brcmfmac does not allow the removal of the default / primary interface.
So there isn't much point in having iwd attempt this.
Another issue is that brcmfmac _does_ allow the deletion of non-default
interfaces. So starting iwd on a system with a station & ap interface
active can result in iwd attempting to delete all the interfaces. Given
the above, it succeeds in deleting the ap interface but not the station
one. In strange circumstances it might end up thinking that the ap
interface is the 'default' and trying to use it, whereas it was just
successfully removed.
==192== Conditional jump or move depends on uninitialised value(s)
==192== at 0x4531D3: l_queue_find (queue.c:346)
==192== by 0x42F1F8: manager_config_notify (manager.c:667)
==192== by 0x45A895: process_multicast (genl.c:970)
==192== by 0x45A895: received_data (genl.c:1037)
==192== by 0x4577B2: io_callback (io.c:126)
==192== by 0x456B0D: l_main_iterate (main.c:473)
==192== by 0x456BCB: l_main_run (main.c:520)
==192== by 0x456DDA: l_main_run_with_signal (main.c:642)
==192== by 0x4034B0: main (main.c:497)
The kernel emits NEW_WIPHY events whenever a new wiphy is registered.
Unfortunately these events are emitted under the 'legacy' semantics and
have a hard size limit of 4096 bytes. Unfortunately, it is possible for
a NEW_WIPHY message to exceed this limit (ath10k cards seem to be
affected in particular), which results in the kernel never sending these
messages out. This can lead to NEW_INTERFACE events being emitted with
a wiphy_id that had no corresponding NEW_WIPHY event emitted. Such a
sequence can confuse iwd's hardware detection logic, particularly during
hot-plug or system boot.
Fix this by re-dumping the wiphy if such a condition is detected. This
has some interaction with blacklisted wiphys, so the wiphy objects are
now always tracked and marked as blacklisted. Before, the blacklisted
wiphys were simply not added to the iwd list of tracked wiphys.
For the inner EAP methods that support generation of the key material
include it into imck generation. This allows to cryptographically
bind the inner method with the tunnel.
Windows Server 2008 - Network Policy Server (NPS) generates an invalid
Compound MAC for Cryptobinding TLV when is used within PEAPv0 due to
incorrect parsing of the message containing TLS Client Hello.
Setting L bit and including TLS Message Length field, even for the
packets that do not require fragmentation, corrects the issue. The
redundant TLS Message Length field in unfragmented packets doesn't
seem to affect the other server implementations.
Sometimes, at least with brcmfmac, the default interface apparently
takes a moment to get created after the NEW_WIPHY event. We didn't
really consider this case in the NEW_WIPHY handler and we've got a race
condition. It fixes the following bug for me:
https://bugs.archlinux.org/task/63912 -- tested by removing and
re-modprobing the brcmfmac module rather than rebooting.
To work around this wait for the NEW_INTERFACE event and then retry the
setup. We still do the initial attempt directly after NEW_WIPHY to
handle cases like wiphys with no default interfaces and pre-existing
wiphys.
We track mtime as the 'LastConnectedTime' of the network, and also sort
the known network list according to the last connected time.
Unfortunately we were never reacting to ATTRIB changes, and so were
never updating the network_info->connected_time whenever a network was
connected to.
Rework the logic to address this. This also fixes a small bug where the
connected_time was not set properly prior to removal / re-insertion of
the network_info.
We use the mtime on the network profile as the 'Last Connected Time'.
When we update any property and sync the file to disk, the mtime was not
preserved (since we were creating a new temporary file instead of
modifying the old one). This led to LastConnectedTime property change
being emitted / updated incorrectly when a writable property on the
KnownNetwork interface was updated.
Our design preference is to not call any callbacks in the _free/_destroy
method of a class (with the exception of explicit destroy callbacks
provided, if any).
Invoking the callback in this case was unnecessary: wsc_dbus_free was
already replying to pending connect / cancel messages. The only other
thing the callback would attempt to do is to set station back into
autoconnect mode. This was unnecessary as well since the netdev is
already down.
This change removes the callback invocation. Since wsc_enrollee_destroy
is now just calling wsc_enrollee_free, remove this from the API and
expose wsc_enrollee_free instead.
Split the WSC D-Bus interface class (struct wsc) into a base class
common to station mode and P2P mode (struct wsc_dbus) and station-
specific logic like scanning, saving the credentials as a known network
and triggering the station-mode connection (struct wsc_station_dbus).
Make the base class and its utilities public in wsc.h for P2P use.
Create struct wsc_enrollee which is allocated with wsc_enrollee_new,
taking a done callback as a parameter. The callback is always
called so there's no need for a separate destroy callback. The object
only lives until the done callback happens so wsc_enrollee_cancel/destroy
can only be used before this.
Looks like the rest of the file is simplified thanks to this.
This new API is independent of netdev.c and allows actually
unregistering from receiving notifications of frames, although with some
quirks. The current API only allowed the callback for a registration to
be forgotten but our process and/or the kernel would still be woken up
when matching frames were received because the kernel had no frame
unregister call. In the new API you can supply a group-id paramter when
registering frames. If it is non-zero the frame_watch_group_remove() call
can be used to remove all frame registrations that had a given group-id
by closing the netlink socket on which the notifications would be
received. This means though that it's a slightly costly operation.
