The host systems configuration directories for IWD/EAD were
being mounted in the virtual machine. This required that the
host create these directories before hand. Instead we can
just set up the system and IWD/EAD to use directories in /tmp
that we create when we start the VM. This avoids the need for
any host configuration.
Allow the "hwsim_medium=no" setting in hw.conf's SETUP section to
disable starting hwsim. It looks like the packets going through
userspace add enough latency that active scans don't work, probe
responses don't arrive within the "dwell time" or probe requests are not
ACKed on time. I've tried modifying tools/hwsim.c to respond with the
HWSIM_CMD_TX_INFO_FRAME cmd as the first thing after receiving a
HWSIM_CMD_FRAME and even skipping the queue in ell/genl.c by writing the
command synchronously, but neither helped enough to make the scans work.
This does not rule out that hwsim or the way our scans are done can be
fixed and that would obviously be better than what I did in this patch.
This extends test-runner to also use iwmon if --log is enabled.
For this case the iwmon log will be found inside each test
log directory.
A new option, --monitor <file> was added in case full logging isn't
desired (potentially for timing issues) but a iwmon log is needed.
Be aware that when --monitor is used test-runner will mount the
entire parent directory. test-runner itself will only write to the
file specified, but just know that the parent directory is available
as read-write inside the VM.
--log takes precedence over --monitor, meaning the iwmon log will
be written to <logdir>/<test>/iwmon instead of the file specified
with --monitor if both options are provided.
The virtual environment changed slightly adding two network adatpers
which are connected to the same backend so they can communicate with
each other (basically connected to a switch). The hostapd command
line was modified to allow no interfaces to be passed in which lets
us create zero radios but still specify a radius_config file.
This is just a more concise/pythonic way of doing function arguments.
Since Process/start_process have basically the same argument names
we can simplify and use **kwargs which will pass the named arguments
directly to Process(). This also allows us to add arguments to Process
without touching start_process if we need.
Slower systems may not be able to make some timeouts that tests
mandated. All timeouts were increased significantly to allow tests
to pass on slow systems.
Removed test-runner.c, and renamed py_runner to test-runner. Removed
tools/test-runner from .gitignore.
This was done as a separate commit to avoid a nasty diff between the
existing test runner, and the new python version
This patch completely re-writes test-runner in Python. This was done
because the existing C test-runner had some clunky work arounds and
maintaining or adding new features was starting to become a huge pain.
There were a few aspects of test-runner which continually had to
be dealt with when adding any new functionality:
* Argument parsing: Adding new arguments to test-runner wasn't so
bad, but if you wanted those arguments passed into the VM it
became a huge pain. Arguments needed to be parsed, then re-formatted
into the qemu command line, then re-parsed in a special order
(backwards) once in the VM. The burden for adding new arguments was
quite high so it was avoided (at least by me) at all costs.
* The separation between C and Python: The tests are all written in
python, but the executables, radios, and interfaces were all created
from C. The way we solved this was by encoding the require info as
environment variables, then parsing those from Python. It worked,
but it was, again, a huge pain.
* Process management: It started with all processes being launched
from C, but eventually tests required the ability to start IWD, or
kill hostapd ungracefully in order to test certain functionality.
Since the processes were tracked in C, Python had no way of
signalling that it killed a process and when it started one C had
no idea. This was mitigated (basically by killall), but it was
no where close to an elegant solution.
Re-writing test-runner in python solves all these problems and will
be much easier to maintain.
* Argument parsing: Now all arguments are forwarded automatically
to the VM. The ArgParse library takes care of parsing and each
argument is stored in a dictionary.
* Separation between C and Python: No more C, so no more separation.
* Process management: Python will now manage all processes. This
allows a test to kill, restart, or start a new process and not
have to remember the PID or to kill it after the test.
There are a few more important aspects of the python implementation
that should now be considered when writing new tests:
* The IWD constructor now has different default arugments. IWD
will always be started unless specified and the configuration
directory will always be /tmp
* Any non *.py file in the test directory will be copied to /tmp.
