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#!/usr/bin/env python3
from socket import AF_INET, AF_INET6, inet_pton
import unittest
from ipaddress import IPv4Network
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP
from framework import VppTestCase, VppTestRunner
from vpp_interface import VppInterface
from vpp_ip_route import VppIpTable, VppIpRoute, VppRoutePath
from vpp_acl import AclRule, VppAcl, VppAclInterface
NUM_PKTS = 67
class VppPipe(VppInterface):
"""
VPP Pipe
"""
@property
def east(self):
return self.result.pipe_sw_if_index[1]
@property
def west(self):
return self.result.pipe_sw_if_index[0]
def __init__(self, test, instance=0xffffffff):
super(VppPipe, self).__init__(test)
self._test = test
self.instance = instance
def add_vpp_config(self):
self.result = self._test.vapi.pipe_create(
0 if self.instance == 0xffffffff else 1,
self.instance)
self.set_sw_if_index(self.result.sw_if_index)
def remove_vpp_config(self):
self._test.vapi.pipe_delete(
self.result.sw_if_index)
def object_id(self):
return "pipe-%d" % (self._sw_if_index)
def query_vpp_config(self):
pipes = self._test.vapi.pipe_dump()
for p in pipes:
if p.sw_if_index == self.result.sw_if_index:
return True
return False
def set_unnumbered(self, ip_sw_if_index, is_add=True):
res = self._test.vapi.sw_interface_set_unnumbered(ip_sw_if_index,
self.east, is_add)
res = self._test.vapi.sw_interface_set_unnumbered(ip_sw_if_index,
self.west, is_add)
class TestPipe(VppTestCase):
""" Pipes """
@classmethod
def setUpClass(cls):
super(TestPipe, cls).setUpClass()
@classmethod
def tearDownClass(cls):
super(TestPipe, cls).tearDownClass()
def setUp(self):
super(TestPipe, self).setUp()
self.create_pg_interfaces(range(4))
for i in self.pg_interfaces:
i.admin_up()
def tearDown(self):
for i in self.pg_interfaces:
i.admin_down()
super(TestPipe, self).tearDown()
def test_pipe(self):
""" Pipes """
pipes = [VppPipe(self), VppPipe(self, 10)]
for p in pipes:
p.add_vpp_config()
p.admin_up()
#
# L2 cross-connect pipe0 east with pg0 and west with pg1
#
self.vapi.sw_interface_set_l2_xconnect(self.pg0.sw_if_index,
pipes[0].east,
enable=1)
self.vapi.sw_interface_set_l2_xconnect(pipes[0].east,
self.pg0.sw_if_index,
enable=1)
self.vapi.sw_interface_set_l2_xconnect(self.pg1.sw_if_index,
pipes[0].west,
enable=1)
self.vapi.sw_interface_set_l2_xconnect(pipes[0].west,
self.pg1.sw_if_index,
enable=1)
# test bi-directional L2 flow pg0<->pg1
p = (Ether(src=self.pg0.remote_mac,
dst=self.pg1.remote_mac) /
IP(src="1.1.1.1",
dst="1.1.1.2") /
UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
self.send_and_expect(self.pg0, p * NUM_PKTS, self.pg1)
self.send_and_expect(self.pg1, p * NUM_PKTS, self.pg0)
#
# Attach ACL to ensure features are run on the pipe
#
rule_1 = AclRule(is_permit=0, proto=17,
src_prefix=IPv4Network("1.1.1.1/32"),
dst_prefix=IPv4Network("1.1.1.2/32"), ports=1234)
acl = VppAcl(self, rules=[rule_1])
acl.add_vpp_config()
# Apply the ACL on the pipe on output
acl_if_e = VppAclInterface(self, sw_if_index=pipes[0].east, n_input=0,
acls=[acl])
acl_if_e.add_vpp_config()
self.send_and_assert_no_replies(self.pg0, p * NUM_PKTS)
self.send_and_expect(self.pg1, p * NUM_PKTS, self.pg0)
