BSS table is not updated when a non-P2P station runs a scan without P2P
IE in Probe Response frame, since that would remove P2P IE information.
However, this results also in not updating mandatory rates in Supported
Rates and BSS Membership Selectors element even though AP/GO changes
frequency from 2.4 GHz to 5 GHz band.
This is causing connection failure since BSS table has 1 Mbps as
mandatory rate for AP connection but minimum supported rate in 5 GHz
band is 6 Mbps.
To avoid connection failures in such cases, don't skip updating BSS
table when the BSS frequency is changed. This covers the most important
case addressed in commit ff57398fca ("P2P: Do not drop P2P IEs from
BSS table on non-P2P scans") while still allowing other changes to be
taken into account if the GO were to actually change channels (or band,
which would be the most likely case needing the update).
Signed-off-by: Ainy Kumari <quic_ainykuma@quicinc.com>
The max transmit power of Standard Power (SP) Access Points (AP) on
6 GHz band and APs on 2.4 GHz and 5 GHz bands is limited by effective
isotropic radiated power (EIRP), while the max transmit power of Low
Power Indoor (LPI) APs on 6 GHz Band is limited by power spectral
density (PSD). Therefore the max transmit power of LPI APs grows as the
channel width increases, similar to the noise power which has constant
PSD.
Adjust the SNR of BSSes based on the transmit power config and max
channel width. EIRP limited APs usually have constant max transmit power
on different channel widths, their SNR decreases on larger channel width
because the noise power is higher, while PSD limited APs have constant
SNR over all channel widths.
Signed-off-by: Kaidong Wang <kaidong@chromium.org>
Beacon frames are allowed to optionally include one more more Reduced
Neighbor Report elements. Only the first one was parsed previously.
Extend this to use a loop to go through all included RNR elements.
Signed-off-by: Ben Greear <greearb@candelatech.com>
gcc 12.1 complains about using pointer after realloc as it could
potentially be moved/freed, causing any uses after UB.
Fix this by doing checks before realloc and use those statuses and
update with new BSS.
Signed-off-by: Krishna T <krishna.t@nordicsemi.no>
Parse the reconfiguration Multi-Link element and:
- Don't select a BSS for connection if it is part of an MLD
and is going to be removed.
- Don't scan for missing links that are to be removed.
- Don't include removed links in association.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Add support for building and sending ML probe requests. During connect,
try to send an ML probe request if we are going to connect to an MLD AP
and the BSS information for some of the links is missing.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Allow clients to specify the BSSID of an auto GO. If the auto GO has been
discovered on another interface, optimize scan frequency by performing
a single channel scan first. Android and ChromeOS use this to streamline
auto GO discovery.
Signed-off-by: Matthew Wang <matthewmwang@chromium.org>
While checking for stale BSSes, the current time is used as a basis and
then based on age the stale check time is calculated, but if this is
done too early in the boot and if either BOOTTIME/MONOTONIC (the one
Zephyr uses by default) are used then the stale check time underflows
and goes to future causing active BSS entries in the scan to be treated
as stale and flushed.
Fix this by adding a check before calculating stale time and ignore this
check till the system reaches the BSS expiration time (this would never
happen with REALTIME clock).
Signed-off-by: Krishna T <krishna.t@nordicsemi.no>
Signed-off-by: Sridhar Nuvusetty <sridhar.nuvusetty@nordicsemi.no>
In case both the local driver and the AP support MLD, request an MLD
authentication from the driver. When processing the authentication event
from the driver verify that the MLD address in the authentication data
matches that of the requested AP.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
Connection attempt could have been intermittently drop when reconnecting
to the same ESS due the current BSS entry getting removed immediately
after the disconnection for the purpose of reconnecting to the same ESS.
Avoid this by not removing a BSS entry for the same ESS when in this
special state of trying to reconnect to the same ESS.
Signed-off-by : WooYong Kim <wykim@newratek.com>
Parse Multi-Link element received in scan result to get AP MLD address
and cache it in the wpa_bss structure.
Signed-off-by: Shivani Baranwal <quic_shivbara@quicinc.com>
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Add support to fetch MLO connection info from the driver to the
wpa_supplicant instance of corresponding MLD STA interface. In addition,
return true for BSSs associated with MLO links from wpa_bss_in_use() to
avoid getting them cleared from scan results.
