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from .trex_stl_rx_service_api import RXServiceAPI
from ..trex_stl_streams import STLStream, STLTXSingleBurst
from ..trex_stl_packet_builder_scapy import *
from ..trex_stl_types import *
from scapy.layers.l2 import Ether
from scapy.layers.inet6 import *
import time
class RXServiceIPv6(RXServiceAPI):
def __init__(self, port, dst_ip, *a, **k):
RXServiceAPI.__init__(self, port, *a, **k)
self.attr = port.get_ts_attr()
self.src_mac = self.attr['layer_cfg']['ether']['src']
mac_for_ip = port.info.get('hw_mac', self.src_mac)
self.src_ip = generate_ipv6(mac_for_ip)
self.mld_ip = generate_ipv6_solicited_node(mac_for_ip)
self.dst_ip = dst_ip
self.responses = {}
def pre_execute(self):
return self.port.ok()
def send_intermediate(self, streams):
self.port.remove_all_streams()
self.port.add_streams(streams)
mult = {'op': 'abs', 'type' : 'percentage', 'value': 100}
self.port.start(mul = mult, force = True, duration = -1, mask = 0xffffffff)
def generate_ns(self, dst_mac, dst_ip):
pkt = (Ether(src = self.src_mac, dst = dst_mac) /
IPv6(src = self.src_ip, dst = dst_ip) /
ICMPv6ND_NS(tgt = dst_ip) /
ICMPv6NDOptSrcLLAddr(lladdr = self.src_mac))
return STLStream(packet = STLPktBuilder(pkt = pkt), mode = STLTXSingleBurst(total_pkts = 2))
def generate_na(self, dst_mac, dst_ip):
pkt = (Ether(src = self.src_mac, dst = dst_mac) /
IPv6(src = self.src_ip, dst = dst_ip) /
ICMPv6ND_NA(tgt = self.src_ip, R = 0, S = 1, O = 1))
return STLStream(packet = STLPktBuilder(pkt = pkt), mode = STLTXSingleBurst(total_pkts = 2))
def generate_ns_na(self, dst_mac, dst_ip):
return [self.generate_ns(dst_mac, dst_ip), self.generate_na(dst_mac, dst_ip)]
def execute(self, *a, **k):
mult = self.attr['multicast']['enabled']
try:
if mult != True:
self.port.set_attr(multicast = True) # response might be multicast
return RXServiceAPI.execute(self, *a, **k)
finally:
if mult != True:
self.port.set_attr(multicast = False)
class RXServiceIPv6Scan(RXServiceIPv6):
''' Ping with given IPv6 (usually all nodes address) and wait for responses until timeout '''
def get_name(self):
return 'IPv6 scanning'
def generate_request(self):
dst_mac = multicast_mac_from_ipv6(self.dst_ip)
dst_mld_ip = 'ff02::16'
dst_mld_mac = multicast_mac_from_ipv6(dst_mld_ip)
mld_pkt = (Ether(src = self.src_mac, dst = dst_mld_mac) /
IPv6(src = self.src_ip, dst = dst_mld_ip, hlim = 1) /
IPv6ExtHdrHopByHop(options = [RouterAlert(), PadN()]) /
ICMPv6MLReportV2() /
MLDv2Addr(type = 4, len = 0, multicast_addr = 'ff02::2'))
ping_pkt = (Ether(src = self.src_mac, dst = dst_mac) /
IPv6(src = self.src_ip, dst = self.dst_ip, hlim = 1) /
ICMPv6EchoRequest())
mld_stream = STLStream(packet = STLPktBuilder(pkt = mld_pkt),
mode = STLTXSingleBurst(total_pkts = 2))
ping_stream = STLStream(packet = STLPktBuilder(pkt = ping_pkt),
mode = STLTXSingleBurst(total_pkts = 2))
return [mld_stream, ping_stream]
def on_pkt_rx(self, pkt, start_ts):
# convert to scapy
scapy_pkt = Ether(pkt['binary'])
if scapy_pkt.haslayer('ICMPv6ND_NS') and scapy_pkt.haslayer('ICMPv6NDOptSrcLLAddr'):
node_mac = scapy_pkt.getlayer(ICMPv6NDOptSrcLLAddr).lladdr
node_ip = scapy_pkt.getlayer(IPv6).src
if node_ip not in self.responses:
self.send_intermediate(self.generate_ns_na(node_mac, node_ip))
elif scapy_pkt.haslayer('ICMPv6ND_NA'):
is_router = scapy_pkt.getlayer(ICMPv6ND_NA).R
node_ip = scapy_pkt.getlayer(ICMPv6ND_NA).tgt
dst_ip = scapy_pkt.getlayer(IPv6).dst
node_mac = scapy_pkt.src
if node_ip not in self.responses and dst_ip == self.src_ip:
self.responses[node_ip] = {'type': 'Router' if is_router else 'Host', 'mac': node_mac}
elif scapy_pkt.haslayer('ICMPv6EchoReply'):
node_mac = scapy_pkt.src
node_ip = scapy_pkt.getlayer(IPv6).src
if node_ip == self.dst_ip:
return self.port.ok([{'ipv6': node_ip, 'mac': node_mac}])
if node_ip not in self.responses:
self.send_intermediate(self.generate_ns_na(node_mac, node_ip))
def on_timeout(self):
return self.port.ok([{'type': v['type'], 'mac': v['mac'], 'ipv6': k} for k, v in self.responses.items()])
class RXServiceICMPv6(RXServiceIPv6):
'''
Ping some IPv6 location.
