In the current tethering code, upstream selection is only
triggered by CONNECTIVITY_ACTION. But in automatic mode, the
upstream network is selected by listening to a NetworkCallback
that tracks the default network.
This causes a race where if the CONNECTIVITY_ACTION for a network
switch is received and processed before the callbacks for that
network switch, upstream selection just re-selects the upstream
currently in use.
Make it possible to test this by giving TestConnectivityManager
the ability to choose the ordering between NetworkCallbacks and
CONNECTIVITY_ACTION, and to run an arbitrary Runnable between
calling one and calling the other. TetheringTest passes a
Runnable that calls mLooper.dispatchAll(), which ensures that
the tethering code fully processes the first set of information
it receives (either the broadcast (or the callbacks) before
receiving any more information.
Add test coverage to testAutomaticUpstreamSelection that
exercises various orderings, and make the test pass by expecting
the buggy behaviour of the current code.
An upcoming CL will fix the bug and update the tests.
Bug: 173068192
Test: test-only change
Change-Id: I7805444dcf59f6d5f8517fbcf2f2b1641783d50b
This is needed for forwarding to work, so it should be dumped.
New output:
Forwarding rules:
29(29) -> 14(rmnet2) 86dd 00:00:00:00:00:00 00:00:00:00:00:00
[ap_br_wlan2]: iif(iface) oif(iface) v6addr srcmac dstmac
14(rmnet2) 29(ap_br_wlan2) 2001:240:2423:13fa:3c21:e35a:6a59:ff8a da:17:fd:70:3d:14 26:5b:b2:ee:bc:ba
IPv4: [inDstMac] iif(iface) src -> nat -> dst
[da:17:fd:70:3d:14] 29(29) 192.168.222.151:39208 -> 14(rmnet2) 100.102.14.231:39208 -> 172.217.175.3:80
[da:17:fd:70:3d:14] 29(29) 192.168.222.151:47386 -> 14(rmnet2) 100.102.14.231:47386 -> 216.58.197.196:443
Also add a call to getHostAddress() to remove the / on IPv6
forwarding rules.
Test: manual
Change-Id: I347ea5a3fd88c51f1fae0c76c75dfa30c68a55ad
These members are public mutable and their names are confusing.
Make them package-private and final.
Bug: 173068192
Test: test-only change
Change-Id: I87131c48f67b6614c25aa99e1cbc53196f49aa7c
Currently, TestConnectivityManager immediately sends all
callbacks and broadcasts to the Tethering code as soon as the
test code makes any change.
This makes it impossible to affect the order in which those
events are delivered to the Tethering code, so it is not possible
to test for races.
Fix some of this as follows:
1. Make TestConnectivityManager post all its callbacks to the
handlers that Tethering registered them with.
2. In TetheringTest, use the existing TestLooper object to
advance time manually. Also use setUseRegisteredHandlers to
ensure that the broadcasts are sent in order. This requires
calling dispatchAll() after sending the broadcast to preserve
the existing synchronous behaviour. Take advantage of that to
remove lots of existing dispatchAll calls.
3. Add a TestLooper to UpstreamNetworkMonitorTest and use it.
Keep the test passing by adding lots of mLooper.dispatchAll(),
which is a bit ugly but probably acceptable given the
additional coverage it provides.
This exposes an existing bug in the code where if upstream
selection is in automatic mode, and all CONNECTIVITY_ACTION
broadcasts are received before all NetworkCallbacks, the code
does not switch upstream.
In order to make the tests pass, re-order the CONNECTIVITY_ACTION
broadcasts with the NetworkCallbacks in TestConnectivityManager
so as not to trigger the bug. A future CL will make the order
configurable.
While I'm at it, switch TestConnectivityManager from HashMap to
ArrayMap, which is generally preferred for maps that do not
contain too many elements.
Bug: 173068192
Test: test-only change
Change-Id: I964f365c691fbc396ab0a87f292bd32b123011fe
Currently, Tethering files NetworkRequests even when
config_tether_upstream_automatic is enabled. This is incorrect:
when the automatic upstream selection is enabled, the tethering
upstream should always follow the default network and there is
no need to file any requests.
These requests are harmful when tethering is not using cellular
as its upstream, because:
- If the device does not use mobile data always on, the request
causes the cellular network to be brought up, causing power
draw.
