PCAP Generator

This application generates PCAP files from CSV files using low-level Python tools

CSV file should look like this:

#this is a comment
src_mac=00:00:00:00:00:01,dst_mac=00:00:00:00:00:02, src_ip=10.0.0.1, dst_ip=10.0.0.2, src_port=12345, dst_port=22
src_mac=00:00:00:00:00:01,dst_mac=00:00:00:00:00:02, src_ip=10.0.0.1, dst_ip=10.0.0.2, dst_port=22
src_mac=00:00:00:00:00:01,dst_mac=00:00:00:00:00:02, src_ip=10.0.0.1, dst_ip=10.0.0.2, dst_port=2222,vlan=10
src_mac=20:00:00:00:00:01,dst_mac=20:00:00:00:00:02, vlan=1000
src_mac=00:00:00:00:00:01,dst_mac=00:00:00:00:00:02, src_ip=10.0.0.1, dst_ip=10.0.0.2, dst_port=22

If a necessary L2/L3/L4 header field is missing default values will be used, which can be changed by input arguments.

Requirements

• Python

Quick walkthrough

First, download the source

$ git clone https://github.com/cslev/pcap_generator
$ cd pcap_generator

Create your own CSV file, then execute the following command:

$ python pcap_generator_from_csv.py -i YOUR_INPUT.CSV -o YOUR_DESIRED_PCAPFILENAME

For additional arguments, see help

$ python pcap_generator_from_csv.py -h

usage: pcap_generator_from_csv.py [-h] -i INPUT -o OUTPUT [-p PACKETSIZES]
                                  [-a SRC_MAC] [-b DST_MAC] [-c VLAN]
                                  [-d SRC_IP] [-e DST_IP] [-f SRC_PORT]
                                  [-g DST_PORT]

Usage of PCAP generator from CSV file

optional arguments:
  -h, --help            show this help message and exit
  -i INPUT, --input INPUT
                        Specify the name of the input CSV file. For syntax,
                        see input.csv.example!
  -o OUTPUT, --output OUTPUT
                        Specify the output PCAP file's basename! Output will
                        be [output].[PACKETSIZE]bytes.pcap extension is not
                        needed!
  -p PACKETSIZES, --packetsizes PACKETSIZES
                        Specify here the required packetsize! In case of more
                        than one, just create a comma separated list such as
                        64,112,42. Default: 64
  -a SRC_MAC, --src_mac SRC_MAC
                        Specify default source MAC address if it is not
                        present in the input.csv. Default: 00:00:00:00:00:01
  -b DST_MAC, --dst_mac DST_MAC
                        Specify default destination MAC address if it is not
                        present in the input.csv. Default: 00:00:00:00:00:02
  -c VLAN, --vlan VLAN  Specify default VLAN tag if it is not present in the
                        input.csv. Default: No VLAN
  -d SRC_IP, --src_ip SRC_IP
                        Specify default source IP address if it is not present
                        in the input.csv. Default: 10.0.0.1
  -e DST_IP, --dst_ip DST_IP
                        Specify default destination IP address if it is not
                        present in the input.csv. Default: 192.168.88.8
  -f SRC_PORT, --src_port SRC_PORT
                        Specify default source port if it is not present in
                        the input.csv. Default: 1234
  -g DST_PORT, --dst_port DST_PORT
                        Specify default destination port if it is not present
                        in the input.csv. Default: 808

Example

In order to create a PCAP from CSV file called 'input.csv', desired output file called 'output.pcap' with packet sizes of 64,128, and 512 assuming that if there is no VLAN header specified in the CSV file for a given header then apply VLAN tag: 505, the following command will do the job:

$ python pcap_generator_from_csv.py -i input.csv -o output -p 64,128,512 --vlan 505

Your PCAP files will be 'output.64bytes.pcap', 'output.128bytes.pcap', and 'output.512bytes.pcap' all consisting of the same header fields but in different packet sizes.