Class: ArpScanner

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

Instance Method Summary collapse

Constructor Details

#initialize(nic: `ip addr`[/(?<=global )\w+/], vendors: {}) ⇒ ArpScanner

options: nic: e.g. eth0, enp2s0f0



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# File 'lib/arpscanner.rb', line 13

def initialize(nic: `ip addr`[/(?<=global )\w+/], vendors: {})
  
  package = 'arp-scan'
  @vendors = vendors
  
  found = `dpkg --get-selections | grep #{package}`
  
  if found.empty? then
    raise 'ArpScanner: arp-scan package not found'.error
  end
  
  @arpscan_cmd = "sudo #{package} --interface=#{nic} --localnet"
  
end

Instance Method Details

#scan ⇒ Object 



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# File 'lib/arpscanner.rb', line 28

def scan()
  
  a = `#{@arpscan_cmd}`.lines

  a2 = a[2..-3].map {|x| %i(ip mac mfr).zip(x.chomp.split("\t")).to_h}
  
  # Add additional vendors
  h = {/^b8:27:eb:/ => 'Raspberry Pi Foundation'}.merge(@vendors)
  
  a2.map! do |x|
    
    _, vendor = h.detect {|mac, mfr| x[:mac] =~ mac }
    x[:mfr] = vendor if vendor
    x

  end
  
  @dx = Dynarex.new
  @dx.import a2    

end