The file is named frame-xchg.c because I'm thinking of also adding
utilities for sending frames and waiting for one of a number of replies
and handling the acked/un-acked information.
Instead of taking the credentials from wsc object directly, have the
caller pass these in. This makes it more consistent with how the
done_cb was done.
Split the interface-specific logic from the core WSC logic. The core
WSC code is the part that we can re-use between P2P and station and
doesn't include the D-Bus code, scanning for the target BSS or the
attempt to make a station mode connection.
Allow netdev_create_from_genl callers to draw a random or non-random MAC
and pass it in the parameter instead of a bool to tell us to generating
the MAC locally. In P2P we are generating the MAC some time before
creating the netdev in order to pass it to the peer during negotiation.
Some server implementation don't seem to provide the valid compound MACs.
In the meantime, iwd will ignore the invalid Crypto-Binding TLVs as their
usage is optional.
The intent was to check for the presence of the add_domain_name
operation, not add_dns operation.
Fixes: 930528e35e ("resolve: Add systemd-resolved domain name installer")
It seems that the kernel uses -EOPNOTSUPP if the change_station
operation is not implemented by the driver. However, some drivers do
implement change_station and choose to report -ENOTSUPP instead of
-EOPNOTSUPP.
To add to the confusion, EOPNOTSUPP and -ENOTSUPP are the same on some
systems (e.g. Gentoo). Be paranoid and allow both errors to be ignored
when sending CMD_SET_STATION.
Fixes: 0238ffb8d9 ("netdev: Use -EOPNOTSUPP instead of -ENOTSUPP")
The first if case should be -10950, not 10950. Without the negative
this first case would get hit every time since signal strength values
are always negative.
The Crypto Binding TLV is used to ensure that the EAP peer and the
EAP server participated in both the inner and the outer EAP
authentications of a PEAP authentication by cryptographically associating
the phase 1 and phase 2 authentications.
The usage of Crypto-Binding in PEAPv0 is optional and is triggered by
the reception of the Crypto-Binding TLV from the server.
The handler for EAP Extensions has been modified to support multiple
TLV types instead of the single Result TLV. This will allow to handle
the other TLVs such as Crypto-Binding TLV.
There are some server implementations that send requests that are
not "Password" but still want us send password. This commit modify
the behavior to send a warning and still try to auth with password.
This makes me able to auth with server in my school which sends
"Enter Aruba Login".
wpa_supplicant does not check if it is "Password".
The kernel uses -EOPNOTSUPP in the case of change_station operation not
being provided. On most systems -EOPNOTSUPP is defined to be the same
as -ENOTSUPP, but seemingly not all systems.
Previously, the key was installed once the tunnel was created
despite the outcome of the second authentication phase. Now, the
key installation is delayed until the successful completion of
the second authentication phase. This excludes the unnecessary
operations in the case of a failure and key reinstallation with
cypro-binding in use.
Commit 1057d8aa74 changed the device interface creation logic
from being unconditional inside netdev.c to instead use NETDEV_WATCH_*
events. However, this broke the assumption that the device interface
was created before all others. The effect is that the scan_wdev_add
might no longer be called prior to station interface being created. Fix
this by moving scan_wdev_add/remove calls to netdev.c instead.
Fixes: 1057d8aa74 ("device: Move device creation from netdev.c to event watch")
#0 0x000055555558ee5d in scan_notify (msg=0x55555560b640, user_data=0x0) at src/scan.c:1706
#1 0x00007ffff7f2c78c in ?? () from /usr/lib/libell.so.0
#2 0x00007ffff7f299ec in ?? () from /usr/lib/libell.so.0
#3 0x00007ffff7f28e4a in l_main_iterate () from /usr/lib/libell.so.0
#4 0x00007ffff7f28efc in l_main_run () from /usr/lib/libell.so.0
#5 0x00007ffff7f290b9 in l_main_run_with_signal () from /usr/lib/libell.so.0
#6 0x00005555555639c4 in main (argc=1, argv=0x7fffffffec18) at src/main.c:497
Save the source frame type in struct scan_bss as it may affect how some
of the data in the struct will be parsed. Also replace the P2P IE
payload data in that struct with a union containing pre-parsed p2p
attributes corresponding to the frame type.
This means users don't have to call the parsers in p2putil.c on that
data, which wouldn't have worked anyway because those parsers assume
input is the raw IE sequence rather than just the "payload".
All these functions free up the resources used by the struct but don't
free the struct itself (allowing it to be static) so rename the
functions to avoid confusion.
The kernel sends NL80211_ATTR_SCAN_START_TIME_TSF with CMD_TRIGGER and
RRM requires this value for beacon measurement reports.
The start time is parsed during CMD_TRIGGER and set into the scan request.
A getter was added to obtain this time value for an already triggered
scan.
After making the change, the SCAN_ABORTED case was cleaned up a bit to
remove the local scan_request usage in favor of the one used for all the
other cases.
