(p)
                if r is not None:
                    print(r)
            if count > 0 and c >= count:
                break
        except __HOLE__:
            break
    s.close()
    return plist.PacketList(lst,"Sniffed")
dataset/ETHPy150Open phaethon/scapy/scapy/arch/windows/__init__.py/sniff