LineageOS/android_packages_modules_Connectivity
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Test that if an RA sets the same prefix as DNS, nothing happens.

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This is not particularly likely to happen unless the pref64 RA is
sent by a different router than the main RA. But more tests are
always good, and this additional coverage will be more useful
in an upcoming change.

Bug: 150648313
Test: test-only change
Original-Change: https://android-review.googlesource.com/1316094
Merged-In: I3316d49d42100800740afadc4edf0a13a4d8377c
Change-Id: I3316d49d42100800740afadc4edf0a13a4d8377c
This commit is contained in:
Lorenzo Colitti
2020-05-24 11:30:55 +00:00
parent 9b616b851f
commit 0424f88915
1 changed files with 25 additions and 1 deletions
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26
tests/net/java/com/android/server/ConnectivityServiceTest.java
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@@ -6346,12 +6346,36 @@ public class ConnectivityServiceTest {
expectNat64PrefixChange(callback, mCellNetworkAgent, pref64FromDns);
inOrder.verify(mMockNetd).clatdStart(iface, pref64FromDns.toString());
// If the RA prefix reappears, clatd is restarted and prefix discovery is stopped.
// If an RA advertises the same prefix that was discovered by DNS, nothing happens: prefix
// discovery is not stopped, and there are no callbacks.
lp.setNat64Prefix(pref64FromDns);
mCellNetworkAgent.sendLinkProperties(lp);
callback.assertNoCallback();
inOrder.verify(mMockNetd, never()).clatdStop(iface);
inOrder.verify(mMockNetd, never()).clatdStart(eq(iface), anyString());
inOrder.verify(mMockDnsResolver, never()).stopPrefix64Discovery(netId);
inOrder.verify(mMockDnsResolver, never()).startPrefix64Discovery(netId);
// If the RA is later withdrawn, nothing happens again.
lp.setNat64Prefix(null);
mCellNetworkAgent.sendLinkProperties(lp);
callback.assertNoCallback();
inOrder.verify(mMockNetd, never()).clatdStop(iface);
inOrder.verify(mMockNetd, never()).clatdStart(eq(iface), anyString());
inOrder.verify(mMockDnsResolver, never()).stopPrefix64Discovery(netId);
inOrder.verify(mMockDnsResolver, never()).startPrefix64Discovery(netId);
// If the RA prefix changes, clatd is restarted and prefix discovery is stopped.
lp.setNat64Prefix(pref64FromRa);
mCellNetworkAgent.sendLinkProperties(lp);
expectNat64PrefixChange(callback, mCellNetworkAgent, pref64FromRa);
inOrder.verify(mMockNetd).clatdStop(iface);
inOrder.verify(mMockDnsResolver).stopPrefix64Discovery(netId);
// Stopping prefix discovery results in a prefix removed notification.
mService.mNetdEventCallback.onNat64PrefixEvent(netId, false /* added */,
pref64FromDnsStr, 96);
inOrder.verify(mMockNetd).clatdStart(iface, pref64FromRa.toString());
inOrder.verify(mMockDnsResolver, never()).startPrefix64Discovery(netId);