The authenticating event was not used anymore and the associating
event use was questionable (after the CMD_CONNECT callback).
No other modules actually utilize these events but they are useful
for autotests. Move these events around to map 1:1 when the kernel
sends the auth/assoc events.
There are a few values which are nice to see in debug logs. Namely
the BSS load and SNR. Both of these values may not be available
either due to the AP or local hardware limiations. Rather than print
dummy values for these refactor the print so append the values only
if they are set in the scan result.
For ranking purposes the utilization was defaulted to a valid (127)
which would not change the rank if that IE was not found in the
scan results. Historically this was printed (debug) as part of the
scan results but that was removed as it was somewhat confusing. i.e.
did the AP _really_ have a utilization of 127? or was the IE not
found?
Since it is useful to see the BSS load if that is advertised add a
flag to the scan_bss struct to indicate if the IE was present which
can be checked.
This issues a GET_SURVEY dump after scan results are available and
populates the survey information within the scan results. Currently
the only value obtained is the noise for a given frequency but the
survey results structure was created if in the future more values
need to be added.
From the noise, the SNR can be calculated. This is then used in the
ranking calculation to help lower BSS ranks that are on high noise
channels.
Parsing the flush flag for external scans was not done correctly
as it was not parsing the ATTR_SCAN_FLAGS but instead the flag
bitmap. Fix this by parsing the flags attribute, then checking if
the bit is set.
Add a nested attribute parser. For the first supported attribute
add NL80211_ATTR_SURVEY_INFO.
This allows parsing of nested attributes in the same convenient
way as nl80211_parse_attrs but allows for support of any level of
nested attributes provided that a handler is added for each.
To prep for adding a _nested() variant of this function refactor
this to act on an l_genl_attr object rather than the message itself.
In addition a handler specific to the attribute being parsed is
now passed in, with the current "handler_for_type" being renamed to
"handler_for_nl80211" that corresponds to root level attributes.
This warning is guaranteed to happen for SAE networks where there are
multiple netdev_authenticate_events. This should just be a check so
we don't register eapol twice, not a warning.
EAP-TTLS Start packets are empty by default, but can still be sent with
the L flag set. When attempting to reassemble a message we should not
fail if the length of the message is 0, and just treat it as any other
unfragmented message with the L flag set.
Its been seen that some vendors incorrectly set the 3rd byte of the
country code which causes the band lookup to fail with the provided
operating class. This isn't compliant with the spec, but its been
seen out in the wild and it causes IWD to behave poorly, specifically
with roaming since it cannot parse neighbor reports. This then
requires IWD to do a full scan on each roam.
Instead of a hard rejection, IWD can instead attempt to determine
the band by ignoring that 3rd byte and only use the alpha2 string.
This makes IWD slightly less strict but at the advantage of not being
crippled when exposed to poor AP configurations.
This was added to support a single buggy AP model that failed to
negotiate the SAE group correctly. This may still be a problem but
since then the [Network].UseDefaultEccGroup option has been added
which accomplishes the same thing.
Remove the special handling for this specific OUI and rely on the
user setting the new option if they have problems.
Experimental AP-mode support for receiving a Confirm frame when in the
COMMITTED state. The AP will reply with a Confirm frame.
Note that when acting as an AP, on reception of a Commit frame, the AP
only replies with a Commit frame. The protocols allows to also already
send the Confirm frame, but older clients may not support simultaneously
receiving a Commit and Confirm frame.
This was overlooked in a prior patch and causes warnings to be
printed when the RSSI is too low to estimate an HE data rate or
due to incompatible local capabilities (e.g. MCS support).
Similar to the other estimations, return -ENETUNREACH if the IE
was valid but incompatible.
If the RSSI is too low or the local capabilities were not
compatible to estimate the rate don't warn but instead treat
this the same as -ENOTSUP and drop down to the next capability
set.
If we register the main EAPOL frame listener as late as the associate
event, it may not observe ptk_1_of_4. This defeats handling for early
messages in eapol_rx_packet, which only sees messages once it has been
registered.
