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