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#!/usr/bin/env python
from framework import VppTestCase, VppTestRunner
from vpp_udp_encap import *
from vpp_ip_route import VppIpRoute, VppRoutePath, VppIpTable
from scapy.packet import Raw
from scapy.layers.l2 import Ether, ARP
from scapy.layers.inet import IP, UDP
from scapy.layers.inet6 import IPv6
from scapy.contrib.mpls import MPLS
class TestUdpEncap(VppTestCase):
""" UDP Encap Test Case """
def setUp(self):
super(TestUdpEncap, self).setUp()
# create 2 pg interfaces
self.create_pg_interfaces(range(4))
# setup interfaces
# assign them different tables.
table_id = 0
self.tables = []
for i in self.pg_interfaces:
i.admin_up()
if table_id != 0:
tbl = VppIpTable(self, table_id)
tbl.add_vpp_config()
self.tables.append(tbl)
tbl = VppIpTable(self, table_id, is_ip6=1)
tbl.add_vpp_config()
self.tables.append(tbl)
i.set_table_ip4(table_id)
i.set_table_ip6(table_id)
i.config_ip4()
i.resolve_arp()
i.config_ip6()
i.resolve_ndp()
table_id += 1
def tearDown(self):
for i in self.pg_interfaces:
i.unconfig_ip4()
i.unconfig_ip6()
i.ip6_disable()
i.set_table_ip4(0)
i.set_table_ip6(0)
i.admin_down()
super(TestUdpEncap, self).tearDown()
def validate_outer4(self, rx, encap_obj):
self.assertEqual(rx[IP].src, encap_obj.src_ip_s)
self.assertEqual(rx[IP].dst, encap_obj.dst_ip_s)
self.assertEqual(rx[UDP].sport, encap_obj.src_port)
self.assertEqual(rx[UDP].dport, encap_obj.dst_port)
def validate_outer6(self, rx, encap_obj):
self.assertEqual(rx[IPv6].src, encap_obj.src_ip_s)
self.assertEqual(rx[IPv6].dst, encap_obj.dst_ip_s)
self.assertEqual(rx[UDP].sport, encap_obj.src_port)
self.assertEqual(rx[UDP].dport, encap_obj.dst_port)
def validate_inner4(self, rx, tx, ttl=None):
self.assertEqual(rx.src, tx[IP].src)
self.assertEqual(rx.dst, tx[IP].dst)
if ttl:
self.assertEqual(rx.ttl, ttl)
else:
self.assertEqual(rx.ttl, tx[IP].ttl)
def validate_inner6(self, rx, tx):
self.assertEqual(rx.src, tx[IPv6].src)
self.assertEqual(rx.dst, tx[IPv6].dst)
self.assertEqual(rx.hlim, tx[IPv6].hlim)
def send_and_expect(self, input, output, pkts):
self.vapi.cli("clear trace")
input.add_stream(pkts)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
rx = output.get_capture(len(pkts))
return rx
def test_udp_encap(self):
""" UDP Encap test
"""
#
# construct a UDP encap object through each of the peers
# v4 through the first two peears, v6 through the second.
#
udp_encap_0 = VppUdpEncap(self, 0,
self.pg0.local_ip4,
self.pg0.remote_ip4,
330, 440)
udp_encap_1 = VppUdpEncap(self, 1,
self.pg1.local_ip4,
self.pg1.remote_ip4,
331, 441,
table_id=1)
udp_encap_2 = VppUdpEncap(self, 2,
self.pg2.local_ip6,
self.pg2.remote_ip6,
332, 442,
table_id=2,
is_ip6=1)
udp_encap_3 = VppUdpEncap(self, 3,
self.pg3.local_ip6,
self.pg3.remote_ip6,
333, 443,
table_id=3,
is_ip6=1)
udp_encap_0.add_vpp_config()
udp_encap_1.add_vpp_config()
udp_encap_2.add_vpp_config()
udp_encap_3.add_vpp_config()
#
# Routes via each UDP encap object - all combinations of v4 and v6.
#
route_4o4 = VppIpRoute(self, "1.1.0.1", 32,
[VppRoutePath("0.0.0.0",
0xFFFFFFFF,
is_udp_encap=1,
next_hop_id=0)])
route_4o6 = VppIpRoute(self, "1.1.2.1", 32,
[VppRoutePath("0.0.0.0",
0xFFFFFFFF,
is_udp_encap=1,
next_hop_id=2)])
route_6o4 = VppIpRoute(self, "2001::1", 128,
[VppRoutePath("0.0.0.0",
0xFFFFFFFF,
is_udp_encap=1,
next_hop_id=1)],
is_ip6=1)
route_6o6 = VppIpRoute(self, "2001::3", 128,
[VppRoutePath("0.0.0.0",
0xFFFFFFFF,
is_udp_encap=1,
next_hop_id=3)],
is_ip6=1)
route_4o4.add_vpp_config()
route_4o6.add_vpp_config()
route_6o6.add_vpp_config()
route_6o4.add_vpp_config()
#
# 4o4 encap
#
p_4o4 = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IP(src="2.2.2.2", dst="1.1.0.1") /
UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
rx = self.send_and_expect(self.pg0, self.pg0, p_4o4*65)
for p in rx:
self.validate_outer4(p, udp_encap_0)
p = IP(p["UDP"].payload.load)
self.validate_inner4(p, p_4o4)
#
# 4o6 encap
#
p_4o6 = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IP(src="2.2.2.2", dst="1.1.2.1") /
UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
rx = self.send_and_expect(self.pg0, self.pg2, p_4o6*65)
for p in rx:
self.validate_outer6(p, udp_encap_2)
p = IP(p["UDP"].payload.load)
self.validate_inner4(p, p_4o6)
#
# 6o4 encap
#
p_6o4 = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src="2001::100", dst="2001::1") /
UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
rx = self.send_and_expect(self.pg0, self.pg1, p_6o4*65)
for p in rx:
self.validate_outer4(p, udp_encap_1)
p = IPv6(p["UDP"].payload.load)
self.validate_inner6(p, p_6o4)
#
# 6o6 encap
#
p_6o6 = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IPv6(src="2001::100", dst="2001::3") /
UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
rx = self.send_and_expect(self.pg0, self.pg3, p_6o6*65)
for p in rx:
self.validate_outer6(p, udp_encap_3)
p = IPv6(p["UDP"].payload.load)
self.validate_inner6(p, p_6o6)
#
# A route with an output label
# the TTL of the inner packet is decremented on LSP ingress
#
route_4oMPLSo4 = VppIpRoute(self, "1.1.2.22", 32,
[VppRoutePath("0.0.0.0",
0xFFFFFFFF,
is_udp_encap=1,
next_hop_id=1,
labels=[66])])
route_4oMPLSo4.add_vpp_config()
p_4omo4 = (Ether(src=self.pg0.remote_mac,
dst=self.pg0.local_mac) /
IP(src="2.2.2.2", dst="1.1.2.22") /
UDP(sport=1234, dport=1234) /
Raw('\xa5' * 100))
rx = self.send_and_expect(self.pg0, self.pg1, p_4omo4*65)
for p in rx:
self.validate_outer4(p, udp_encap_1)
p = MPLS(p["UDP"].payload.load)
self.validate_inner4(p, p_4omo4, ttl=63)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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