Create and destroy the device state struct and the DBus interfaces in a
way more similar to the Station, AdHoc and AP interfaces. Drop
netdev_get_device() and the device specific code in netdev that as far
as I can tell wasn't needed.
Check the iftype before registering ANQP on new interface.
Not that the check here and in rrm.c (which already checks the iftype)
may need to be extended to run on NETDEV_WATCH_EVENT_UP because a device
could be created with a different iftype and then have the iftype changed
before powering up.
The RCPI value was using floating point values as per the spec. But instead
we can just use the signal strength coming from the kernel in mili mdm and
scale the hard coded values by a factor of 100.
Beacon requests can specify a scan duration, and set a flag which makes
this duration mandatory. The kernel supports both these values for scan
requests so we no longer need to reject requests which contain these.
Drivers which do not support EXT_FEATURE_SET_SCAN_DWELL will ignore the
duration value, but if duration mandatory is set we must reject the
request.
The kernel allows a scan duration and duration mandatory flag to be
set in scan requests. RRM requests can contain these values so they
have been added to scan_parameters.
Scanning with drivers which do not support EXT_FEATURE_SET_SCAN_DWELL
will not include these values in scan requests.
If a scan is requested during the middle of a connection we should
return busy instead of attempting the scan. The kernel ends up coming
back with not supported in this case, which is misleading and
difficult to debug.
The module framework was changed to call the module exit functions in
the reverse order as the init functions. This uncovered/caused known
networks to try and free the network_info structures after hotspot had
already freed them. Since known networks clean up the network_info's
anyways, we don't actually need hotspot to do any cleanup.
Apparently the intention was for the dependent module's name to appear
in the variable name resulting from using IWD_MODULE_DEPENDS, so the
dependencies all have unique names (apparently not critical).
Despite that PEAPv0 spec indicates that TLS tunnel needs to be torn
down after the transmission of a secure Result response, some servers
treat this TLS close alert as a failure. This patch changes the above
behavior to explicitly torn the tunnel only in the case of
authentication failure and leave it open after the success.
The previous refactoring somehow changed the 'Settings' section name
into 'General'
Fixes: ac53239109 ("doc: Split network configuration description into separate manpage")
This module takes care of radio measurements which an AP can request.
There are many types of requests, and for now only beacon requests
are supported.
IWD will filter certain types of beacon requests that are NOT
supported:
- AP channel reports. Only single channel requests will be supported
- Autonomous measurements. Only direct requests will be supported.
IWD will not accept requets to trigger reports under certain
conditions (SNR/RSSI thresholds, etc.)
- Timed measurements. Only immediate measurements will be performed.
The accuracy for timed measurements cannot be reliably guaranteed
due to kernel scheduling/queues.
- Full reporting detail. The AP can request the STA return the full
set of IEs in a beacon. IWD does not currently save all IEs, plus
there is quite a bit of complexity involved as certain IEs get
truncated, and there are other length limitations.
There are other limitations not specific to beacon requests:
- IWD will support single measurement requests per report. Multiple
measurement request IEs can be included, but the reports will be
sent out separately.
- IWD will limit the number of requests it responds to in a given
amount of time. As it stands now this is hard coded to 2 requests
per second maximum. This will prevent DoS attacks.
- IWD will not accept any measurement requests from APs it is not
connected to, and will not accept any requests until connected.
For Radio Resource Management (RRM) we will need access to the currently
connected BSS as well as the last scan results in order to do certain
kinds of requested measurements.
netdev_connect can achieve the same effect as netdev_connect_wsc but is
more flexible as it allows us to supply additional association IEs. We
will need this capability to make P2P connections. This way we're also
moving the WSC-specific bits to wsc.c from the crowded netdev.c.
On EAP events, call the handshake_event handler with the new event type
HANDSHAKE_EVENT_EAP_NOTIFY isntead of the eapol_event callback.
This allows the handler to be set before calling
netdev_connect/netdev_connect_wsc. It's also in theory more type-safe
because we don't need the cast in netdev_connect_wsc anymore.
Convert the handshake event callback type to use variable argument
list to allow for more flexibility in event-specific arguments
passed to the callbacks.
Note the uint16_t reason code is promoted to an int when using variable
arguments so va_arg(args, int) has to be used.
no_cck_rates is set in the scan parameters generally to make sure
that the Probe Request frames are not sent at any of the 802.11b
rates during active scans. With this patch we also omit those rates
from the Supported Rates IEs, which is required by the p2p spec and
also matches our flag's name.
The current logic did not make sure that each entry provided was
actually parsed. Also add a sanity check to make sure that no duplicate
parsing occurs.
When updating the network ranking there was a potential out of bounds
array access. The condition was if known_network_offset returned a
negative value, indicating the known network was not found. Since
network->info is only set for known networks this should not ever
happen as network->info is checked prior.
Though this is likely impossible, knownnetworks is complex enough that
its better to just be paranoid and put an L_WARN_ON to check the
return.
Since the property Autoconnect was renamed to AutoConnect, change the
Autoconnect setting to match.
For now we still allow the legacy name to be used here, but a warning is
printed to remind users to update.