This avoids the need for 'tmpfs_extra_stuff' completely.
* ctrl_interface will automatically be appended to every hostapd
config. There is no need to include this in a config file from
now on.
* Test cleanup is extremely important. All tests get run in the
same interpreter now and the tests themselves are actually loaded
as python modules. This means e.g. if you somehow kept a reference
to IWD() any subsequent tests would not start since IWD is still
running.
* For debugging, the test context can be printed which shows running
processes, radios, and interfaces.
Three non-native python modules were used: PrettyTable, colored, and
pyroute2
$ pip3 install prettytable
$ pip3 install termcolor
$ pip3 install pyroute2
Besides being undefined behaviour, signed integer overflow can cause
unexpected comparison results. In the case of network_rank_compare(),
a connected network with rank INT_MAX would cause newly inserted
networks with negative rank to be inserted earlier in the ordered
network list. This is reflected in the GetOrderedMethods() DBus method
as can be seen in the following iwctl output:
[iwd]# station wlan0 get-networks
Network name Security Signal
----------------------------------------------------
BEOLAN 8021x **** }
BeoBlue psk *** } all unknown,
UI_Test_Network psk *** } hence assigned
deneb_2G psk *** } negative rank
BEOGUEST open **** }
> titan psk ****
Linksys05274_5GHz_dmt psk ****
Lyngby-4G-4 5GHz psk ****
If an application has a bug and hangs on SIGTERM this causes
test-runner to hang as well. This is obviously an issue with
the application in question, but test-runner should have a way
of continuing onto the next test rather than hanging.
Instead we can use WNOHANG and a sleep to allow applications
some amount of time to exit, and if they haven't use SIGKILL
instead as well as print an error. Similar to how
wait_for_socket works. The timeout is hard coded to 2 seconds
(100ms sleep + 20 iterations).
Previously iwmon was running per-test, which would jumble any subtests
together into the same log file making it hard to parse. Now create
a separate directory for each subtest and put the monitor log and
pcap there.
Using mac80211_hwsim can sometimes result in out of order messages
coming from the kernel. Since mac80211_hwsim immediately sends out
frames and the kernel keeps command responses in a separate queue,
bad scheduling can result in these messages being out of order.
In some cases we receive Auth/Assoc frames before the response to
our original CMD_CONNECT. This causes autotests to fail randomly,
some more often than others.
To fix this we can introduce a small delay into hwsim. Just a 1ms
delay makes the random failures disappear in the tests. This delay
is also makes hwsim more realistic since actual hardware will always
introduce some kind of delay when sending or receiving frames.
When running test-runner as non-root the environment variables
SUDO_GID/SUDO_UID were unset, causing atoi to segfault. This replaces
atoi with strtol, and checks the existance of SUDO_GID/SUDO_UID
before trying to turn it into an integer. This patch also allows
the uid/gid to be read from the user if running as non-root.
Note: running as non-root does require the users permissions to be
setup properly. Directories and files are created when running with
logging, so if the user running test-runner does not have these
permissions the creation of these files will fail.
The configuration value of iwd_config_dir was defaulting to /etc/iwd
which, in the context of test-runner, is probably not the best idea.
The system may have a main.conf file in /etc/iwd which could cause
tests to fail or behave unexpectedly.
In addition all tests which use iwd_config_dir set it to /tmp anyways.
Because of this, the new default value will be /tmp and no tests will
even need to bother setting this.
The configuration value itself is not being removed because it may be
useful to set arbitrary paths (e.g. /etc/iwd) for example when using
the shell functionality.
This key is special in hostapd, and was being treated as a normal hostapd
config file. This special radius config file needs to be kept unpaired from
any interfaces so now its passed in as a separate argument and appended to
the end of the hostapd execute command.
Tests which use a standalone RADIUS server may crash due to
the wiphy array not taking into account the 'radius_server'
key which is skipped during setup.
The goto was jumping to a label which freed the wiphy list which
had not yet been initialized. This also fixes another similar issue
if chdir fails (in this case tmpfs_extra_stuff would get freed
before being allocated).
