Some APs do not advertise operating classes correctly for BSS Transition
Management. Try to determine the most likely operating frequency based
on the channel number (1..14 --> 2.4 GHz; 36..177 --> 5 GHz) if invalid
op_class == 255 is received in a BSS Transition Management Request. This
speeds up the following operating by avoiding a full scan due to an
unknown channel.
This extends the workaround that was added in commit 80ce804e88 ("WNM:
Workaround for broken AP operating class behavior") for invalid
operating class 0 to cover another observed case with invalid operating
class 255.
Signed-off-by: Yu Zhang(Yuriy) <quic_yuzha@quicinc.com>
Currently MLO CSA test case supports CSA only on the first link.
However, now it can be extended to other links as well.
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
During channel switch handling for AP MLD, if link ID is incorrect,
there is no point in proceeding till end and failing or returning from
there. Hence sanitize it in the initial time itself and return if it is
incorrect. Throw a warning print if it is not correct as well.
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Channel switch operation fails if 'eht' option is given without 'he'
as hostapd_config_check() returns following error:
"Cannot set ieee80211be without ieee80211ax"
The issue is seen only when switching within/to DFS channels because
hostapd_switch_channel_fallback() does not set 'ieee80211ax' in
hostapd configuration unless 'he_enabled' is set for the new channel.
Set 'he_enabled' in struct hostapd_freq_params for channel switch
when EHT is enabled.
Signed-off-by: Aloka Dixit <quic_alokad@quicinc.com>
Now that per STA profile is cached already, there is no need to form it
dynamically on every Probe Request frame.
Use the cached one instead.
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
As per IEEE P802.11be/D7.0, 35.3.3.5.1 (Inheritance in the Per-STA
Profile subelement of Basic Multi-Link element), Note 1, if there exists
one or more Vendor Specific elements carried in a Management frame that
includes the Basic Multi-Link element containing a per-STA profile for a
reported STA, and the contents of the Information field for at least one
of the Vendor Specific elements is not the same as that of at least one
Vendor Specific element that applies to the reported STA, then each
Vendor Specific element that applies to the reported STA is included in
its Per-STA Profile subelement.
Handle this.
Signed-off-by: Arunpandi Kannan <quic_arunpand@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
There can be an element in the reporting BSS which is not there in the
reported BSS. This element should not be inherited in the per STA
profile. Hence to indicate this, the corresponding per STA profile
should include a Non-Inheritance element in the per STA profile.
Include Non-Inheritance element in the per STA profiles when needed.
Signed-off-by: Sriram R <quic_srirrama@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
If an element is present in the reporting BSS and it is also present in
the reported BSS and the contents are same, ideally, the reported BSS
need not carry such element in its per STA profile. Such elements are
assumed to be inherited from the reporting BSS.
Intersect the reported BSS profile with the reporting BSS and avoid such
element inclusion.
Signed-off-by: Sriram R <quic_srirrama@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
There are certain elements which should not be included in a per STA
profile.
Ignore such elements.
Signed-off-by: Sriram R <quic_srirrama@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Currently, upon receiving a Probe Request frame, per STA profile is
generated and added to the Probe Response frame. However, the per STA
profile remains unchanged unless there’s a property change in one of the
affliated link of the AP MLD. This approach introduces unnecessary delay
in forming and sending out the Probe Response frame.
To optimize this process, generate the per STA profile for each link at
the start and store it. When needed, it can be simply copied into the
Probe Response frame. Additionally, whenever there’s a change in the
link’s properties, re-generate the per STA profiles for all affiliated
links of the AP MLD.
As an initial step, copy the complete per STA profile and store it
within the links. The intersection with reporting BSS and inheritance
will be addressed in a subsequent change. Then finally, this will be
used to generate the Probe Response frame. As of this commit, no change
in adding per STA profiles in the Probe Response frame.
Signed-off-by: Sriram R <quic_srirrama@quicinc.com>
Co-developed-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
At present, the mld_link_info structure is nested within the mld_info
structure. However, a future modification will require mld_link_info to
be outside of mld_info. To address this, move the mld_link_info
structure to hostapd.h so that it can be accessed both in the current
context and in the location needed for the upcoming change.
No functional changes.
Signed-off-by: Sriram R <quic_srirrama@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Prior to initiating communication on a DFS channel, channel availability
check needs to be performed. During this period, the AP does not beacon.
Hence, no channel switch was allowed during this period. However, if a
user wishes to switch to a non-DFS channel during the potentially long
CAC period and start transmission immediately, there is no provision to
do that currently.
Extend the existing CHAN_SWITCH control interface command to allow
channel switch even when the AP is in CAC state. To do this, first
disable the interface to abort the CAC in progress and then configure
the interface with the new parameters and finally re-enable the
interface.
Signed-off-by: Amith A <quic_amitajit@quicinc.com>
In the send_assoc_resp() function, there’s a chance that the sta
argument could be NULL. Therefore, it’s crucial not to directly
dereference sta without first checking whether it’s a valid pointer.
However, commit 58ac46baf7 (“WNM: AP configuration to allow BSS max
idle period requests”) introduces direct dereferencing of max idle
period from sta, which might lead to a NULL pointer dereference. Fix
this now.
