/*
* Copyright (c) 2016 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Midchain Adjacency sub-type. These adjs represent an L3 peer on a
* tunnel interface. The tunnel's adjacency is thus not the end of the chain,
* and needs to stack on/link to another chain (or portion of the graph) to
* reach the tunnel's destination.
*/
#ifndef __ADJ_MIDCHAIN_H__
#define __ADJ_MIDCHAIN_H__
#include <vnet/adj/adj.h>
/**
* @brief
* Convert an existing neighbour adjacency into a midchain
*
* @param adj_index
* The index of the neighbour adjacency.
*
* @param post_rewrite_node
* The VLIB graph node that provides the post-encap fixup.
* where 'fixup' is e.g., correcting chksum, length, etc.
*
* @param rewrite
* The rewrite.
*/
extern void adj_nbr_midchain_update_rewrite(adj_index_t adj_index,
adj_midchain_fixup_t fixup,
adj_flags_t flags,
u8 *rewrite);
/**
* @brief
* [re]stack a midchain. 'Stacking' is the act of forming parent-child
* relationships in the data-plane graph.
*
* @param adj_index
* The index of the midchain to stack
*
* @param dpo
* The parent DPO to stack onto (i.e. become a child of).
*/
extern void adj_nbr_midchain_stack(adj_index_t adj_index,
const dpo_id_t *dpo);
/**
* @brief
* unstack a midchain. This will break the chain between the midchain and
* the next graph section. This is a implemented as stack-on-drop
*
* @param adj_index
* The index of the midchain to stack
*/
extern void adj_nbr_midchain_unstack(adj_index_t adj_index);
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#!/usr/bin/env python
"""L2BD Multi-instance Test Case HLD:
**NOTES:**
- higher number of pg-l2 interfaces causes problems => only 15 pg-l2 \
interfaces in 5 bridge domains are tested
- jumbo packets in configuration with 14 l2-pg interfaces leads to \
problems too
**config 1**
- add 15 pg-l2 interfaces
- configure one host per pg-l2 interface
- configure 5 bridge domains (BD)
- add 3 pg-l2 interfaces per BD
**test 1**
- send L2 MAC frames between all pg-l2 interfaces of all BDs
**verify 1**
- check BD data by parsing output of bridge_domain_dump API command
- all packets received correctly
**config 2**
- update data of 5 BD
- disable learning, forwarding, flooding and uu_flooding for BD1
- disable forwarding for BD2
- disable flooding for BD3
- disable uu_flooding for BD4
- disable learning for BD5
**verify 2**
- check BD data by parsing output of bridge_domain_dump API command
**config 3**
- delete 2 BDs
**test 3**
- send L2 MAC frames between all pg-l2 interfaces of all BDs
- send L2 MAC frames between all pg-l2 interfaces formerly assigned to \
deleted BDs
**verify 3**
- check BD data by parsing output of bridge_domain_dump API command
- all packets received correctly on all 3 pg-l2 interfaces assigned to BDs
- no packet received on all 3 pg-l2 interfaces of all deleted BDs
**config 4**
- add 2 BDs
- add 3 pg-l2 interfaces per BD
**test 4**
- send L2 MAC frames between all pg-l2 interfaces of all BDs
**verify 4**
- check BD data by parsing output of bridge_domain_dump API command
- all packets received correctly
**config 5**
- delete 5 BDs
**verify 5**
- check BD data by parsing output of bridge_domain_dump API command
"""
import unittest
import random
from scapy.packet import Raw
from scapy.layers.l2 import Ether
from scapy.layers.inet import IP, UDP
from framework import VppTestCase, VppTestRunner, running_extended_tests
from util import Host, ppp
class TestL2bdMultiInst(VppTestCase):
""" L2BD Multi-instance Test Case """
@classmethod
def setUpClass(cls):
"""
Perform standard class setup (defined by class method setUpClass in
class VppTestCase) before running the test case, set test case related
variables and configure VPP.