Some test cases require (at least with recent hostapd versions) a
stand alone radius server. This is done using driver=none in the
hostapd config file. For this use case hostapd does not need any
radio since its not doing anything wireless related.
Now inside the hw.conf file, under the HOSTAPD group, you can
specify a config file as the value to 'radius_server' key. This
config file will be used without any associated radio when hostapd
is started.
These two processes are executed per-test so they can be passed the
test name and have the logs stored only in tests that actually need
them rather than at the top level.
After changing the valgrind log to --log-fd, it appears that
the log file just gets appended, where before it was overwritten.
This makes test print out all previous tests valgrind results.
Now after printing out the valgrind info we can erase the file
for the next test.
This was a mistake in the original implementation. Since test-runner
is always run from the tools directory using --log with no directory
specified would result in many log files being put into the iwd tree.
Instead we can make --log take a required argument so its more
obvious where all the logs are going to go.
localtime indexes month starting at zero so adding 1 gives us a folder
name with the correct month.
The year is also set as 'years since 1900', so we need to add 1900 to
the year to get the actual year.
Historically if you wanted to see output from a python test you needed
to specify -v pytests. This was also the case if IWD was started from
python.
Nearly every time I run test-runner I would specify "-v iwd,pytests"
only to get the IWD output on these specific tests.
Instead we can special case 'python3' (previously 'pytests') inside
execute_program so that turning on verbosity for 'iwd' also turns it
on for the python tests.
After the logging changes verbose IWD with valgrind did not show any IWD
output. This commit fixes this by checking the verbosity against log_name
rather than argv[0] since log_name has a special case for valgrind/iwd.
The valgrind logic in start_iwd was refactored to only use the --log-fd
option rather than using --log-file in addition to --log-fd.
All the processes verbose output is just written to stdout, and very
hard to parse after the test runs. Having test-runner write the
processes output to separate log files is much nicer to view after
the test runs.
A read/write file system is created which is separate and isolated
from the current FS mount (which mounts the whole host file system).
Doing this requires the user to create a folder somewhere to be used
as the mount point. This folder is where all the log files will end
up after test-runner runs.
Since test-runner must be run as root, care was taken to keep the
log files owned by the user which runs test-runner. The UID/GID
are passed to the VM, and any log files created are chown'ed back
to the user who ran test-runner.
execute_program was refactored, and both verbose and log arguments
were removed. The verbose argument was not really required since
we can do check_verbosity(argv[0]) internally. The 'log' flag was
only used along with --shell, and now the user can simply use
--log instead of dumping /tmp/iwd.log.
You can use this feature by specifying --log[=path] to test-runner.
If no path is provided the current directory will be used. Using
the --log flag will result in all processes being run with the
--verbose flag.
A new folder will be created under the --log path. The folder will
be of the name "run-<year>-<month>-<dat>-<PID>". Under this folder
you will find any global process logs. These are processes that
are only run once for ALL tests (hwsim, ifconfig, dbus etc.). There
will also be folders for specific tests that were run. Inside these
test folders will be logs of processes that are run per-test (iwd,
hostapd, python etc.).
Coverity reported this as a leak, but the test queue is actually
getting freed later and does not need to be freed locally in add_path
This basically reverts c0863e5bc6
The -U parameter only allowed for a list of unit tests to be run.
Most of the time for sanity checking you want to run all the unit
tests so this has been changed to take an optional argument.
Now, the -U flag (by itself) will run all unit tests. Running a
single or list of unit tests can still be achieved by:
--unit-tests=test-eapol,test-crypto
This makes every full test run consistent. The test list was being
stored as a hashmap, which has no been changed to a queue so we can
insert each test sorted.
Specifically, this defines the behavior when --shell is used when no
specific test is specified. In this case test-runner will assume the
'shell' test/sandbox should be used as the test environment as
running all autotests with --shell is not useful or feasable.
