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#!/usr/bin/env python
""" ACL plugin extended stateful tests """
import unittest
from framework import VppTestCase, VppTestRunner, running_extended_tests
from scapy.layers.l2 import Ether
from scapy.packet import Raw
from scapy.layers.inet import IP, UDP
from scapy.packet import Packet
from socket import inet_pton, AF_INET, AF_INET6
from scapy.layers.inet6 import IPv6, ICMPv6Unknown, ICMPv6EchoRequest
from scapy.layers.inet6 import ICMPv6EchoReply, IPv6ExtHdrRouting
from scapy.layers.inet6 import IPv6ExtHdrFragment
from pprint import pprint
from random import randint
def to_acl_rule(self, is_permit, wildcard_sport=False):
p = self
rule_family = AF_INET6 if p.haslayer(IPv6) else AF_INET
rule_prefix_len = 128 if p.haslayer(IPv6) else 32
rule_l3_layer = IPv6 if p.haslayer(IPv6) else IP
rule_l4_sport = p.sport
rule_l4_dport = p.dport
if p.haslayer(IPv6):
rule_l4_proto = p[IPv6].nh
else:
rule_l4_proto = p[IP].proto
if wildcard_sport:
rule_l4_sport_first = 0
rule_l4_sport_last = 65535
else:
rule_l4_sport_first = rule_l4_sport
rule_l4_sport_last = rule_l4_sport
new_rule = {
'is_permit': is_permit,
'is_ipv6': p.haslayer(IPv6),
'src_ip_addr': inet_pton(rule_family,
p[rule_l3_layer].src),
'src_ip_prefix_len': rule_prefix_len,
'dst_ip_addr': inet_pton(rule_family,
p[rule_l3_layer].dst),
'dst_ip_prefix_len': rule_prefix_len,
'srcport_or_icmptype_first': rule_l4_sport_first,
'srcport_or_icmptype_last': rule_l4_sport_last,
'dstport_or_icmpcode_first': rule_l4_dport,
'dstport_or_icmpcode_last': rule_l4_dport,
'proto': rule_l4_proto,
}
return new_rule
Packet.to_acl_rule = to_acl_rule
class IterateWithSleep():
def __init__(self, testcase, n_iters, description, sleep_sec):
self.curr = 0
self.testcase = testcase
self.n_iters = n_iters
self.sleep_sec = sleep_sec
self.description = description
def __iter__(self):
for x in range(0, self.n_iters):
yield x
self.testcase.sleep(self.sleep_sec)
class Conn():
def __init__(self, testcase, if1, if2, af, l4proto, port1, port2):
self.testcase = testcase
self.ifs = [None, None]
self.ifs[0] = if1
self.ifs[1] = if2
self.address_family = af
self.l4proto = l4proto
self.ports = [None, None]
self.ports[0] = port1
self.ports[1] = port2
self
def pkt(self, side):
is_ip6 = 1 if self.address_family == AF_INET6 else 0
s0 = side
s1 = 1-side
src_if = self.ifs[s0]
dst_if = self.ifs[s1]
layer_3 = [IP(src=src_if.remote_ip4, dst=dst_if.remote_ip4),
IPv6(src=src_if.remote_ip6, dst=dst_if.remote_ip6)]
payload = "x"
p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
layer_3[is_ip6] /
self.l4proto(sport=self.ports[s0], dport=self.ports[s1]) /
Raw(payload))
return p
def apply_acls(self, reflect_side, acl_side):
pkts = []
pkts.append(self.pkt(0))
pkts.append(self.pkt(1))
pkt = pkts[reflect_side]
r = []
r.append(pkt.to_acl_rule(2, wildcard_sport=True))
r.append(self.wildcard_rule(0))
res = self.testcase.api_acl_add_replace(0xffffffff, r)
self.testcase.assert_equal(res.retval, 0, "error adding ACL")
reflect_acl_index = res.acl_index
r = []
r.append(self.wildcard_rule(0))
res = self.testcase.api_acl_add_replace(0xffffffff, r)
self.testcase.assert_equal(res.retval, 0, "error adding deny ACL")
deny_acl_index = res.acl_index
if reflect_side == acl_side:
self.testcase.api_acl_interface_set_acl_list(
self.ifs[acl_side].sw_if_index, 2, 1,
[reflect_acl_index,
deny_acl_index])
self.testcase.api_acl_interface_set_acl_list(
self.ifs[1-acl_side].sw_if_index, 0, 0, [])
else:
self.testcase.api_acl_interface_set_acl_list(
self.ifs[acl_side].sw_if_index, 2, 1,
[deny_acl_index,
reflect_acl_index])
self.testcase.api_acl_interface_set_acl_list(
self.ifs[1-acl_side].sw_if_index, 0, 0, [])
def wildcard_rule(self, is_permit):
any_addr = ["0.0.0.0", "::"]
rule_family = self.address_family
is_ip6 = 1 if rule_family == AF_INET6 else 0
new_rule = {
'is_permit': is_permit,
'is_ipv6': is_ip6,
'src_ip_addr': inet_pton(rule_family, any_addr[is_ip6]),
'src_ip_prefix_len': 0,
'dst_ip_addr': inet_pton(rule_family, any_addr[is_ip6]),
'dst_ip_prefix_len': 0,
'srcport_or_icmptype_first': 0,
'srcport_or_icmptype_last': 65535,
'dstport_or_icmpcode_first': 0,
'dstport_or_icmpcode_last': 65535,
'proto': 0,
}
return new_rule
def send(self, side):
self.ifs[side].add_stream(self.pkt(side))
self.ifs[1-side].enable_capture()
self.testcase.pg_start()
def recv(self, side):
p = self.ifs[side].wait_for_packet(1)
return p
def send_through(self, side):
self.send(side)
p = self.recv(1-side)
return p
def send_pingpong(self, side):
p1 = self.send_through(side)
p2 = self.send_through(1-side)
return [p1, p2]
@unittest.skipUnless(running_extended_tests(), "part of extended tests")
class ACLPluginConnTestCase(VppTestCase):
""" ACL plugin connection-oriented extended testcases """
@classmethod
def setUpClass(self):
super(ACLPluginConnTestCase, self).setUpClass()
# create pg0 and pg1
self.create_pg_interfaces(range(2))
for i in self.pg_interfaces:
i.admin_up()
i.config_ip4()
i.config_ip6()
i.resolve_arp()
i.resolve_ndp()
def api_acl_add_replace(self, acl_index, r, count=-1, tag="",
expected_retval=0):
"""Add/replace an ACL
:param int acl_index: ACL index to replace, 4294967295 to create new.
