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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/unit/test_routing_manager.cpp
+118
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@@ -158,6 +158,7 @@ void ValidateRouterAdvert(const Icmp6Packet &aPacket);
const char *PreferenceToString(int8_t aPreference);
void SendRouterAdvert(const Ip6::Address &aAddress, const Icmp6Packet &aPacket);
void SendNeighborAdvert(const Ip6::Address &aAddress, const Ip6::Nd::NeighborAdvertMessage &aNaMessage);
void DiscoverNat64Prefix(const Ip6::Prefix &aPrefix);
#if OPENTHREAD_CONFIG_LOG_OUTPUT == OPENTHREAD_CONFIG_LOG_OUTPUT_PLATFORM_DEFINED
void otPlatLog(otLogLevel aLogLevel, otLogRegion aLogRegion, const char *aFormat, ...)
@@ -502,6 +503,13 @@ void SendNeighborAdvert(const Ip6::Address &aAddress, const Ip6::Nd::NeighborAdv
sizeof(aNaMessage));
}
void DiscoverNat64Prefix(const Ip6::Prefix &aPrefix)
{
Log("Discovered NAT64 prefix %s", aPrefix.ToString().AsCString());
otPlatInfraIfDiscoverNat64PrefixDone(sInstance, kInfraIfIndex, &aPrefix);
}
Ip6::Prefix PrefixFromString(const char *aString, uint8_t aPrefixLength)
{
Ip6::Prefix prefix;
@@ -589,6 +597,31 @@ void VerifyExternalRouteInNetData(ExternalRouteMode aMode)
}
}
void VerifyNat64PrefixInNetData(const Ip6::Prefix &aNat64Prefix)
{
otNetworkDataIterator iterator = OT_NETWORK_DATA_ITERATOR_INIT;
NetworkData::ExternalRouteConfig routeConfig;
bool didFind = false;
Log("VerifyNat64PrefixInNetData()");
while (otNetDataGetNextRoute(sInstance, &iterator, &routeConfig) == kErrorNone)
{
if (!routeConfig.mNat64 || !routeConfig.GetPrefix().IsValidNat64())
{
continue;
}
Log(" nat64 prefix:%s, prf:%s", routeConfig.GetPrefix().ToString().AsCString(),
PreferenceToString(routeConfig.mPreference));
VerifyOrQuit(routeConfig.GetPrefix() == aNat64Prefix);
didFind = true;
}
VerifyOrQuit(didFind);
}
struct Pio
{
Pio(const Ip6::Prefix &aPrefix, uint32_t aValidLifetime, uint32_t aPreferredLifetime)
@@ -3003,6 +3036,88 @@ void TestAutoEnableOfSrpServer(void)
}
#endif // OPENTHREAD_CONFIG_SRP_SERVER_ENABLE
#if OPENTHREAD_CONFIG_NAT64_BORDER_ROUTING_ENABLE
void TestNat64PrefixSelection(void)
{
Ip6::Prefix localNat64;
Ip6::Prefix ailNat64 = PrefixFromString("2000:0:0:1:0:0::", 96);
Ip6::Prefix localOmr;
Ip6::Prefix omrPrefix = PrefixFromString("2000:0000:1111:4444::", 64);
NetworkData::OnMeshPrefixConfig prefixConfig;
Log("--------------------------------------------------------------------------------------------");
Log("TestNat64PrefixSelection");
InitTest();
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Start Routing Manager. Check local NAT64 prefix generation.
SuccessOrQuit(sInstance->Get<BorderRouter::RoutingManager>().SetEnabled(true));
SuccessOrQuit(sInstance->Get<BorderRouter::RoutingManager>().GetNat64Prefix(localNat64));
SuccessOrQuit(sInstance->Get<BorderRouter::RoutingManager>().GetOmrPrefix(localOmr));
Log("Local nat64 prefix is %s", localNat64.ToString().AsCString());
Log("Local OMR prefix is %s", localOmr.ToString().AsCString());
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Enable Nat64 Prefix Manager. Check local NAT64 prefix in Network Data.
sInstance->Get<BorderRouter::RoutingManager>().SetNat64PrefixManagerEnabled(true);
AdvanceTime(20000);
VerifyOmrPrefixInNetData(localOmr);
VerifyNat64PrefixInNetData(localNat64);
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// AIL NAT64 prefix discovered. No infra-derived OMR prefix in Network Data.
// Check local NAT64 prefix in Network Data.
DiscoverNat64Prefix(ailNat64);
AdvanceTime(20000);
VerifyNat64PrefixInNetData(localNat64);
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Add a medium preference OMR prefix into Network Data.
// Check AIL NAT64 prefix published in Network Data.
prefixConfig.Clear();
prefixConfig.mPrefix = omrPrefix;
prefixConfig.mStable = true;
prefixConfig.mSlaac = true;
prefixConfig.mPreferred = true;
prefixConfig.mOnMesh = true;
prefixConfig.mDefaultRoute = false;
prefixConfig.mPreference = NetworkData::kRoutePreferenceMedium;
SuccessOrQuit(otBorderRouterAddOnMeshPrefix(sInstance, &prefixConfig));
SuccessOrQuit(otBorderRouterRegister(sInstance));
AdvanceTime(20000);
VerifyOmrPrefixInNetData(omrPrefix);
VerifyNat64PrefixInNetData(ailNat64);
//- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// AIL NAT64 prefix removed.
// Check local NAT64 prefix in Network Data.
ailNat64.Clear();
DiscoverNat64Prefix(ailNat64);
AdvanceTime(20000);
VerifyOmrPrefixInNetData(omrPrefix);
VerifyNat64PrefixInNetData(localNat64);
Log("End of TestNat64PrefixSelection");
FinalizeTest();
}
#endif // OPENTHREAD_CONFIG_NAT64_BORDER_ROUTING_ENABLE
#endif // OPENTHREAD_CONFIG_BORDER_ROUTING_ENABLE
int main(void)
@@ -3025,6 +3140,9 @@ int main(void)
#if OPENTHREAD_CONFIG_SRP_SERVER_ENABLE
TestAutoEnableOfSrpServer();
#endif
#if OPENTHREAD_CONFIG_NAT64_BORDER_ROUTING_ENABLE
TestNat64PrefixSelection();
#endif
printf("All tests passed\n");
#else