Test that the DHCPv4 lease got renewed after the T1 timer runs out.
Then also simulate the DHCPREQUEST during renew being lost and
retransmitted and the lease eventually getting renewed T1 + 60s later.
The main downside is that this test will inevitably take a while if
running in Qemu without the time travel ability.
Update the test and some utility code to run hostapd in an isolated net
namespace for connection_test.py. We now need a second hostapd
instance though because in static_test.py we test ACD and we need to
produce an IP conflict. Moving the hostapd instance unexpectedly fixes
dhcpd's internal mechanism to avoid IP conflicts and it would no longer
assign 192.168.1.10 to the second client, it'd notice that address was
already in use and assign the next free address, or fail if there was
none. So add a second hostapd instance that runs in the main namespace
together with the statically-configured client, it turns out the test
relies on the kernel being unable to deliver IP traffic to interfaces on
the same system.
With the addition of connect_bssid/roam very few tests actually
require hwsim. Since hwsim can lead to problems with scan results
its best to have it off by default and have each test that needs
it explicitly turn it on.
Tests which previously turned it off have had that option removed.
Tests that do require hwsim still are vulnerable to scan result
problems, so for these tests beacon_int was added to the hostapd
config which seems to help with reliability somewhat.
After the test-runner re-write many tests were left with
stale options that are no longer used at all. These were
periodically getting removed as changes were made to
individual tests, but its apparent now that a tree wide
removal was needed.
Tests netconfig with a static configuration, as well as tests ACD
functionality.
The test has two IWD radios which will eventually use the same IP.
One is configured statically, one will receive the IP via DHCP.
The static client sets its IP first and begins using it. Then the
DHCP client is started. Since ACD in a DHCP client is configured
to use its address indefinitely, the static client *should* give
up its address.
Tests that DHCP using IWD's internal netconfig functions properly.
The actual IP address assignment is not verified, but since IWD does
not signal the connection as successful unless DHCP succeeds we
can assume it was successful by checking that the device is connected.
The process of actually starting dhcpd and configuring the interfaces
is quite simple so it was left in the autotest itself. If (or when)
more tests require IP capabilities (p2p, FILS, etc) this could be
moved into test-runner itself and be made common. The reason I did not
put it in there now is a) because this is the only test and b) more
complex DHCP cases are likely to develop and may require more than this
simplistic setup (like multiple APs/interfaces)
