Test that the AP interface and the station interface managed by iwd
can actually send and receive ethernet traffic when iwd is in the
connected state. Due to linux routing none of the high level utilities
like ping or arping can be easily used to test communication between
two interfaces of the same machine so use a method based on the
mac80211_hwsim/tools/hwsim_test.c utility in the wpa_supplicant tree
that uses a raw socket to inject unicast and broadcast frames.
Add this check in three tests of different security type connections
that simulate a single AP, and the two roaming tests with two APs.
Check that the station can't communicate with the other AP's interface.
Sometimes iwd will take a while to register its dbus name. The python
class already waits for the name to appear on dbus if iwd is being
launched from python, do this also if iwd was already launched by the
test-runner. My use case was when running iwd under valgrind in which
case it runs slower.
Modify AsyncOpAbstract._wait_for_async_op and
IWD.wait_for_object_condition to call context.iteration() in the
blocking mode instead of calling context.pending() every 0.01s. This
gets rid of busy-waiting and also ensures that the condition is checked
after every single dbus (or other) event. This way a condition that
potentially occurs for less than 0.01s can be reliably waited for.
Make the HostapdCLI class non-static so that each objects corresponds
to a hostapd instance on one network interface (this is independent of
whether the AP instances use one or separate hostapd processes)