"""
super(TestL2bdMultiInst, cls).setUpClass()
try:
# Create pg interfaces
n_bd = 5
cls.ifs_per_bd = ifs_per_bd = 3
n_ifs = n_bd * ifs_per_bd
cls.create_pg_interfaces(range(n_ifs))
# Packet flows mapping pg0 -> pg1, pg2 etc.
cls.flows = dict()
for b in range(n_bd):
bd_ifs = cls.bd_if_range(b + 1)
for j in bd_ifs:
cls.flows[cls.pg_interfaces[j]] = [
cls.pg_interfaces[x] for x in bd_ifs if x != j]
assert(
len(cls.flows[cls.pg_interfaces[j]]) == ifs_per_bd - 1)
# Mapping between packet-generator index and lists of test hosts
cls.hosts_by_pg_idx = dict()
# Create test host entries
cls.create_hosts(5)
# Packet sizes - jumbo packet (9018 bytes) skipped
cls.pg_if_packet_sizes = [64, 512, 1518]
# Set up all interfaces
for i in cls.pg_interfaces:
i.admin_up()
# Create list of BDs
cls.bd_list = list()
# Create list of deleted BDs
cls.bd_deleted_list = list()
# Create list of pg_interfaces in BDs
cls.pg_in_bd = list()
except Exception:
super(TestL2bdMultiInst, cls).tearDownClass()
raise
def setUp(self):
"""
Clear trace and packet infos before running each test.
"""
self.reset_packet_infos()
super(TestL2bdMultiInst, self).setUp()
def tearDown(self):
"""
Show various debug prints after each test.
"""
super(TestL2bdMultiInst, self).tearDown()
if not self.vpp_dead:
self.logger.info(self.vapi.ppcli("show l2fib verbose"))
self.logger.info(self.vapi.ppcli("show bridge-domain"))
@classmethod
def create_hosts(cls, hosts_per_if):
"""
Create required number of host MAC addresses and distribute them
among interfaces. Create host IPv4 address for every host MAC
address.
:param int hosts_per_if: Number of hosts per if to create MAC/IPv4
addresses for.
"""
c = hosts_per_if
assert(not cls.hosts_by_pg_idx)
for i in range(len(cls.pg_interfaces)):
pg_idx = cls.pg_interfaces[i].sw_if_index
cls.hosts_by_pg_idx[pg_idx] = [Host(
"00:00:00:ff:%02x:%02x" % (pg_idx, j + 1),
"172.17.1%02u.%u" % (pg_idx, j + 1)) for j in range(c)]
@classmethod
def bd_if_range(cls, b):
n = cls.ifs_per_bd
start = (b - 1) * n
return range(start, start + n)
def create_bd_and_mac_learn(self, count, start=1):
"""
Create required number of bridge domains with MAC learning enabled,
put 3 l2-pg interfaces to every bridge domain and send MAC learning
packets.
:param int count: Number of bridge domains to be created.
:param int start: Starting number of the bridge domain ID.
(Default value = 1)
"""
for b in range(start, start + count):
self.vapi.bridge_domain_add_del(bd_id=b)
self.logger.info("Bridge domain ID %d created" % b)
if self.bd_list.count(b) == 0:
self.bd_list.append(b)
if self.bd_deleted_list.count(b) == 1:
self.bd_deleted_list.remove(b)
for j in self.bd_if_range(b):
pg_if = self.pg_interfaces[j]
self.vapi.sw_interface_set_l2_bridge(pg_if.sw_if_index,
bd_id=b)
self.logger.info("pg-interface %s added to bridge domain ID %d"
% (pg_if.name, b))
self.pg_in_bd.append(pg_if)
hosts = self.hosts_by_pg_idx[pg_if.sw_if_index]
packets = [Ether(dst="ff:ff:ff:ff:ff:ff", src=host.mac)
for host in hosts]
pg_if.add_stream(packets)
self.logger.info("Sending broadcast eth frames for MAC learning")
self.pg_start()
self.logger.info(self.vapi.ppcli("show bridge-domain"))
self.logger.info(self.vapi.ppcli("show l2fib"))
def delete_bd(self, count, start=1):
"""
Delete required number of bridge domains.
:param int count: Number of bridge domains to be created.
:param int start: Starting number of the bridge domain ID.
(Default value = 1)
"""
for b in range(start, start + count):
for j in self.bd_if_range(b):
pg_if = self.pg_interfaces[j]
self.vapi.sw_interface_set_l2_bridge(pg_if.sw_if_index,
bd_id=b, enable=0)
self.pg_in_bd.remove(pg_if)
self.vapi.bridge_domain_add_del(bd_id=b, is_add=0)
self.bd_list.remove(b)
self.bd_deleted_list.append(b)
self.logger.info("Bridge domain ID %d deleted" % b)
def create_stream(self, src_if):
"""
Create input packet stream for defined interface using hosts list.
:param object src_if: Interface to create packet stream for.
:param list packet_sizes: List of required packet sizes.
