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test-network: add test case for ndisc MTU option

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This commit is contained in:
Yu Watanabe 2024-04-10 11:14:13 +09:00
parent 8c9ef90b19
commit a0430b0d95
2 changed files with 48 additions and 0 deletions
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6
test/test-network/conf/25-veth-peer-no-address.network Normal file
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@ -0,0 +1,6 @@
# SPDX-License-Identifier: LGPL-2.1-or-later
[Match]
Name=veth-peer
[Network]
IPv6AcceptRA=no

42
test/test-network/systemd-networkd-tests.py
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@ -5572,6 +5572,48 @@ class NetworkdRATests(unittest.TestCase, Utilities):
self.wait_route_dropped('veth99', 'proto redirect', ipv='-6', timeout_sec=10)
self.wait_route_dropped('veth99', 'proto ra', ipv='-6', timeout_sec=10)
def check_ndisc_mtu(self, mtu):
for _ in range(20):
output = read_ipv6_sysctl_attr('veth99', 'mtu')
if output == f'{mtu}':
break
time.sleep(0.5)
else:
self.fail(f'IPv6 MTU does not matches: value={output}, expected={mtu}')
def test_ndisc_mtu(self):
if not os.path.exists(test_ndisc_send):
self.skipTest(f"{test_ndisc_send} does not exist.")
copy_network_unit('25-veth.netdev',
'25-veth-peer-no-address.network',
'25-ipv6-prefix-veth-token-static.network')
start_networkd()
self.wait_online('veth-peer:degraded')
for _ in range(20):
output = read_networkd_log()
if 'veth99: NDISC: Started IPv6 Router Solicitation client' in output:
break
time.sleep(0.5)
else:
self.fail('sd-ndisc does not started on veth99.')
check_output(f'{test_ndisc_send} --interface veth-peer --type ra --lifetime 1hour --mtu 1400')
self.check_ndisc_mtu(1400)
check_output(f'{test_ndisc_send} --interface veth-peer --type ra --lifetime 1hour --mtu 1410')
self.check_ndisc_mtu(1410)
check_output('ip link set dev veth99 mtu 1600')
self.check_ndisc_mtu(1410)
check_output(f'{test_ndisc_send} --interface veth-peer --type ra --lifetime 1hour --mtu 1700')
self.check_ndisc_mtu(1600)
check_output('ip link set dev veth99 mtu 1800')
self.check_ndisc_mtu(1700)
def test_ipv6_token_prefixstable(self):
copy_network_unit('25-veth.netdev', '25-ipv6-prefix.network', '25-ipv6-prefix-veth-token-prefixstable.network')
start_networkd()