This option allows the script to be called with a raw XML file. This
is mostly useful for testing, but since its already implemented we
might as well include it.
Some hotspot networks do not contain SSID_STR, which was required
for both naming the provisioning file as well as the 'Name' key.
The DisplayedOperatorName is a better option for this 'Name' key
and could also be used for the filename.
Now, DisplayedOperatorName is preferred, and if not found SSID_STR
is used.
This will allow the user to see the iwd output in /tmp/iwd.log.
execute_program was extended to take a 'log' flag. If true, this
will cause the programs output to be stored in /tmp/<name>.log.
This is only useful when using the --shell command as this file
will go away once the VM stops. The verbose flag always overrides
the logging functionality.
For now only iwd output is logged when using --shell.
It is sometimes valuable to just boot into a shell in order to manually
test functionality. Since test-runner already is setup to run a minimal
kernel with all the necessary requirements for hostapd/iwd it made
sense to allow the user to do this.
If -s,--shell is passed into test runner, no python tests will be run.
The hw.conf file is still used to setup IWD and hostapd so once booted
into the shell you can still (manually) run the test (e.g. via iwctl).
This also works when using USB/PCI passthrough. This makes testing
out different kernel version with real hardware much quicker than
using the host kernel.
This tool will convert an iOS 'mobileconfig' file into the IWD
format. The tool only supports PEAP and TTLS networks, including
hotspots.
It will also parse out any certificate chains found in the
mobileconfig file, and verify they lead to a root CA found on the
system. If they do, this root CA will be used as the CACert in
the provisioning file.
Two new hardware configuration keys were added:
[radX]
iftype_disable=station,ap,adhoc,p2p_client,p2p_go,mesh_point
cipher_disable=wep40,wep104,tkip,ccmp,bip
Any of the above values are supported and can be disabled.
Support is coming to configure radios with a specific set of interface
type and cipher support, so the input to create_hwsim_radio is better
suited to use a parameter structure rather than adding more parameters.
The radio_confs key was parsed in a way that required all radios
to be specified in the list. This isnt optimal, as you may want to
specially configure a certain radio, while keeping all the others
default.
This change reworks some logic and allows any radio to be specially
configured on its own.
mac80211_hwsim now allows setting supported iftypes/ciphers. This patch
enables this support in hwsim. Specific iftypes/ciphers can now be
disabled via the command line when creating a radio:
Disable iftypes:
--iftype-disable station,ap,adhoc,p2p_client,p2p_go,mesh_point
Disable cipher types:
--cipher-disable ccmp,tkip,wep
The test should be aborted if there are not enough radios that support
AP mode. The iftype attribute will now be parsed during the wiphy dump
and a flag is set on the wiphy so we know to skip this radio when
creating the hostapd instances. Since hostapd gets started first, it
will automatically choose all the radios it needs which support AP mode.
This leaves the remainder of the radios (potentially STA only) for IWD.
In the PCI/USB passthrough changes the wiphy ID was changed to be an
unsigned integer, where id zero corresponded to an error when in native
hardware mode. Along with this, the radio ID for hwsim was changed to a
pre-increment (only in test-runner), so the radio IDs would start at 1.
The repercussions were not fully investigated, but if they were it would
have been seen that hwsim creates radios IDs starting at zero. This left
test-runner and hwsim with unsynchronized radio IDs, and radio zero
never got deleted after each test causing each successive test to
discover old radio IDs.
-nodefconfig doesn't exist anymore and according to the docs it either
had the same meaning or was implied by -no-user-config so it wouldn't be
needed anyway. -balloon doesn't exist anymore and according to
https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg06985.html
"-balloon none" was a nop, but I suspect -nodefaults may have already
had the effect of disabling creation of the virtio-balloon device.
This patch allows the host machine to pass through its PCI/USB network
cards into the test-runner virtual machine. By doing this we can run
nearly all the same autotests using physical/real wireless hardware.
First off, utilizing this feature requires a properly configured host
machine. There are kernel boot parameters and config files that need to
be configured before any of this will work. Unfortunately there is no
way around this, and hence this feature is not particularly aimed for
"the masses", but rather for specially configured test machines.
