tree cdeedf767f99ec9ca246d86384b429ceb2c12711
parent 71ae440ac218c12bbb5d0d7a4b7d1949eed79c4f
author Jeremy Joslin <jjoslin@google.com> 1470697657 -0700
committer Lorenzo Colitti <lorenzo@google.com> 1477043277 +0900

VPN network stat accounting changes.

Properly account for VPN apps that make heavy use of the tun
interface. Prior to this change a VPN app could be incorrectly charged
for more data than it actually used if it sent more traffic through
the tun interface than the underlying interface.

This change excludes VPN app traffic on the tun interface from the
adjustment pool and doesn't redistribute traffic to the VPN app.
Instead all of the redistributed traffic is deducted from the VPN app
which effectively represents any overhead incurred by the VPN app.

BUG: 30557871
Change-Id: I62a75a0c0c0111e052b7903baa9f5d6d94ef57fd