module Rex::Proto::NATPMP
Constants
- DefaultPort
- TCP
- UDP
- Version
Public Instance Methods
external_address_request()
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Return a NAT-PMP request to get the external address.
# File lib/rex/proto/natpmp/packet.rb, line 12 def external_address_request [ 0, 0 ].pack('nn') end
get_external_address(udp_sock, host, port, timeout=1)
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# File lib/rex/proto/natpmp/packet.rb, line 16 def get_external_address(udp_sock, host, port, timeout=1) vprint_status("#{host}:#{port} - Probing NAT-PMP for external address") udp_sock.sendto(external_address_request, host, port, 0) external_address = nil while (r = udp_sock.recvfrom(12, timeout) and r[1]) (ver, op, result, epoch, external_address) = parse_external_address_response(r[0]) if external_address vprint_good("#{host}:#{port} - NAT-PMP external address is #{external_address}") break end end external_address end
map_port(udp_sock, host, port, int_port, ext_port, protocol, lifetime, timeout=1)
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# File lib/rex/proto/natpmp/packet.rb, line 37 def map_port(udp_sock, host, port, int_port, ext_port, protocol, lifetime, timeout=1) vprint_status("#{host}:#{port} - Sending NAT-PMP mapping request") # build the mapping request req = map_port_request(int_port, ext_port, Rex::Proto::NATPMP.const_get(datastore['PROTOCOL']), datastore['LIFETIME']) # send it udp_sock.sendto(req, host, datastore['RPORT'], 0) # handle the reply while (r = udp_sock.recvfrom(16, timeout) and r[1]) (_, _, result, _, _, actual_ext_port, _) = parse_map_port_response(r[0]) return (result == 0 ? actual_ext_port : nil) end nil end
map_port_request(lport, rport, protocol, lifetime)
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Return a NAT-PMP request to map remote port rport
/protocol
to local port lport
for lifetime
ms
# File lib/rex/proto/natpmp/packet.rb, line 53 def map_port_request(lport, rport, protocol, lifetime) [ Rex::Proto::NATPMP::Version, # version protocol, # opcode, which is now the protocol we are asking to forward 0, # reserved lport, rport, lifetime ].pack("CCnnnN") end
parse_external_address_response(resp)
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Parse a NAT-PMP external address response resp
. Returns the decoded parts of the response as an array.
# File lib/rex/proto/natpmp/packet.rb, line 32 def parse_external_address_response(resp) (ver, op, result, epoch, addr) = resp.unpack("CCnNN") [ ver, op, result, epoch, Rex::Socket::addr_itoa(addr) ] end
parse_map_port_response(resp)
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Parse a NAT-PMP mapping response resp
. Returns the decoded parts as an array.
# File lib/rex/proto/natpmp/packet.rb, line 65 def parse_map_port_response(resp) resp.unpack("CCnNnnN") end