在python 2.7中使用scapy

Question

I am trying to do a graphical representation of packets using scapy,python-2.7 and some graph module (which i haven't thought of yet). Basically, I want to read the types of data packets from a pcap file using scapy, parse it and in turn simulate a graph.

I have written the following code to just check how rdpcap works:

**from scapy.utils import rdpcap
packets = rdpcap("/Packet_Inspection/Sample_2.pcap000")
print packets**

And i keep getting the following error:

**Traceback (most recent call last):
 >> File "test1.py", line 8, in <module>
    packets = rdpcap("/Packet_Inspection/Sample_2.pcap000")
 >>File "C:\python27\lib\site-packages\scapy\utils.py", line 559, in rdpcap
    return fdesc.read_all(count=count)
  >>File "C:\python27\lib\site-packages\scapy\utils.py", line 729, in read_all
    res = RawPcapReader.read_all(self, count)
  >>File "C:\python27\lib\site-packages\scapy\utils.py", line 680, in read_all
    p = self.read_packet()
  >>File "C:\python27\lib\site-packages\scapy\utils.py", line 725, in read_packet
    p = conf.raw_layer(s)
>>TypeError: 'NoneType' object is not callable**

Please help me here.

Answer 1

multiple things could be going wrong here.

does /Packet_Inspection/Sample_2.pcap000 really exist at the root?

are there packets in the pcap?

also, rdpcap returns a python array of scapy Packet objects. you could try printing a single instance with print packets[0]