Class: NetworkScanner::Scanner

Inherits:
Object
  • Object
show all
Defined in:
lib/network_scanner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ Scanner

Returns a new instance of Scanner.



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# File 'lib/network_scanner.rb', line 29

def initialize(opts = {})
  @pool_size = 100
  @format = 'text'
end

Instance Attribute Details

#format ⇒ Object

Returns the value of attribute format.



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# File 'lib/network_scanner.rb', line 27

def format
  @format
end

#output_name ⇒ Object

Returns the value of attribute output_name.



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# File 'lib/network_scanner.rb', line 27

def output_name
  @output_name
end

#pool_size ⇒ Object

Returns the value of attribute pool_size.



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# File 'lib/network_scanner.rb', line 27

def pool_size
  @pool_size
end

Instance Method Details

#check_hostnames ⇒ Object

Raises:

  • (Exception) 


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# File 'lib/network_scanner.rb', line 195

def check_hostnames
  raise Exception.new("Must scan ips first (Specify an interface or cacheread)") unless @ips_to_check

  puts "Scanning for hostnames out of a total of #{@ips_to_check.length} ips"

  if self.output_name
    out = File.open(self.output_name, 'w')
  else
    out = STDOUT
  end

  pool = Thread.pool(@pool_size)

  @ip_hosts = []

  @ips_to_check.each do |ip|
    pool.process do
      scan = `nslookup #{ip}`
      hostname = scan[/name\ =\ (.*)\n/, 1]
      if hostname
        @ip_hosts << [ip, hostname]
        if text?
          out.print "#{hostname} => #{ip}\n"
        end
      end
    end
  end

  pool.shutdown

  if json?
    out.puts(JSON.pretty_generate(@ip_hosts))
  end

  out.close unless out == STDOUT

  return @ip_hosts
end

#check_pings ⇒ Object

Raises:

  • (Exception) 


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# File 'lib/network_scanner.rb', line 112

def check_pings
  raise Exception.new("Must specify ips to check(interface/range/cache)") unless @ips_to_check

  @ips = []

  pool = Thread.pool(@pool_size)

  if self.output_name
    out = File.open(self.output_name, 'w')
  else
    out = STDOUT
  end

  @ips_to_check.each do |ip|
    pool.process do
      # For some reason &> isn't working, so pipe stdout and then stderr
      if system("ping -c 1 #{ip} >> /dev/null 2> /dev/null")
        @ips << ip
        if text?
          out.print "#{ip}\n"
        end
      end
    end
  end

  pool.shutdown

  if json?
    out.puts(JSON.pretty_generate(@ips))
  end

  out.close unless out == STDOUT

  return @ips
end

#check_ports(port) ⇒ Object

Raises:

  • (Exception) 


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# File 'lib/network_scanner.rb', line 158

def check_ports(port)
  raise Exception.new("Must scan ips first (Specify an interface or cacheread)") unless @ips_to_check

  puts "Checking for ports out of a total of #{@ips_to_check.length} ips"

  if self.output_name
    out = File.open(self.output_name, 'w')
  else
    out = STDOUT
  end

  pool = Thread.pool(@pool_size)

  @ips = []

  @ips_to_check.each do |ip|
    pool.process do
      if port_open?(ip, port)
        @ips << ip
        if text?
          out.print "#{ip}\n"
        end
      end
    end
  end

  pool.shutdown

  if json?
    out.puts(JSON.pretty_generate(@ips))
  end

  out.close unless out == STDOUT

  return @ips
end

#get_cache_ips(file) ⇒ Object 



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# File 'lib/network_scanner.rb', line 97

def get_cache_ips(file)
  @ips_to_check = []

  if text?
    File.open(file).each_line do |ip|
      @ips_to_check << ip
    end
  elsif json?
    JSON.parse(File.read(file)).each do |ip|
      @ips_to_check << ip
    end
  end
  return @ips_to_check
end

#get_interface_ips(interface) ⇒ Object 



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# File 'lib/network_scanner.rb', line 42

def get_interface_ips(interface)
  ifconfig = `ifconfig`.split("\n\n").index_by{|x| x[/\w+/,0]}
  inet = ifconfig[interface][/inet addr:([^\s]*)/, 1].split('.')
  broadcast = ifconfig[interface][/Bcast:([^\s]*)/, 1].split('.')
  mask = ifconfig[interface][/Mask:([^\s]*)/, 1].split('.')

  start_first = inet[0].to_i & mask[0].to_i
  start_second = inet[1].to_i & mask[1].to_i
  start_third = inet[2].to_i & mask[2].to_i
  start_fourth = inet[3].to_i & mask[3].to_i

  first_range = start_first..broadcast[0].to_i
  second_range = start_second..broadcast[1].to_i
  third_range = start_third..broadcast[2].to_i
  fourth_range = start_fourth..broadcast[3].to_i
  
  @ips_to_check = []

  first_range.each do |first|
    second_range.each do |second|
      third_range.each do |third|
        fourth_range.each do |fourth|
          @ips_to_check << "#{first}.#{second}.#{third}.#{fourth}"
        end
      end
    end
  end

  puts "Checking ips in (#{first_range}).(#{second_range}).(#{third_range}).(#{fourth_range})"
  return @ips_to_check
end

#get_range_ips(range) ⇒ Object 



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# File 'lib/network_scanner.rb', line 74

def get_range_ips(range)
  start, finish = range.split('-', 2).map{|ip| ip.split('.')}
  first_range = start[0]..finish[0]
  second_range = start[1]..finish[1]
  third_range = start[2]..finish[2]
  fourth_range = start[3]..finish[3]

  @ips_to_check = []

  first_range.each do |first|
    second_range.each do |second|
      third_range.each do |third|
        fourth_range.each do |fourth|
          @ips_to_check << "#{first}.#{second}.#{third}.#{fourth}"
        end
      end
    end
  end

  puts "Checking ips in (#{first_range}).(#{second_range}).(#{third_range}).(#{fourth_range})"
  return @ips_to_check
end

#json? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/network_scanner.rb', line 38

def json?
  @format == 'json'
end

#port_open?(ip, port) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/network_scanner.rb', line 148

def port_open?(ip, port)
  Timeout::timeout(0.5) do
    s = TCPSocket.new(ip,port)
    s.close
    return true
  end
rescue Timeout::Error
  return false
end

#text? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/network_scanner.rb', line 34

def text?
  @format == 'text'
end