Copy pcap file with producer consumer model

      Using the producer consumer model, we can put the need for multiple cycles 、 Change the tightly coupled program architecture into a loosely coupled program architecture , In this way, you can easily add processing code for each line in the middle , For example, the following situation , In view of a pcap, Each package needs to be analyzed , The following code is just a preliminary framework , There is only one copy function .

#!/bin/env python3
import sys,os
import threading
import time
import queue
import dpkt

tspkt=[]
def consume(thread_name, q):
    with open('./project3bak.pcap','wb') as pcapwr:
        writer=dpkt.pcap.Writer(pcapwr)
        while True:
            #time.sleep(2)
            product = q.get()
            print("%s consume %s" % (thread_name, product))
            writer.writepkt(pkt=product[1],ts=product[0])
def produce(thread_name, q):
        with open('./project3.pcap','rb') as pcaprd:
            reader=dpkt.pcap.Reader(pcaprd)
            for ts,pkt in reader.readpkts():
                tspkt=[ts,pkt]
                q.put(tspkt)
            
q = queue.Queue()
p = threading.Thread(target=produce, args=("producer",q))
c = threading.Thread(target=consume, args=("consumer",q))

p.start()
c.start()

p.join()