Required because XDP offload needs input interface mac address
to be a part of the key. The mac address is used for checking
packets which are received from exceped input interface.
Test: atest TetheringCoverageTests, TetheringPrivilegedTests
Change-Id: Ied159454b516c0d70efe0a85744d1bb606892f2d
and more importantly unconditionally. This requires less effort
on the part of the in-kernel bpf verifier.
Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Ibaa94bf096fc81c4d984dfabf515131b1c81ef09
We've backported the necessary support to all 4.14+ ACK kernels,
but we can't actually enforce that these changes will be picked
up by all devices. Thus we can only make the full featured
implementations optional on [4.14..5.8) kernels, with a tcp-only
version for those 4.14+ devices where the full featured version
fails to load.
Note: there's still a fair bit of implementation work left
in the do_forward4() function itself. This is really just
the skeleton.
Test: atest, TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: If78123e00d55a77f2ecd7da1547581797e23f9b2
Currently, debugging the tethering programs is not easy because
in case of any failure they simply return TC_ACT_OK. This CL adds
a number of counters that the program can increment in the case
of interesting events such as malformed packets.
At the moment the counters are stored in a global tethering error
map, which is an ARRAY map of 32-bit counters. This should not
take up much space because there are only a dozen of these.
We might not need all of these counters. In future CLs we can
reduce the number of counters, or perhaps move them to a map of
maps so as to have separate counters on a per-interface basis.
Test: manual
Change-Id: I3fcd7eb8d318700092949ff2f39987bf4ba3656c
This provides a place to store common definitions that can be
used by both the programs and by JNI code in the tethering
module.
Over time much of the tethering-specific code in bpf_shared.h
could move here.
Test: m
Bug: 177884581
Change-Id: I4bf2c762d61cd5db003d59880e6bf7d107ff1a07
