Geek Answers Handbook

How to tell scapy sniff () to stop if a packet is not received?

How do I tell the scapy sniff () function to stop if a packet is not received? I send packets with the sendp () function Example: when sending DHCP Discover, the response is not sent.

+4
source share
1 answer

A function sniff()in Scapy has a timeout parameter. You can provide a timeout in seconds.

You can find other options by typing sniff.__doc__.

rypeck@laptop:~$ scapy
>>> print sniff.__doc__
Sniff packets
sniff([count=0,] [prn=None,] [store=1,] [offline=None,] [lfilter=None,] + 
      L2ListenSocket args) -> list of packets

  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
opened_socket: provide an object ready to use .recv() on
stop_filter: python function applied to each packet to determine
             if we have to stop the capture after this packet
             ex: stop_filter = lambda x: x.haslayer(TCP)
+5
source

More articles:


All Articles