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[nat64] check OMR prefix when selecting favored NAT64 prefix (#8995)

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This commit adds a check on OMR prefix before selecting AIL prefix as
the favored NAT64 prefix for publishing.
This commit is contained in:
Yi
2023-05-15 09:57:20 -07:00
committed by GitHub
parent fc08dd62f5
commit 73d3ea5449
5 changed files with 167 additions and 17 deletions
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tests/scripts/thread-cert/border_router/nat64/test_multi_border_routers.py
+9 -2
View File
@@ -49,6 +49,8 @@ ROUTER = 2
BR2 = 3
HOST = 4
OMR_PREFIX = "2000:0:1111:4444::/64"
NAT64_PREFIX_REFRESH_DELAY = 305
NAT64_STATE_DISABLED = 'disabled'
@@ -118,9 +120,15 @@ class Nat64MultiBorderRouter(thread_cert.TestCase):
self.simulator.go(config.BORDER_ROUTER_STARTUP_DELAY)
self.assertEqual('router', br2.get_state())
br2.add_prefix(OMR_PREFIX)
br2.register_netdata()
self.simulator.go(10)
self.simulator.go(10)
self.assertNotEqual(br1.get_br_favored_nat64_prefix(), br2.get_br_favored_nat64_prefix())
br1_local_nat64_prefix = br1.get_br_nat64_prefix()
br2_local_nat64_prefix = br2.get_br_nat64_prefix()
self.assertNotEqual(br2_local_nat64_prefix, br2.get_br_favored_nat64_prefix())
br2_infra_nat64_prefix = br2.get_br_favored_nat64_prefix()
self.assertEqual(len(br1.get_netdata_nat64_prefix()), 1)
@@ -164,8 +172,7 @@ class Nat64MultiBorderRouter(thread_cert.TestCase):
br2.nat64_set_enabled(True)
self.simulator.go(10)
self.assertNotEqual(br2_infra_nat64_prefix, br2.get_br_favored_nat64_prefix())
br2_local_nat64_prefix = br2.get_br_nat64_prefix()
self.assertEqual(br2_local_nat64_prefix, br2.get_br_favored_nat64_prefix())
self.assertEqual(len(br1.get_netdata_nat64_prefix()), 1)
nat64_prefix = br1.get_netdata_nat64_prefix()[0]
tests/scripts/thread-cert/border_router/nat64/test_with_infrastructure_prefix.py
+26 -7
View File
@@ -47,6 +47,7 @@ import thread_cert
BR = 1
ROUTER = 2
OMR_PREFIX = "2000:0:1111:4444::/64"
# The prefix is set smaller than the default infrastructure NAT64 prefix.
SMALL_NAT64_PREFIX = "2000:0:0:1:0:0::/96"
@@ -90,8 +91,26 @@ class Nat64SingleBorderRouter(thread_cert.TestCase):
self.simulator.go(config.ROUTER_STARTUP_DELAY)
self.assertEqual('router', router.get_state())
# Case 1 BR advertise the infrastructure prefix
infra_nat64_prefix = br.get_br_favored_nat64_prefix()
# Case 1 No infra-derived OMR prefix. BR publishes its local prefix.
local_nat64_prefix = br.get_br_nat64_prefix()
self.assertEqual(len(br.get_netdata_nat64_prefix()), 1)
nat64_prefix = br.get_netdata_nat64_prefix()[0]
self.assertEqual(nat64_prefix, local_nat64_prefix)
self.assertDictIncludes(br.nat64_state, {
'PrefixManager': NAT64_STATE_ACTIVE,
'Translator': NAT64_STATE_ACTIVE
})
# Case 2 Add OMR prefix. BR publishes the infrastructure nat64 prefix
br.add_prefix(OMR_PREFIX)
br.register_netdata()
self.simulator.go(10)
favored_nat64_prefix = br.get_br_favored_nat64_prefix()
self.assertNotEqual(favored_nat64_prefix, local_nat64_prefix)
infra_nat64_prefix = favored_nat64_prefix
self.assertEqual(len(br.get_netdata_nat64_prefix()), 1)
nat64_prefix = br.get_netdata_nat64_prefix()[0]
@@ -101,7 +120,7 @@ class Nat64SingleBorderRouter(thread_cert.TestCase):
'Translator': NAT64_STATE_NOT_RUNNING
})
# Case 2 Withdraw infrastructure prefix when a smaller prefix in medium
# Case 3 Unpublish infrastructure prefix when a smaller prefix in medium
# preference is present
br.add_route(SMALL_NAT64_PREFIX, stable=False, nat64=True, prf='med')
br.register_netdata()
@@ -121,7 +140,7 @@ class Nat64SingleBorderRouter(thread_cert.TestCase):
self.assertEqual(len(br.get_netdata_nat64_prefix()), 1)
self.assertEqual(nat64_prefix, infra_nat64_prefix)
# Case 3 No change when a smaller prefix in low preference is present
# Case 4 No change when a smaller prefix in low preference is present
br.add_route(SMALL_NAT64_PREFIX, stable=False, nat64=True, prf='low')
br.register_netdata()
self.simulator.go(5)
@@ -137,7 +156,7 @@ class Nat64SingleBorderRouter(thread_cert.TestCase):
br.register_netdata()
self.simulator.go(5)
# Case 4 Infrastructure nat64 prefix no longer presents
# Case 5 Infrastructure nat64 prefix no longer presents
br.bash("service bind9 stop")
self.simulator.go(NAT64_PREFIX_REFRESH_DELAY)
@@ -150,7 +169,7 @@ class Nat64SingleBorderRouter(thread_cert.TestCase):
'Translator': NAT64_STATE_ACTIVE
})
# Case 5 Infrastructure nat64 prefix is recovered
# Case 6 Infrastructure nat64 prefix is recovered
br.bash("service bind9 start")
self.simulator.go(NAT64_PREFIX_REFRESH_DELAY)
@@ -162,7 +181,7 @@ class Nat64SingleBorderRouter(thread_cert.TestCase):
'Translator': NAT64_STATE_NOT_RUNNING
})
# Case 6 Change infrastructure nat64 prefix
# Case 7 Change infrastructure nat64 prefix
br.bash("sed -i 's/dns64 /\/\/dns64 /' /etc/bind/named.conf.options")
br.bash("sed -i '/\/\/dns64 /a dns64 " + SMALL_NAT64_PREFIX + " {};' /etc/bind/named.conf.options")
br.bash("service bind9 restart")