A new configuration file was introduced (tools/hw.conf) which is just an
example, it should be edited to work with the host machine using it. This
file merely holds the PCI addresses/USB bus of the devices you wish to pass
through to qemu.
Passing in this hardware config file with --hw <file> tells test-runner
that you are attempting to use this new feature. The tests themselves
do not need to change, its the initial test setup that required some
changes.
Since we are no longer creating radios we must discover the radios that
are present (once in the VM). This is done using borrowed code from IWD
to dump wiphys and interfaces. As the wiphys/interfaces are dumped, we
build up the wiphy list. In the hwsim case we still build this list up
when we create the radios, which hasn't changed. This does lead us to
have some special cleaup, where in the native case we just 'reset' the
list into its state pre-test (removing any hostapd flags). And as before
with the hwsim case we fully destroy and free the wiphy list, since a
new list will be created on the next test (along with new radios).
There should not need to be any changes to the tests themselves, but
potentially to some hw.conf files. A new key was introduced, 'needs_hwsim'
which need to be set on any tests that require the hwsim dbus API. This
tells test-runner to skip this test, otherwise it would fail in native
mode.
One last minor detail; the wiphy->id was changed to an unsigned int. This
is to match the type the kernel uses when dumping wiphys. Because of
this '0' is now the error case for both hwsim and native mode rather than
-1. Error checks were updated accordingly.
Move the interface creation code from configure_hw_radios to
configure_hostapd_instaces so as not to create unneeded interfaces on
the wiphys that IWD is going to manage. We pass a wiphy whitelist to
IWD later and IWD now creates the interfaces it needs on those managed
wiphys. Change TEST_WIPHY_LIST format to only include the interface
name for the wiphys used by hostapd.
Note that we still remove interfaces just before removing the hwsim
radios on exit, it seems like there's no point removing the interfaces
in that case.
Drop a pointless asignment of has_hw_conf to false when it's already
false, fix index when accessing radio_conf_list. Apparently the SETUP
group is not used in any of our test and wasn't tested itself so could
as well have removed the code.
The option may be present but may not parse correctly as a list in which
case has_hw_conf will be true but radio_conf_list will be NULL and we
might crash.
HT/VHT require setting the regulatory domain to something other
than 00. This adds an option to the hardware config which allows
the regulatory domain to be set to any country.
HT/VHT require channels who's use is restricted depending on
country. When using these channels, cfg80211 tries to load the
regulatory.db file in /lib/firmware and verify the signature.
This poses a problem as the host machine may not have a signed
regulatory.db, or it may have not been signed with the expected
signature which would cause cfg80211 to fail to load the database.
If cfg80211 fails to load the database the country will be set to
00, which is the most restrictive "world roaming" setting. This
does not allow HT/VHT to work properly.
In the context of test-runner we can simply disable the verification.
Unforunately this is not a very common practice, so CONFIG_EXPERT
must be enabled.
If your system does not have /lib/firmware/regulatory.db you must
get it. More info can be found here:
https://wireless.wiki.kernel.org/en/developers/regulatory/wireless-regdb
When using --valgrind, you must also use --verbose iwd, and, depending
on the tests you may also need to include pytests in the verbose flag.
Since anyone using --valgrind definitely wants to see valgrind info
printed they should not need to enable verbose printing. Also, manually
parsing valgrind prints with IWD prints mixed throughout is a nightmare
even for a single test.
This patch uses valgrind's --log-file flag, which is directed to
/tmp/valgrind.log. After the tests runs we can print out this file.
If ofono/phonesim is not found on the system, any test requiring those will
be skipped. In this case we would still try and remove symlinks that were
never created. An error would be printed, but the actual source tree files
were getting removed. This adds a new goto label where we can skip the tmpfs
removal in this error case.
-v dbus may help debug find client authentication problems but if
everything is ok it will not print any messages. -v dbus-monitor starts
the dbus-monitor.
