tree f3ebfafab106d51e87320359f29e8e1d8632bda7
parent 41417ca64a417a88dd4d325ae01bfdf3d36029f3
author Lorenzo Colitti <lorenzo@google.com> 1557488023 -0700
committer Lorenzo Colitti <lorenzo@google.com> 1576063180 +0900

Support strict mode private DNS on VPNs that provide Internet.

Currently, strict mode private DNS does not work on VPNs because
NetworkMonitor does not validate VPNs. When a VPN connects, it
immediately transitions to ValidatedState, skipping private DNS
hostname resolution.

This change makes NetworkMonitor perform private DNS hostname
resolution and evaluation even on VPNs.

In order to ensure that the system always immediately switches to
the VPN as soon as it connects, remove the unvalidated penalty
for VPN networks. This ensures that the VPN score is always 101
and the VPN always outscores other networks as soon as it
connects. Previously, it would only outscore other networks
when no-op validation completed.

Backport of 1a26465d925c639579e6c5f52a29bbda2d97b18e.

Bug: 122652057
Test: atest FrameworksNetTests
Test: manually ran a VPN with private DNS in strict mode
Test: atest android.net.cts.ConnectivityManagerTest com.android.cts.net.HostsideVpnTests
Change-Id: Iaa78a7edcf23755c89d7b354edbc28d37d74d891
Merged-In: Iaa78a7edcf23755c89d7b354edbc28d37d74d891