Co-authored-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Signed-off-by: Shivani Baranwal <quic_shivbara@quicinc.com>
It can be helpful to know whether the information elements from the
Beacon frame or the Probe Response frame are newer when using BSS table
entries, so make this information known, if available. This allows the
Beacon frame elements to be preferred over the Probe Response frame
elements when desired.
Signed-off-by: Jouni Malinen <j@w1.fi>
wpa_supplicant does not send a D-Bus notification of the BSS frequency
change when a CSA happens. Sending a PropertyChanged signal with the
updated frequency will notify the network manager quickly, instead of
waiting for the next scan results.
Signed-off-by: Arowa Suliman <arowa@chromium.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Replace the previously used design "(u8 *) (bss + 1)" with a variable
length array at the end of struct wpa_bss bss->ies[] in hopes of making
this easier to understand for static analyzers.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This makes it easier to change the internal struct wpa_bss design for
storing the variable length IE buffers.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This removes need from the callers to know the struct wpa_bss details
for the location of the memory area for storing the IEs.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Use the common IE parsing routine in hope of trying to make the length
checks easier for static analyzers. In addition, try to make the
*_vendor_ie_multi() cases easier to analyze as well even though they
cannot use for_each_element_id().
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Use the common IE parsing routine in hope of trying to make the length
checks easier for static analyzers.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
Consider the BSS entry that is pending for the P2P group join operation
also as a known network along with the existing configured networks.
This prevents removal of the BSS entry that is still in the process of
P2P join operation from the BSS table when the number of entries exceed
bss_max_count.
Signed-off-by: Sreeramya Soratkal <ssramya@codeaurora.org>
This avoids a theoretical unsigned integer overflow case with 32-bit
integers, but something that could potentially be hit with 16-bit int
(though, even that part looks pretty theoretical in this particular case
of number of BSSs in scan results).
Signed-off-by: Jouni Malinen <j@w1.fi>
If an AP (P2P GO) has changed its operating channel or SSID recently,
the BSS table may have multiple entries for the same BSSID.
Commit 702621e6dd ('WPS: Use latest updated BSS entry if multiple
BSSID matches found') fetches latest updated BSS entry based on
BSSID. Do the same when fetching an entry based on the P2P Device
Address.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
The new ieee802_11_ext_capab() and wpa_bss_ext_capab() functions can be
used to check whether a specific extended capability bit is set instead
of having to implement bit parsing separately for each need.
Signed-off-by: Jouni Malinen <j@w1.fi>
Extend wpa_supplicant to use a separate OSU_NAI information from OSU
Providers NAI List ANQP-element instead of the OSU_NAI information from
OSU Providers list ANQP-element when connecting to the shared BSS
(Single SSID) for OSU.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This extends wpa_supplicant Hotspot 2.0 ANQP routines to allow the
Operator Icon Metadata ANQP-element to be fetched with "ANQP_GET <bssid>
hs20:12". The result is available in the new hs20_operator_icon_metadata
entry in the "BSS <bssid>" output.
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This allows PMKSA cache entries for FILS-enabled BSSs to be shared
within an ESS when the BSSs advertise the same FILS Cache Identifier
value.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
The requested behavior can be approximated for most use cases even if
the driver does not support reporting exact TSF values for frames.
Enable this capability for all drivers to make beacon report processing
more useful for a common use case.
Signed-off-by: Jouni Malinen <j@w1.fi>
The way the removal of duplicated (one per frequency) BSS entries in the
cfg80211 scan results were removed in driver_nl80211_scan.c
bss_info_handler() depended on having the full scan results available to
allow iteration through the other entries. This is problematic for the
goal of being able to optimize memory allocations for scan result
fetching in a manner that would not build the full result buffer in
memory.
Move this duplicate removal into bss.c since it has sufficient
information available for doing the same determination of which one of
two BSS entries is more current.
Signed-off-by: Jouni Malinen <j@w1.fi>
In some cases, after a sudden AP disappearing and reconnection to
another AP in the same ESS, if another scan occurs, wpa_supplicant might
try to roam to the old AP (if it was better ranked than the new one)
because it is still saved in BSS list and the blacklist entry was
cleared in previous reconnect. This attempt is going to fail if the AP
is not present anymore and it'll cause long disconnections.
