Class: BetterCap::Discovery::Agents::Wsd

Inherits:
Object
  • Object
show all
Defined in:
lib/bettercap/discovery/agents/wsd.rb

Overview

Class responsible for sending WS-Discovery broadcast queries to the network.

Instance Method Summary collapse

Constructor Details

#initialize(ctx, address = nil) ⇒ Wsd

References:



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# File 'lib/bettercap/discovery/agents/wsd.rb', line 34

def initialize( ctx, address = nil )
  pkt = PacketFu::UDPPacket.new

  pkt.eth_saddr = ctx.iface.mac
  pkt.eth_daddr = '01:00:5e:7f:ff:fa'
  pkt.ip_saddr  = ctx.iface.ip
  pkt.ip_daddr  = '239.255.255.250'
  pkt.udp_src   = (rand((2 ** 16) - 1024) + 1024).to_i
  pkt.udp_dst   = 3702

  uuid = SecureRandom.uuid

  payload = '<?xml version="1.0" encoding="utf-8" ?>'
  payload << '<soap:Envelope'
  payload << ' xmlns:soap="http://www.w3.org/2003/05/soap-envelope"'
  payload << ' xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/08/addressing"'
  payload << ' xmlns:wsd="http://schemas.xmlsoap.org/ws/2005/04/discovery"'
  payload << ' xmlns:wsdp="http://schemas.xmlsoap.org/ws/2006/02/devprof">'

  payload << '<soap:Header>'
  # WS-Discovery
  payload << '<wsa:To>urn:schemas-xmlsoap-org:ws:2005:04:discovery</wsa:To>'
  # Action (Probe)
  payload << "<wsa:Action>http://schemas.xmlsoap.org/ws/2005/04/discovery/Probe</wsa:Action>"
  # Message identifier (unique GUID)
  payload << "<wsa:MessageID>urn:uuid:#{uuid}</wsa:MessageID>"
  payload << '</soap:Header>'

  payload << '<soap:Body>'
  payload << '<wsd:Probe/>' # WS-Discovery type (blank)
  payload << '</soap:Body>'
  payload << '</env:Envelope>'

  pkt.payload = payload
  pkt.recalc

  ctx.packets.push(pkt)
end