:return: Stream of packets.
"""
packet_sizes = self.pg_if_packet_sizes
pkts = []
src_hosts = self.hosts_by_pg_idx[src_if.sw_if_index]
for dst_if in self.flows[src_if]:
dst_hosts = self.hosts_by_pg_idx[dst_if.sw_if_index]
for dst_host in dst_hosts:
pkt_info = self.create_packet_info(src_if, dst_if)
payload = self.info_to_payload(pkt_info)
src_host = random.choice(src_hosts)
p = (Ether(dst=dst_host.mac, src=src_host.mac) /
IP(src=src_host.ip4, dst=dst_host.ip4) /
UDP(sport=1234, dport=1234) /
Raw(payload))
pkt_info.data = p.copy()
size = random.choice(packet_sizes)
self.extend_packet(p, size)
pkts.append(p)
self.logger.debug("Input stream created for port %s. Length: %u pkt(s)"
% (src_if.name, len(pkts)))
return pkts
def verify_capture(self, dst_if):
"""
Verify captured input packet stream for defined interface.
:param object dst_if: Interface to verify captured packet stream for.
"""
last_info = dict()
for i in self.flows[dst_if]:
last_info[i.sw_if_index] = None
dst = dst_if.sw_if_index
for packet in dst_if.get_capture():
try:
ip = packet[IP]
udp = packet[UDP]
info = self.payload_to_info(str(packet[Raw]))
self.assertEqual(info.dst, dst)
self.logger.debug("Got packet on port %s: src=%u (id=%u)" %
(dst_if.name, info.src, info.index))
last_info[info.src] = self.get_next_packet_info_for_interface2(
info.src, dst, last_info[info.src])
pkt_info = last_info[info.src]
self.assertTrue(pkt_info is not None)
self.assertEqual(info.index, pkt_info.index)
# Check standard fields against saved data in pkt
saved = pkt_info.data
self.assertEqual(ip.src, saved[IP].src)
self.assertEqual(ip.dst, saved[IP].dst)
self.assertEqual(udp.sport, saved[UDP].sport)
self.assertEqual(udp.dport, saved[UDP].dport)
except:
self.logger.error(ppp("Unexpected or invalid packet:", packet))
raise
s = ""
remaining = 0
for src in self.flows[dst_if]:
remaining_packet = self.get_next_packet_info_for_interface2(
src.sw_if_index, dst, last_info[src.sw_if_index])
if remaining_packet is None:
s += "Port %u: Packet expected from source %u didn't arrive\n"\
% (dst, src.sw_if_index)
remaining += 1
self.assertNotEqual(0, remaining, s)
def set_bd_flags(self, bd_id, **args):
"""
Enable/disable defined feature(s) of the bridge domain.
:param int bd_id: Bridge domain ID.
:param list args: List of feature/status pairs. Allowed features: \
learn, forward, flood, uu_flood and arp_term. Status False means \
disable, status True means enable the feature.
:raise: ValueError in case of unknown feature in the input.
"""
for flag in args:
if flag == "learn":
feature_bitmap = 1 << 0
elif flag == "forward":
feature_bitmap = 1 << 1
elif flag == "flood":
feature_bitmap = 1 << 2
elif flag == "uu_flood":
feature_bitmap = 1 << 3
elif flag == "arp_term":
feature_bitmap = 1 << 4
else:
raise ValueError("Unknown feature used: %s" % flag)
is_set = 1 if args[flag] else 0
self.vapi.bridge_flags(bd_id, is_set, feature_bitmap)
self.logger.info("Bridge domain ID %d updated" % bd_id)
def verify_bd(self, bd_id, **args):
"""
Check if the bridge domain is configured and verify expected status
of listed features.
:param int bd_id: Bridge domain ID.
:param list args: List of feature/status pairs. Allowed features: \
learn, forward, flood, uu_flood and arp_term. Status False means \
disable, status True means enable the feature.
:return: 1 if bridge domain is configured, otherwise return 0.
:raise: ValueError in case of unknown feature in the input.