:param acl_rule r: ACL rules array.
:param str tag: symbolic tag (description) for this ACL.
:param int count: number of rules.
"""
if (count < 0):
count = len(r)
return self.vapi.api(self.vapi.papi.acl_add_replace,
{'acl_index': acl_index,
'r': r,
'count': count,
'tag': tag
}, expected_retval=expected_retval)
def api_acl_interface_set_acl_list(self, sw_if_index, count, n_input, acls,
expected_retval=0):
return self.vapi.api(self.vapi.papi.acl_interface_set_acl_list,
{'sw_if_index': sw_if_index,
'count': count,
'n_input': n_input,
'acls': acls
}, expected_retval=expected_retval)
def api_acl_dump(self, acl_index, expected_retval=0):
return self.vapi.api(self.vapi.papi.acl_dump,
{'acl_index': acl_index},
expected_retval=expected_retval)
def run_basic_conn_test(self, af, acl_side):
""" Basic conn timeout test """
conn1 = Conn(self, self.pg0, self.pg1, af, UDP, 42001, 4242)
conn1.apply_acls(0, acl_side)
conn1.send_through(0)
# the return packets should pass
conn1.send_through(1)
# send some packets on conn1, ensure it doesn't go away
for i in IterateWithSleep(self, 20, "Keep conn active", 0.3):
conn1.send_through(1)
# allow the conn to time out
for i in IterateWithSleep(self, 30, "Wait for timeout", 0.1):
pass
# now try to send a packet on the reflected side
try:
p2 = conn1.send_through(1).command()
except:
# If we asserted while waiting, it's good.
# the conn should have timed out.
p2 = None
self.assert_equal(p2, None, "packet on long-idle conn")
def run_active_conn_test(self, af, acl_side):
""" Idle connection behind active connection test """
base = 10000 + 1000*acl_side
conn1 = Conn(self, self.pg0, self.pg1, af, UDP, base + 1, 2323)
conn2 = Conn(self, self.pg0, self.pg1, af, UDP, base + 2, 2323)
conn3 = Conn(self, self.pg0, self.pg1, af, UDP, base + 3, 2323)
conn1.apply_acls(0, acl_side)
conn1.send(0)
conn1.recv(1)
# create and check that the conn2/3 work
self.sleep(0.1)
conn2.send_pingpong(0)
self.sleep(0.1)
conn3.send_pingpong(0)
# send some packets on conn1, keep conn2/3 idle
for i in IterateWithSleep(self, 20, "Keep conn active", 0.2):
conn1.send_through(1)
try:
p2 = conn2.send_through(1).command()
except:
# If we asserted while waiting, it's good.
# the conn should have timed out.
p2 = None
# We should have not received the packet on a long-idle
# connection, because it should have timed out
# If it didn't - it is a problem
self.assert_equal(p2, None, "packet on long-idle conn")
def test_0000_conn_prepare_test(self):
""" Prepare the settings """
self.vapi.ppcli("set acl-plugin session timeout udp idle 1")
def test_0001_basic_conn_test(self):
""" IPv4: Basic conn timeout test reflect on ingress """
self.run_basic_conn_test(AF_INET, 0)
def test_0002_basic_conn_test(self):
""" IPv4: Basic conn timeout test reflect on egress """
self.run_basic_conn_test(AF_INET, 1)
def test_0011_active_conn_test(self):
""" IPv4: Idle conn behind active conn, reflect on ingress """
self.run_active_conn_test(AF_INET, 0)
def test_0012_active_conn_test(self):
""" IPv4: Idle conn behind active conn, reflect on egress """
self.run_active_conn_test(AF_INET, 1)
def test_1001_basic_conn_test(self):
""" IPv6: Basic conn timeout test reflect on ingress """
self.run_basic_conn_test(AF_INET6, 0)
def test_1002_basic_conn_test(self):
""" IPv6: Basic conn timeout test reflect on egress """
self.run_basic_conn_test(AF_INET6, 1)
def test_1011_active_conn_test(self):
""" IPv6: Idle conn behind active conn, reflect on ingress """
self.run_active_conn_test(AF_INET6, 0)
def test_1012_active_conn_test(self):
""" IPv6: Idle conn behind active conn, reflect on egress """
self.run_active_conn_test(AF_INET6, 1)
|