If we move registration to the authenticate event, then the EAPOL
frame listeners should observe all messages, without any possible
races. Note that the messages are not actually processed until
eapol_start() is called, and we haven't moved that call site. All
that's changing here is how early EAPOL messages can be observed.
netdev_disconnect() was unconditionally sending CMD_DISCONNECT which
is not the right behavior when IWD has not associated. This means
that if a connection was started then immediately canceled with
the Disconnect() method the kernel would continue to authenticate.
Instead if IWD has not yet associated it should send a deauth
command which causes the kernel to correctly cleanup its state and
stop trying to authenticate.
Below are logs showing the behavior. Autoconnect is started followed
immediately by a DBus Disconnect call, yet the kernel continues
sending authenticate events.
event: state, old: autoconnect_quick, new: connecting (auto)
src/scan.c:scan_cancel() Trying to cancel scan id 1 for wdev 7d
src/wiphy.c:wiphy_radio_work_done() Work item 1 done
src/wiphy.c:wiphy_radio_work_next() Starting work item 2
src/netdev.c:netdev_mlme_notify() MLME notification New Station(19)
src/station.c:station_dbus_disconnect()
src/station.c:station_reset_connection_state() 85
src/station.c:station_roam_state_clear() 85
event: state, old: connecting (auto), new: disconnecting
src/wiphy.c:wiphy_radio_work_done() Work item 2 done
src/station.c:station_connect_cb() 85, result: 5
src/station.c:station_disconnect_cb() 85, success: 1
event: state, old: disconnecting, new: disconnected
src/netdev.c:netdev_mlme_notify() MLME notification Authenticate(37)
src/netdev.c:netdev_authenticate_event()
Unexpected connection related event -- is another supplicant running?
src/netdev.c:netdev_mlme_notify() MLME notification Authenticate(37)
src/netdev.c:netdev_authenticate_event()
Unexpected connection related event -- is another supplicant running?
src/netdev.c:netdev_mlme_notify() MLME notification Authenticate(37)
src/netdev.c:netdev_authenticate_event()
Unexpected connection related event -- is another supplicant running?
src/netdev.c:netdev_mlme_notify() MLME notification Del Station(20)
src/netdev.c:netdev_mlme_notify() MLME notification Authenticate(37)
src/netdev.c:netdev_authenticate_event()
Unexpected connection related event -- is another supplicant running?
In most cases any failure here is likely just due to the AP not
supporting the feature, whether its HE/VHT/HE. This should result
in the estimation returning -ENOTSUP in which case we move down
the list. Any other non-zero return we will now warn to make it
clear the IEs did exist, but were not properly formatted.
All length check failures were changed to continue instead of
fail. This will now treat invalid lengths as if the IE did not
exist.
In addition HE specifically has an extra validation function which,
if failed, was bailing out of the estimation function entirely.
Instead this is now treated as if there was no HE capabilities and
the logic can move down to VHT, HT, or basic rates.
Caught by static analysis, the dev->conn_peer pointer was being
dereferenced very early on without a NULL check, but further it
was being NULL checked. If there is a possibility of it being NULL
the check should be done much earlier.
Caught by static analysis, if ATTR_MAC was not in the message there
would be a memcpy with uninitialized bytes. In addition there is no
reason to memcpy twice. Instead 'mac' can be a const pointer which
both verifies it exists and removes the need for a second memcpy.
Static analysis complains that 'last' could be NULL which is true.
This really could only happen if every frequency was disabled which
likely is impossible but in any case, check before dereferencing
the pointer.
Since these are all stack variables they are not zero initialized.
If parsing fails there may be invalid pointers within the structures
which can get dereferenced by p2p_clear_*
The input queue pointer was being initialized unconditionally so if
parsing fails the out pointer is still set after the queue is
destroyed. This causes a crash during cleanup.
Instead use a temporary pointer while parsing and only after parsing
has finished do we set the out pointer.
Reported-By: Alex Radocea <alex@supernetworks.org>
static analysis complains that authenticator is used uninitialized.
This isn't strictly true as memory region is reserved for the
authenticator using the contents of the passed in structure. This
region is then overwritten once the authenticator is actually computed
by authenticator_put(). Silence this warning by explicitly setting
authenticator bytes to 0.
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
This shouldn't be possible in theory since the roam_bss_list being
iterated is a subset of entire scan_bss list station/network has
but to be safe, and catch any issues due to future changes warn on
this condition.