If the dest MAC is found from scanning, use it.
Otherwise, send to default port dest.
'''
def __init__(self, port, pkt_size, dst_mac = None, *a, **k):
super(RXServiceICMPv6, self).__init__(port, *a, **k)
self.pkt_size = pkt_size
self.dst_mac = dst_mac
self.result = {}
def get_name(self):
return 'PING6'
def pre_execute(self):
if self.dst_mac is None and not self.port.is_resolved():
return self.port.err('ping - port has an unresolved destination, cannot determine next hop MAC address')
return self.port.ok()
# return a list of streams for request
def generate_request(self):
attrs = self.port.get_ts_attr()
if self.dst_mac is None:
self.dst_mac = attrs['layer_cfg']['ether']['dst']
ping_pkt = (Ether(src = self.src_mac, dst = self.dst_mac) /
IPv6(src = self.src_ip, dst = self.dst_ip) /
ICMPv6EchoRequest())
pad = max(0, self.pkt_size - len(ping_pkt))
ping_pkt /= pad * 'x'
return STLStream( packet = STLPktBuilder(pkt = ping_pkt), mode = STLTXSingleBurst(total_pkts = 2) )
def on_pkt_rx(self, pkt, start_ts):
scapy_pkt = Ether(pkt['binary'])
if scapy_pkt.haslayer('ICMPv6EchoReply'):
node_ip = scapy_pkt.getlayer(IPv6).src
hlim = scapy_pkt.getlayer(IPv6).hlim
dst_ip = scapy_pkt.getlayer(IPv6).dst
if dst_ip != self.src_ip: # not our ping
return
dt = pkt['ts'] - start_ts
self.result['formatted_string'] = 'Reply from {0}: bytes={1}, time={2:.2f}ms, hlim={3}'.format(node_ip, len(pkt['binary']), dt * 1000, hlim)
self.result['src_ip'] = node_ip
self.result['rtt'] = dt * 1000
self.result['ttl'] = hlim
self.result['status'] = 'success'
return self.port.ok(self.result)
if scapy_pkt.haslayer('ICMPv6ND_NS') and scapy_pkt.haslayer('ICMPv6NDOptSrcLLAddr'):
node_mac = scapy_pkt.getlayer(ICMPv6NDOptSrcLLAddr).lladdr
node_ip = scapy_pkt.getlayer(IPv6).src
dst_ip = scapy_pkt.getlayer(IPv6).dst
if dst_ip != self.src_ip: # not our ping
return
self.send_intermediate(self.generate_ns_na(node_mac, node_ip))
if scapy_pkt.haslayer('ICMPv6DestUnreach'):
node_ip = scapy_pkt.getlayer(IPv6).src
dst_ip = scapy_pkt.getlayer(IPv6).dst
if dst_ip != self.src_ip: # not our ping
return
self.result['formatted_string'] = 'Reply from {0}: Destination host unreachable'.format(node_ip)
self.result['status'] = 'unreachable'
return self.port.ok(self.result)
# return the str of a timeout err
def on_timeout(self):
self.result['formatted_string'] = 'Request timed out.'
self.result['status'] = 'timeout'
return self.port.ok(self.result)
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