[包编辑]-延迟指定序号包及之后的其他包的arrive time

• 延迟指定序号包之后的其他包的时间

./updat_packet_timestamp.py -i input.pcap -o output.pcap -d 0.01 -n 2

#!/usr/bin/python3

import argparse
from scapy.all import *

def parse_args():
    parse = argparse.ArgumentParser(description="postpone the packet timestamp after specified number of packet!")
    parse.add_argument("-i", help='the input packet', dest='input', required=True)
    parse.add_argument("-o", help='the output packet', dest='output', required=True)
    parse.add_argument("-d", help='the delay time(s)', dest='delay', required=True)
    parse.add_argument("-n", help='the index of packet', dest='index', required=True, default=0)
    return parse.parse_args()

def postpone_packet():
    pcap_file = rdpcap(args.input)
    tc_packet = []
    for number in range(len(pcap_file)):
        pkg = pcap_file[number]
        if number < args.index:
            tc_packet.append(pkg)
        else:
            pkg.time = pkg.time + args.delay
            tc_packet.append(pkg)
    wrpcap(args.output, tc_packet)

if __name__ == "__main__":
    args = parse_args()
    postpone_packet()