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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Auxiliary
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  include Msf::Exploit::Remote::Capture
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  include Msf::Exploit::Remote::Ipv6
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  include Msf::Auxiliary::Report
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  def initialize
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    super(
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    'Name'        => 'IPv6 Link Local/Node Local Ping Discovery',
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    'Description' => %q{
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        Send a ICMPv6 ping request to all default multicast addresses, and wait to see who responds.
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    },
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    'Author'      => 'wuntee',
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    'License'     => MSF_LICENSE,
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    'References'    =>
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      [
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        ['URL','http://wuntee.blogspot.com/2010/12/ipv6-ping-host-discovery-metasploit.html']
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      ]
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    )
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    deregister_options('SNAPLEN', 'FILTER', 'PCAPFILE')
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  end
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  def listen_for_ping_response(opts = {})
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    hosts = {}
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    timeout = opts['TIMEOUT'] || datastore['TIMEOUT']
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    prefix = opts['PREFIX'] || datastore['PREFIX']
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    max_epoch = ::Time.now.to_i + timeout
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    while(::Time.now.to_i < max_epoch)
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      pkt_bytes = capture.next()
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      Kernel.select(nil,nil,nil,0.1)
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      next if not pkt_bytes
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      p = PacketFu::Packet.parse(pkt_bytes)
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      # Don't bother checking if it's an echo reply, since Neighbor Solicitations
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      # and any other response is just as good.
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      next unless p.is_ipv6?
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      host_addr = p.ipv6_saddr
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      host_mac = p.eth_saddr
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      next if host_mac == @smac
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      unless hosts[host_addr] == host_mac
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        hosts[host_addr] = host_mac
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        print_status("   |*| #{host_addr} => #{host_mac}")
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      end
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    end
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    return hosts
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  end
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  def smac
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    smac  = datastore['SMAC']
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    smac ||= get_mac(@interface) if @netifaces
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    smac ||= ipv6_mac
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    smac
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  end
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  def run
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    # Start capture
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    open_pcap({'FILTER' => "icmp6"})
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    @netifaces = true
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    if not netifaces_implemented?
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      print_error("WARNING : Pcaprub is not up-to-date, some functionality will not be available")
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      @netifaces = false
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    end
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    @interface = datastore['INTERFACE'] || Pcap.lookupdev
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    # Send ping
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    print_status("Sending multicast pings...")
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    dmac = "33:33:00:00:00:01"
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    @smac = smac
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    # Figure out our source address by the link-local interface
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    shost = ipv6_link_address
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    # m-1-k-3: added some more multicast addresses from wikipedia: https://en.wikipedia.org/wiki/Multicast_address#IPv6
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    ping6("FF01::1", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})    #node-local all nodes
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    ping6("FF01::2", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})    #node-local all routers
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    ping6("FF02::1", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})    #All nodes on the local network segment
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    ping6("FF02::2", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})    #All routers on the local network segment
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    ping6("FF02::5", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})    #OSPFv3 AllSPF routers
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    ping6("FF02::6", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})    #OSPFv3 AllDR routers
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    ping6("FF02::9", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})    #RIP routers
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    ping6("FF02::a", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})    #EIGRP routers
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    ping6("FF02::d", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})    #PIM routers
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    ping6("FF02::16", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})   #MLDv2 reports (defined in RFC 3810)
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    ping6("ff02::1:2", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})  #All DHCP servers and relay agents on the local network site (defined in RFC 3315)
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    ping6("ff05::1:3", {"DMAC" => dmac, "SHOST" => shost, "SMAC" =>  @smac, "WAIT" => false})  #All DHCP servers on the local network site (defined in RFC 3315)
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    # Listen for host advertisements
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    print_status("Listening for responses...")
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    listen_for_ping_response()
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    # Close capture
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    close_pcap()
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  end
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end
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