1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
#!/usr/bin/python
# SPDX-License-Identifier: ISC
#
# test_tc_basic.py
#
# Copyright (c) 2022 by Shichu Yang
#
"""
test_tc_basic.py: Test basic TC filters, classes and qdiscs.
"""
import sys
import os
import pytest
import time
# Save the Current Working Directory to find configuration files.
CWD = os.path.dirname(os.path.realpath(__file__))
sys.path.append(os.path.join(CWD, "../"))
sys.path.append(os.path.join(CWD, "../lib/"))
from lib.topogen import Topogen, TopoRouter
from lib.topolog import logger
pytestmark = [pytest.mark.sharpd]
def build_topo(tgen):
"Build function"
r1 = tgen.add_router("r1")
r2 = tgen.add_router("r2")
# Create a p2p connection between r1 and r2
tgen.add_link(r1, r2)
# Create switches with each router connected to it to simulate a empty network.
switch = tgen.add_switch("s1")
switch.add_link(r1)
switch = tgen.add_switch("s2")
switch.add_link(r2)
# New form of setup/teardown using pytest fixture
@pytest.fixture(scope="module")
def tgen(request):
"Setup/Teardown the environment and provide tgen argument to tests"
# This function initiates the topology build with Topogen...
tgen = Topogen(build_topo, request.module.__name__)
# ... and here it calls initialization functions.
tgen.start_topology()
# This is a sample of configuration loading.
router_list = tgen.routers()
# For all routers arrange for:
# - starting zebra using config file from <rtrname>/zebra.conf
# - starting ospfd using an empty config file.
for _, router in router_list.items():
router.load_config(TopoRouter.RD_ZEBRA)
router.load_config(TopoRouter.RD_SHARP)
# Start and configure the router daemons
tgen.start_router()
# Provide tgen as argument to each test function
yield tgen
# Teardown after last test runs
tgen.stop_topology()
# Fixture that executes before each test
@pytest.fixture(autouse=True)
def skip_on_failure(tgen):
if tgen.routers_have_failure():
pytest.skip("skipped because of previous test failure")
def fetch_iproute2_tc_info(r, interface):
qdisc = r.cmd("tc qdisc show dev %s" % interface)
tclass = r.cmd("tc class show dev %s" % interface)
tfilter = r.cmd("tc filter show dev %s" % interface)
return qdisc, tclass, tfilter
# ===================
# The tests functions
# ===================
def test_tc_basic(tgen):
"Test installing one pair of filter & class by sharpd"
r1 = tgen.gears["r1"]
intf = "r1-eth0"
r1.vtysh_cmd(
"sharp tc dev %s source 192.168.100.0/24 destination 192.168.101.0/24 ip-protocol tcp src-port 8000 dst-port 8001 rate 20mbit"
% intf
)
time.sleep(3)
qdisc, tclass, tfilter = fetch_iproute2_tc_info(r1, intf)
logger.info("tc qdisc on %s: %s", intf, qdisc)
logger.info("tc class on %s: %s", intf, tclass)
logger.info("tc filter on %s: %s", intf, tfilter)
assert "htb" in qdisc
assert "beef:" in qdisc
assert "20Mbit" in tclass
assert "tcp" in tfilter
assert "dst_ip 192.168.101.0/24" in tfilter
assert "src_ip 192.168.100.0/24" in tfilter
assert "dst_port 8001" in tfilter
assert "src_port 8000" in tfilter
if __name__ == "__main__":
args = ["-s"] + sys.argv[1:]
sys.exit(pytest.main(args))
|