"""
bd_dump = self.vapi.bridge_domain_dump(bd_id)
if len(bd_dump) == 0:
self.logger.info("Bridge domain ID %d is not configured" % bd_id)
return 0
else:
bd_dump = bd_dump[0]
if len(args) > 0:
for flag in args:
expected_status = 1 if args[flag] else 0
if flag == "learn":
flag_status = bd_dump[6]
elif flag == "forward":
flag_status = bd_dump[5]
elif flag == "flood":
flag_status = bd_dump[3]
elif flag == "uu_flood":
flag_status = bd_dump[4]
elif flag == "arp_term":
flag_status = bd_dump[7]
else:
raise ValueError("Unknown feature used: %s" % flag)
self.assertEqual(expected_status, flag_status)
return 1
def run_verify_test(self):
"""
Create packet streams for all configured l2-pg interfaces, send all \
prepared packet streams and verify that:
- all packets received correctly on all pg-l2 interfaces assigned
to bridge domains
- no packet received on all pg-l2 interfaces not assigned to
bridge domains
:raise RuntimeError: if no packet captured on l2-pg interface assigned
to the bridge domain or if any packet is captured
on l2-pg interface not assigned to the bridge
domain.
"""
# Test
# Create incoming packet streams for packet-generator interfaces
# for pg_if in self.pg_interfaces:
assert(len(self._packet_count_for_dst_if_idx) == 0)
for pg_if in self.pg_in_bd:
pkts = self.create_stream(pg_if)
pg_if.add_stream(pkts)
# Enable packet capture and start packet sending
self.pg_enable_capture(self.pg_in_bd)
self.pg_start()
# Verify
# Verify outgoing packet streams per packet-generator interface
for pg_if in self.pg_in_bd:
self.verify_capture(pg_if)
def test_l2bd_inst_01(self):
""" L2BD Multi-instance test 1 - create 5 BDs
"""
# Config 1
# Create 5 BDs, put interfaces to these BDs and send MAC learning
# packets
self.create_bd_and_mac_learn(5)
# Verify 1
for bd_id in self.bd_list:
self.assertEqual(self.verify_bd(bd_id), 1)
# Test 1
# self.vapi.cli("clear trace")
self.run_verify_test()
def test_l2bd_inst_02(self):
""" L2BD Multi-instance test 2 - update data of 5 BDs
"""
# Config 2
# Update data of 5 BDs (disable learn, forward, flood, uu-flood)
self.set_bd_flags(self.bd_list[0], learn=False, forward=False,
flood=False, uu_flood=False)
self.set_bd_flags(self.bd_list[1], forward=False)
self.set_bd_flags(self.bd_list[2], flood=False)
self.set_bd_flags(self.bd_list[3], uu_flood=False)
self.set_bd_flags(self.bd_list[4], learn=False)
# Verify 2
# Skipping check of uu_flood as it is not returned by
# bridge_domain_dump api command
self.verify_bd(self.bd_list[0], learn=False, forward=False,
flood=False, uu_flood=False)
self.verify_bd(self.bd_list[1], learn=True, forward=False,
flood=True, uu_flood=True)
self.verify_bd(self.bd_list[2], learn=True, forward=True,
flood=False, uu_flood=True)
self.verify_bd(self.bd_list[3], learn=True, forward=True,
flood=True, uu_flood=False)
self.verify_bd(self.bd_list[4], learn=False, forward=True,
flood=True, uu_flood=True)
def test_l2bd_inst_03(self):
""" L2BD Multi-instance test 3 - delete 2 BDs
"""
# Config 3
# Delete 2 BDs
self.delete_bd(2)
# Verify 3
for bd_id in self.bd_deleted_list:
self.assertEqual(self.verify_bd(bd_id), 0)
for bd_id in self.bd_list:
self.assertEqual(self.verify_bd(bd_id), 1)
# Test 3
self.run_verify_test()
def test_l2bd_inst_04(self):
""" L2BD Multi-instance test 4 - add 2 BDs
"""
# Config 4
# Create 5 BDs, put interfaces to these BDs and send MAC learning
# packets
self.create_bd_and_mac_learn(2)
# Verify 4
for bd_id in self.bd_list:
self.assertEqual(self.verify_bd(bd_id), 1)
# Test 4
# self.vapi.cli("clear trace")
self.run_verify_test()
@unittest.skipUnless(running_extended_tests(), "part of extended tests")
def test_l2bd_inst_05(self):
""" L2BD Multi-instance test 5 - delete 5 BDs
"""
# Config 5
# Delete 5 BDs
self.delete_bd(5)
# Verify 5
for bd_id in self.bd_deleted_list:
self.assertEqual(self.verify_bd(bd_id), 0)
for bd_id in self.bd_list:
self.assertEqual(self.verify_bd(bd_id), 1)
if __name__ == '__main__':
unittest.main(testRunner=VppTestRunner)
