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test_interface_crud.py
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#!/usr/bin/env python3
"""CRUD tests of APIs (Create, Read, Update, Delete) HLD:
- interface up/down/add/delete - interface type:
- pg (TBD)
- loopback
- vhostuser (TBD)
- af_packet (TBD)
- netmap (TBD)
- tuntap (root privileges needed)
- vxlan (TBD)
"""
import unittest
from scapy.layers.inet import IP, ICMP
from scapy.layers.l2 import Ether
from framework import VppTestCase, VppTestRunner
class TestLoopbackInterfaceCRUD(VppTestCase):
"""CRUD Loopback
"""
@classmethod
def setUpClass(cls):
super(TestLoopbackInterfaceCRUD, cls).setUpClass()
try:
cls.create_pg_interfaces(range(1))
for i in cls.pg_interfaces:
i.config_ip4().resolve_arp()
except:
cls.tearDownClass()
raise
@classmethod
def tearDownClass(cls):
super(TestLoopbackInterfaceCRUD, cls).tearDownClass()
@staticmethod
def create_icmp_stream(src_if, dst_ifs):
"""
:param VppInterface src_if: Packets are send to this interface,
using this interfaces remote host.
:param list dst_ifs: IPv4 ICMP requests are send to interfaces
addresses.
:return: List of generated packets.
"""
pkts = []
for i in dst_ifs:
p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) /
IP(src=src_if.remote_ip4, dst=i.local_ip4) /
ICMP(id=i.sw_if_index, type='echo-request'))
pkts.append(p)
return pkts
def verify_icmp(self, capture, request_src_if, dst_ifs):
"""
:param capture: Capture to verify.
:param VppInterface request_src_if: Interface where was send packets.
:param list dst_ifs: Interfaces where was generated IPv4 ICMP requests.
"""
rcvd_icmp_pkts = []
for pkt in capture:
try:
ip = pkt[IP]
icmp = pkt[ICMP]
except IndexError:
pass
else:
info = (ip.src, ip.dst, icmp.type, icmp.id)
rcvd_icmp_pkts.append(info)
for i in dst_ifs:
# 0 - icmp echo response
info = (i.local_ip4, request_src_if.remote_ip4, 0, i.sw_if_index)
self.assertIn(info, rcvd_icmp_pkts)
def test_crud(self):
# create
loopbacks = self.create_loopback_interfaces(20)
for i in loopbacks:
i.local_ip4_prefix_len = 32
i.config_ip4().admin_up()
# read (check sw if dump, ip4 fib, ip6 fib)
if_dump = self.vapi.sw_interface_dump(name_filter_valid=True,
name_filter='loop')
fib4_dump = self.vapi.ip_route_dump(0)
for i in loopbacks:
self.assertTrue(i.is_interface_config_in_dump(if_dump))
self.assertTrue(i.is_ip4_entry_in_fib_dump(fib4_dump))
if_dump = self.vapi.sw_interface_dump(name_filter_valid=True,
name_filter='loopXYZ')
self.assertEqual(len(if_dump), 0)
# check ping
stream = self.create_icmp_stream(self.pg0, loopbacks)
self.pg0.add_stream(stream)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
capture = self.pg0.get_capture(expected_count=len(stream))
self.verify_icmp(capture, self.pg0, loopbacks)
# delete
for i in loopbacks:
i.remove_vpp_config()
# read (check not in sw if dump, ip4 fib, ip6 fib)
if_dump = self.vapi.sw_interface_dump()
fib4_dump = self.vapi.ip_route_dump(0)
for i in loopbacks:
self.assertFalse(i.is_interface_config_in_dump(if_dump))
self.assertFalse(i.is_ip4_entry_in_fib_dump(fib4_dump))
# check not ping
stream = self.create_icmp_stream(self.pg0, loopbacks)
self.pg0.add_stream(stream)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.pg0.assert_nothing_captured()
def test_down(self):
# create
loopbacks = self.create_loopback_interfaces(20)
for i in loopbacks:
i.local_ip4_prefix_len = 32
i.config_ip4().admin_up()
# disable
for i in loopbacks:
i.admin_down().unconfig_ip4()
# read (check not in sw if dump, ip4 fib, ip6 fib)
if_dump = self.vapi.sw_interface_dump()
fib4_dump = self.vapi.ip_route_dump(0)
for i in loopbacks:
self.assertTrue(i.is_interface_config_in_dump(if_dump))
self.assertFalse(i.is_ip4_entry_in_fib_dump(fib4_dump))
# check not ping
stream = self.create_icmp_stream(self.pg0, loopbacks)
self.pg0.add_stream(stream)
self.pg_enable_capture(self.pg_interfaces)
self.pg_start()
self.pg0.assert_nothing_captured()
class TestInterfaceDumpApiLocalOnly(VppTestCase):
"""test_interface_crud.TestInterfaceDumpApiLocalOnly"""
def test_sw_if_index_0(self):
rv = self.vapi.sw_interface_dump(sw_if_index=0)
self.assertEqual(rv[0].sw_if_index, 0)
def test_sw_if_index_twiddle0(self):
rv = self.vapi.sw_interface_dump(sw_if_index=0xffffffff)
self.assertEqual(rv[0].sw_if_index, 0)
def test_sw_if_index_1_not_existing(self):
rv = self.vapi.sw_interface_dump(sw_if_index=1)
self.assertEqual(len(rv), 0, 'expected no records.')
class TestInterfaceDumpApi(VppTestCase):
"""test_interface_crud.TestInterfaceDumpApi"""
def test_sw_if_index_1(self):
self.vapi.create_loopback_instance(is_specified=1,
user_instance=10)
self.vapi.create_loopback_instance(is_specified=1,
user_instance=5)
# Can I get back the specified record?
rv = self.vapi.sw_interface_dump(sw_if_index=1)
self.assertEqual(rv[0].sw_if_index, 1, rv)
# verify 3 interfaces
rv = self.vapi.sw_interface_dump(sw_if_index=0xffffffff)
self.assertEqual(len(rv), 3, 'Expected 3 interfaces.')
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)