- Even if the device does use mobile data always on, the request
causes the cellular network to come to the foreground, which
allows all apps to access it, causing potential data usage.
Amend the existing testGetCurrentPreferredUpstream to cover these
changes, by making that test case always set automatic upstream
mode. This does not result in any loss of meaningful test
coverage, because getCurrentPreferredUpstream is only ever called
when chooseUpstreamAutomatically is enabled.
Bug: 173068192
Test: atest TetheringTests
Change-Id: I068a5338699a3ed04f24f97f785ea89ff5890e50
UpstreamNetworkMonitor is the part of tethering that files
NetworkRequests for upstream netwoks, but it currently does not
know all the requirements for upstream selection. For example, it
does not know whether automatic upstream selection is in use.
This forces the upstream selection code to be split between
UpstreamNetworkMonitor and Tethering. This makes it difficult to
follow.
This CL ensures that all information about upstream requirements
(DUN required, automatic upstream selection, tryCell) is passed
to UpstreamNetworkMonitor so it can be aware of it.
This CL also removes the ability for UpstreamNetworkMonitor's
callers to call registerMobileNetworkRequest or
releaseMobileNetworkRequest. In a future CL, this will be
automatically done by UpstreamNetworkMonitor depending on the
upstream requirements.
This CL is a no-op refactoring with no behaviour changes.
Bug: 173068192
Test: atest TetheringTests
Change-Id: I174f765c616e0dbe2aa493c12613e6131cff0666
TrafficStatsConstants.TAG_SYSTEM_NEIGHBOR is moved to
NetworkStackConstants so update the import class name for it.
Bug: 182349970
Test: FrameworksNetTests
NetworkStackTests
TetheringTests
Change-Id: I8fcd2772ed873d318233d3029184e4352245d4cd
Merged-In: I8fcd2772ed873d318233d3029184e4352245d4cd
Should not {start, stop} conntrack event monitor on R because
it is used by S feature.
Test: atest TetheringCoverageTests
Change-Id: I57a0a84d46e973660b24fc10d314820ada0d45b9
Starting conntrack event monitor on R devices is unnecessary because
no code uses them.
Bug: 177884581
Test: atest TetheringCoverageTests
Change-Id: I036cb8e29b32a4e220da9a52849b978a6ab821e4
Because most of the tethering tests are unprivileged, we cannot
test this code on real sockets. So use an AF_UNIX socketpair.
Bug: 154669942
Bug: 182785371
Test: test-only change
Change-Id: I843fddb3aaeab33628438f3bcd6a4166062de962
Opening the maps on R devices is unnecessary (because no code
uses them) and unsafe (because the maps might actually be in a
different format than expected by the module).
Always return null when opening the maps, so the code will safely
fall back to using netd for anything.
This only affects dump(). The production code never opens the
maps except via the shim, and only the S shim opens the maps.
Also check isAtLeastS in dumpCounters, because it opens the map
directly.
Bug: 177884581
Test: builds, boots, "dumpsys tethering" shows expected output
Change-Id: I5884490a5cc40fc529a12100ae5baaeae6a18f30
The APK was added to the standard APEX, but is missing in the
in-process APEX.
Bug: 182557971
Merged-In: Ic2491f04880ff66abc3b2d3aaee6168e18f6d68a
Merged-In: Ibf982ceb5f0fd61c822399e3eeeb1ef5e500604d
Change-Id: Ibf982ceb5f0fd61c822399e3eeeb1ef5e500604d
Test: m
Currently, upstream selection is split between the Tethering and
UpstreamNetworkMonitor classes. The UpstreamNetworkMonitor bits
are unit tested, but there are no tests for the interaction of
the two. Add a simple test.
In order to do this, remove the code that controls the
UpstreamNetworkMonitor spy from prepareUsbTethering. This is so
that the new test can call prepareUsbTethering but still rely on
the behaviour of the actual UpstreamNetworkMonitor.
Bug: 173068192
Test: atest TetheringTests
Change-Id: If2ef9af82bc0cbff9172e575ad3d7686e5b492da
The resource package is used by service-connectivity to load its own
resources.
Bug: 182125649
Test: atest FrameworksNetTests
Merged-In: I3c7fc6285f10318ecef05a64e1179054bb831d99
Merged-In: Ic2491f04880ff66abc3b2d3aaee6168e18f6d68a
Change-Id: I3c7fc6285f10318ecef05a64e1179054bb831d99