# remove from output and apply on input
acl_if_e.remove_vpp_config()
acl_if_w = VppAclInterface(self, sw_if_index=pipes[0].west, n_input=1,
acls=[acl])
acl_if_w.add_vpp_config()
self.send_and_assert_no_replies(self.pg0, p * NUM_PKTS)
self.send_and_expect(self.pg1, p * NUM_PKTS, self.pg0)
acl_if_w.remove_vpp_config()
self.send_and_expect(self.pg0, p * NUM_PKTS, self.pg1)
self.send_and_expect(self.pg1, p * NUM_PKTS, self.pg0)
#
# L3 routes in two separate tables so a pipe can be used to L3
# x-connect
#
tables = []
tables.append(VppIpTable(self, 1))
tables.append(VppIpTable(self, 2))
for t in tables:
t.add_vpp_config()
self.pg2.set_table_ip4(1)
self.pg2.config_ip4()
self.pg2.resolve_arp()
self.pg3.set_table_ip4(2)
self.pg3.config_ip4()
self.pg3.resolve_arp()
routes = []
routes.append(VppIpRoute(self, "1.1.1.1", 32,
[VppRoutePath(self.pg3.remote_ip4,
self.pg3.sw_if_index)],
table_id=2))
routes.append(VppIpRoute(self, "1.1.1.1", 32,
[VppRoutePath("0.0.0.0", pipes[1].east)],
table_id=1))
routes.append(VppIpRoute(self, "1.1.1.2", 32,
[VppRoutePath("0.0.0.0", pipes[1].west)],
table_id=2))
routes.append(VppIpRoute(self, "1.1.1.2", 32,
[VppRoutePath(self.pg2.remote_ip4,
self.pg2.sw_if_index)],
table_id=1))
for r in routes:
r.add_vpp_config()
p_east = (Ether(src=self.pg2.remote_mac,
dst=self.pg2.local_mac) /
IP(src="1.1.1.2",
dst="1.1.1.1") /
UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
# bind the pipe ends to the correct tables
self.vapi.sw_interface_set_table(pipes[1].west, 0, 2)
self.vapi.sw_interface_set_table(pipes[1].east, 0, 1)
# IP is not enabled on the pipes at this point
self.send_and_assert_no_replies(self.pg2, p_east * NUM_PKTS)
# IP enable the Pipes by making them unnumbered
pipes[0].set_unnumbered(self.pg2.sw_if_index)
pipes[1].set_unnumbered(self.pg3.sw_if_index)
self.send_and_expect(self.pg2, p_east * NUM_PKTS, self.pg3)
# and the return path
p_west = (Ether(src=self.pg3.remote_mac,
dst=self.pg3.local_mac) /
IP(src="1.1.1.1",
dst="1.1.1.2") /
UDP(sport=1234, dport=1234) /
Raw(b'\xa5' * 100))
self.send_and_expect(self.pg3, p_west * NUM_PKTS, self.pg2)
#
# Use ACLs to test features run on the Pipes
#
acl_if_e1 = VppAclInterface(self, sw_if_index=pipes[1].east, n_input=0,
acls=[acl])
acl_if_e1.add_vpp_config()
self.send_and_assert_no_replies(self.pg2, p_east * NUM_PKTS)
self.send_and_expect(self.pg3, p_west * NUM_PKTS, self.pg2)
# remove from output and apply on input
acl_if_e1.remove_vpp_config()
acl_if_w1 = VppAclInterface(self, sw_if_index=pipes[1].west, n_input=1,
acls=[acl])
acl_if_w1.add_vpp_config()
self.send_and_assert_no_replies(self.pg2, p_east * NUM_PKTS)
self.send_and_expect(self.pg3, p_west * NUM_PKTS, self.pg2)
acl_if_w1.remove_vpp_config()
self.send_and_expect(self.pg2, p_east * NUM_PKTS, self.pg3)
self.send_and_expect(self.pg3, p_west * NUM_PKTS, self.pg2)
# cleanup (so the tables delete)
self.pg2.unconfig_ip4()
self.pg2.set_table_ip4(0)
self.pg3.unconfig_ip4()
self.pg3.set_table_ip4(0)
self.vapi.sw_interface_set_table(pipes[1].west, 0, 0)
self.vapi.sw_interface_set_table(pipes[1].east, 0, 0)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
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