LOCKDOWN_VPN was in the FirewallChain IntDef but this was not a right
place because LOCKDOWN_VPN was not a valid value for Connectivity APIs
that take an argument annotated with @FirewallChain(setUidFirewallRule,
setFirewallChainEnabled, replaceFirewallChain).
LOCKDOWN_VPN was in the FirewallChain IntDef because
BpfNetMaps#setUidRule was used to add/remove LOCKDOWN_VPN entries.
This commit adds BpfNetMaps#updateUidLockdownRule and uses this to
add/remove LOCKDOWN_VPN entries instead of BpfNetMaps#setUidRule and
removes LOCKDOWN from FirewallChain.
Bug: 206482423
Test: atest TrafficControllerTest ConnectivityServiceTest
PermissionMonitorTest HostsideVpnTests#testBlockIncomingPacket
Change-Id: Iff9b9792fc0f208f153e10e396c6d5034b412d7c
Currently, even when VPN Lockdown mode is enabled, incoming packets are
not dropped if VPN is not connected.
This commit fixed this issue.
After this commit, If VPN Lockdown mode is enabled, incoming packets
are dropped regardless of the VPN connectivity.
Bug: 206482423
Test: atest TrafficControllerTest ConnectivityServiceTest PermissionMonitorTest
Change-Id: If52ece613c8aac1073355e43b6fb9cb3fcc87d1d
Tethering module.
Delete tagSocket(), privilegedTagSocket() and untagSocket() since
they are moved out of TrafficController in aosp/1849156.
Bug: 202086915
Test: m; flash; boot;
Change-Id: Ifeaeb060fbf1add9f06748e7846b9e11e0345bda