Remove an AP that is probably out of range from the BSS list to avoid
such disconnections. In particular mac80211-based drivers use the
WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY reason code in locally generated
disconnection events for cases where the AP does not reply anymore.
Signed-off-by: David Spinadel <david.spinadel@intel.com>
Fix possible memory leak in case if WPS is not enabled on the interface
for connection. This path was missed in commit
fae7b37260 ('WPS: Do not expire probable
BSSes for WPS connection').
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
When the BSS count reaches max_bss_count, the oldest BSS will be removed
in order to accommodate a new BSS. Exclude WPS enabled BSSes when going
through a WPS connection so that a possible WPS candidate will not be
lost.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Add a helper function to find a certain IE inside IEs buffer by ID and
use this function in several places that implemented similar
functionality locally.
Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Reorder terms in a way that no invalid pointers are generated with
pos+len operations. end-pos is always defined (with a valid pos pointer)
while pos+len could end up pointing beyond the end pointer which would
be undefined behavior.
Signed-off-by: Jouni Malinen <j@w1.fi>
Do not expire scan results entries based on scan results from a scan
that was aborted. The aborted scan did not scan all the requested
channels or SSIDs, so the fact that a BSS is missing from the scan
results does not mean it is not available.
Signed-off-by: Avraham Stern <avraham.stern@intel.com>
This allows wpa_supplicant to expose internally unknown ANQP-elements in
the BSS command. For example, "ANQP_GET <BSSID> 265" can be used to
fetch the AP Geospatial Location ANQP-element and if the AP has this
information, the "BSS <BSSID>" command will include the response as
"anqp[265]=<hexdump>".
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This allows a BSS entry to be expired if the AP has changed its SSID
while maintaining the same BSSID and we are associated with the BSS.
Previously, the same BSSID was enough to mark all BSS entries from the
BSSID as in use regardless of the SSID and as such, they could remain in
the wpa_supplicant BSS table indefinitely as long as the association
remaining.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Previously, one timeout per process (by default every 30 seconds) was
used P2P peer expiration and another per-interface timeout (every 10
seconds) was used to expire BSS entries. Merge these to a single
per-process timeout that triggers every 10 seconds to minimize number of
process wakeups due to periodic operations.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
These values were previously used only for sorting the scan results, but
it may be useful to provide access to the used values through the BSS
entries.
Signed-off-by: Jouni Malinen <j@w1.fi>
In addition, add support for returning the capability list through
the BSS control interface command.
Signed-off-by: ASHUTOSH NARAYAN <ashutoshx.narayan@intel.com>
In addition, add support for returning the capability list through the
BSS control interface command.
Signed-off-by: ASHUTOSH NARAYAN <ashutoshx.narayan@intel.com>
wpa_bss_in_use() used to determine that a BSS with BSSID of
00:00:00:00:00:00 is in use in almost every case since either
wpa_s->bssid or wpa_s->pending_bssid was likely to be cleared. This
could result in a corner case of a BSS entry remaining in the BSS table
indefinitely if one was added there with a (likely bogus) address of
00:00:00:00:00:00. Fix this by ignore wpa_s->bssid and
wpa_s->pending_bssid if the BSSID in the BSS table entry is
00:00:00:00:00:00.
In theory, that address is a valid BSSID, but it is unlikely to be used
in any production AP, so the potential expiration of a BSS entry with
that address during a connection attempt would not be a concern
(especially when a new scan would be enough to recover from that).
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
It is possible for scan result processing or BSS entry removal to occur
while there is a pending connect or sme-connect radio work with a
previously selected BSS entry. The BSS pointer was previously verified
to be valid, i.e., still point to a BSS entry, at the time the actual
connection operation is started. However, that BSS entry could have
changed to point to another BSS if the old BSS entry was either removed
or reallocated and a new BSS entry was added at the same location in
memory. This could result in the connection attempt failing to configure
parameters properly due to different BSS information (e.g., different
BSSID).
Fix this by updated the pending connect radio work data on BSS entry
updates similarly to how the last_scan_res array was updated. If the
selected BSS entry is removed, this will still result in a failed
connection, but reallocated BSS entry is now followed properly and used
when the connection work starts.
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
