+ #
+ # Translation of ICMP Time Exceeded v4 -> v6 direction
+ # Received packet should be translated into an IPv6 Time Exceeded.
+ #
+
+ def test_map_t_time_exceeded_ip4_to_ip6(self):
+ """ MAP-T time exceeded IPv4 -> IPv6 """
+
+ eth = Ether(src=self.pg0.remote_mac,
+ dst=self.pg0.local_mac)
+ ip = IP(src=self.pg0.remote_ip4,
+ dst=self.ipv4_map_address)
+ icmp = ICMP(type="time-exceeded", code="ttl-zero-during-transit")
+ ip_inner = IP(dst=self.pg0.remote_ip4,
+ src=self.ipv4_map_address, ttl=1)
+ udp_inner = UDP(sport=self.ipv4_udp_or_tcp_map_port,
+ dport=self.ipv4_udp_or_tcp_internet_port)
+ payload = "H" * 10
+ tx_pkt = eth / ip / icmp / ip_inner / udp_inner / payload
+
+ self.pg_send(self.pg0, tx_pkt * 1)
+
+ rx_pkts = self.pg1.get_capture(1)
+ rx_pkt = rx_pkts[0]
+
+ self.v6_address_check(rx_pkt)
+ self.assertEqual(rx_pkt[IPv6].nh, IPv6(nh="ICMPv6").nh)
+ self.assertEqual(rx_pkt[ICMPv6TimeExceeded].type,
+ ICMPv6TimeExceeded().type)
+ self.assertEqual(rx_pkt[ICMPv6TimeExceeded].code,
+ ICMPv6TimeExceeded(
+ code="hop limit exceeded in transit").code)
+ self.assertEqual(rx_pkt[ICMPv6TimeExceeded].hlim, tx_pkt[IP][1].ttl)
+ self.assertTrue(rx_pkt.haslayer(IPerror6))
+ self.assertTrue(rx_pkt.haslayer(UDPerror))
+ self.assertEqual(rx_pkt[IPv6].src, rx_pkt[IPerror6].dst)
+ self.assertEqual(rx_pkt[IPv6].dst, rx_pkt[IPerror6].src)
+ self.assertEqual(rx_pkt[UDPerror].sport, self.ipv6_udp_or_tcp_map_port)
+ self.assertEqual(rx_pkt[UDPerror].dport,
+ self.ipv6_udp_or_tcp_internet_port)
+