ANTFARM/PCAP/PCAP script
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- ! /usr/bin/ruby
#
# Copyright (2008) Sandia Corporation.
# Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
# the U.S. Government retains certain rights in this software.
#
# Original Author: Michael Berg, Sandia National Laboratories <mjberg@sandia.gov>
# Modified By: Bryan T. Richardson, Sandia National Laboratories <btricha@sandia.gov>
# Further Modified By: Melissa Myerly & Cassandra Trevino, Sandia National Laboratories
# This library is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or (at
# your option) any later version.
#
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
require 'pcap'
#
def print_help
puts "Usage: antfarm [options] pcap [options] parse-pcap-file [options] <pcap file>"
puts
puts "This script parses a libPcap file containing traffic capture data,"
puts "creating an IP interface for each endpoint and a traffic object"
puts "for the traffic between them. Node device types are set to 'PCAP',"
puts "as well as traffic descriptions."
puts
puts "Script Options:"
puts " --create-new-networks Create new networks if networks containing the"
puts " source or destination address don't already exist."
end
#
def parse(file, options = [])
puts file
#
cap = Pcap::Capture.open_offline(file)
cap.each do |pkt|
if pkt.ip?
source_addr = pkt.src.to_num_s
target_addr = pkt.dst.to_num_s
source_in_networks = false
target_in_networks = false
network_list.each do |network|
net = Antfarm::IPAddrExt.new(network)
if net.network_in_network?(source_addr)
source_in_networks = true
break
end
end
network_list.each do |network|
net = Antfarm::IPAddrExt.new(network)
if net.network_in_network?(target_addr)
target_in_networks = true
break
end
end
Parsing through the PCAP file and determining whether or not each source or target address is already in the network that is in the database. This is done when the—create-new-networks option is used.
if source_in_networks || target_in_networks
if options.include?('--create-new-networks')
source_iface = IpInterface.find_or_initialize_by_address(source_addr)
if source_iface.new_record?
source_iface.node_name = source_addr #Assigns the source_iface.node_name the current source address
source_iface.node_device_type = 'PCAP' #Informs the database this is coming from PCAP information/file
source_iface.save false
end
target_iface = IpInterface.find_or_initialize_by_address(target_addr)
if target_iface.new_record?
target_iface.node_name = target_addr
target_iface.node_device_type = 'PCAP'
target_iface.save false
end
if pkt.tcp? || pkt.udp?
traffic = Traffic.first(:conditions => { :source_layer3_interface_id => source_iface.layer3_interface.id,
:target_layer3_interface_id => target_iface.layer3_interface.id,
:port => pkt.dport})
else
traffic = Traffic.first(:conditions => { :source_layer3_interface_id => source_iface.layer3_interface.id,
:target_layer3_interface_id => target_iface.layer3_interface.id })
end
unless traffic
if pkt.tcp? || pkt.udp?
traffic = Traffic.create :source_layer3_interface => source_iface.layer3_interface,
:target_layer3_interface => target_iface.layer3_interface,
:port => pkt.dport,
:description => "PCAP"
else
traffic = Traffic.create :source_layer3_interface => source_iface.layer3_interface,
:target_layer3_interface => target_iface.layer3_interface,
:description => "PCAP"
end
puts "Added traffic -- #{source_addr} ==> #{target_addr}" #Prints traffic added to the database to the screen.
end
else
source_net = Layer3Network.network_containing(source_addr)
target_net = Layer3Network.network_containing(target_addr)
if source_net && target_net
source_iface = IpInterface.find_or_initialize_by_address(source_addr)
if source_iface.new_record?
source_iface.node_name = source_addr
source_iface.node_device_type = 'PCAP'
source_iface.save false
end
target_iface = IpInterface.find_or_initialize_by_address(target_addr)
if target_iface.new_record?
target_iface.node_name = target_addr
target_iface.node_device_type = 'PCAP'
target_iface.save false
end
if pkt.tcp? || pkt.udp?
traffic = Traffic.first(:conditions => { :source_layer3_interface_id => source_iface.layer3_interface.id,
:target_layer3_interface_id => target_iface.layer3_interface.id,
:port => pkt.dport})
else
traffic = Traffic.first(:conditions => { :source_layer3_interface_id => source_iface.layer3_interface.id,
:target_layer3_interface_id =>target_iface.layer3_interface.id })
end
unless traffic
if pkt.tcp? || pkt.udp?
traffic = Traffic.create :source_layer3_interface => source_iface.layer3_interface,
:target_layer3_interface => target_iface.layer3_interface,
:port => pkt.dport,
:description => "PCAP"
else
traffic = Traffic.create :source_layer3_interface => source_iface.layer3_interface,
:target_layer3_interface => target_iface.layer3_interface,:description => "PCAP"
end
puts "Added traffic -- #{source_addr} ==> #{target_addr}"
end
end
end
end
end
end
end
#
if ['-h', '--help'].include?(ARGV[0])
print_help
else
file_dir = ARGV.pop
if File.directory?(file_dir)
Find.find(file_dir) do |path|
if File.file?(path)
parse(path, ARGV)
end
end
else
parse(file_dir, ARGV)
end
end