Fixes: 58ac46baf7 ("WNM: AP configuration to allow BSS max idle period requests")
Signed-off-by: Rameshkumar Sundaram <quic_ramess@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
The Bandwidth Indication subelement contains channel bandwidth, channel
center frequency, and optionally punctured subchannels.
As per IEEE P802.11be/D7.0, 35.15.3 (Channel switching methods for an
EHT BSS), if a Channel Switch Announcement element or an Extended
Channel Switch Announcement element is used to announce a switch to an
EHT BSS operating channel width wider than 160 MHz or to an EHT BSS
operating channel width including at least one punctured 20 MHz
subchannel, the Bandwidth Indication subelement in the Channel Switch
Wrapper element shall be present in the same frame.
Hence, add it into the Beacon and Probe Response frames under the above
mentioned conditions.
Signed-off-by: Karthik M <quic_karm@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
The Wide Bandwidth Channel Switch subelement was directly appended in
the Channel Switch Wrapper element function
hostapd_eid_wb_chsw_wrapper(). However, a subsequent change would add
Bandwidth Indication subelement in the Channel Switch Wrapper element.
Hence using the same function name would be confusing.
Hence, refactor the current code into two functions. The first function
hostapd_eid_chsw_wrapper() forms the channel switch wrapper element.
This calls hostapd_eid_wb_channel_switch() to add a Wide Bandwidth
Channel Switch subelement inside it.
No functionality change.
Signed-off-by: Karthik M <quic_karm@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
During MLO, an nl80211_cqm_event may be received by any BSS. Directing
this event to the first BSS may not be suitable as it might not
correspond to the link the event is meant for. Hence, there is a need to
handle this on per-BSS basis.
Therefore, handle nl80211_cqm_event per BSS. The event handler further
uses the address information present in the event to fetch the intended
link BSS if no matching STA entry was found based on the initial
ap_get_sta() call.
Signed-off-by: Manish Dharanenthiran <quic_mdharane@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
The hostapd_find_by_sta() function may be utilized by multiple driver
events. Therefore, it should be declared at the outset to ensure
accessibility by all event handlers.
No functional changes.
Signed-off-by: Manish Dharanenthiran <quic_mdharane@quicinc.com>
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
The Max Channel Switch Time element indicates the time delta between the
time the last beacon is transmitted by the AP in the current channel and
the expected time of the first Beacon frame transmitted by the AP in the
new channel.
IEEE P802.11be/D7.0, 35.3.11 (ML procedures for (extended) channel
switching and channel quieting) indicates that if an AP affiliated with
an AP MLD is switching channel, Max Channel Switch Time element shall be
included in every Beacon and Probe Response frame it transmits.
Add support to include the Max Channel Switch Time element in Beacon and
Probe Response frames during channel switch announcement for an AP
affiliated with an AP MLD.
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
These can be used outside the context of FST and hostapd.c, so move the
macro definitions into a shared header file. In addition, fix the
currently unused US_TO_TU() definition and rename "US" to "USEC".
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Currently, hapd->link is added to the MLD links list during driver
initialization and setup BSS operation. However, a call trace has been
observed where a BSS link item is not present in the list and an attempt
is made to delete it from the list. This scenario occurs during the
deinitialization operation, which calls hostapd_bss_link_deinit() and
tries to remove the hapd->link which is not present in the list.
Ensures that the link item is added to the list only after the
successful operation of link addition. Also ensure that mld->num_links
increments only when the addition is successful. Therefore, return from
hostapd_bss_link_deinit(), if mld->num_links is zero. Since the mld
object is shared among all the links, num_links has to be incremented
only when the addition is successful.
Call trace:
dl_list_del.lto_priv.9.lto_priv ()
hostapd_bss_link_deinit.lto_priv ()
hostapd_bss_deinit ()
hostapd_interface_deinit ()
hostapd_interface_deinit_free ()
hostapd_main ()
Signed-off-by: Sidhanta Sahu <quic_sidhanta@quicinc.com>
hostapd used to always enable only the group 19 when SAE groups were not
configured explicitly in hostapd.conf. This may cause undesired
connection delay with STAs which use group 20 as the primary group with
SAE-EXT-KEY AKM during SAE authentication attempt.
To avoid this, enable group 20 in default groups when AP supports
SAE-EXT-KEY and SAE groups have not been configured explicitly in
hostapd.conf.
Signed-off-by: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Currently only one scan can be performed on per phy level at a time in
the driver. Due to this, if another scan request is sent via anoother
underlying phy, the kernel returns -EBUSY. This would result in hostapd
trying to set the interface into station mode if it was originally in AP
mode and retry sending a scan request. However, this behavior is
expected in case of multi link operation and hence there is no need to
switch the mode as such.
Hence, add logic to not change the NL mode if the kernel returns -EBUSY
during multi link AP operation. The caller can accordingly decide and,
if needed, it can re-schedule a scan request after some time.
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
Currently, whenever a scan is started, it uses drv's first BSS only
whether it is AP or STA interface. However, with AP MLD related changes,
the same drv could be used by other BSSs as well which needs scanning.
Hence, the current logic will not work since scan needs to be handled on
a non-first BSS as well.
Move the logic of always using drv's first BSS during scan events to
using BSS on which the event arrived.
Also, for AP MLD operation, even though the BSS is same, the link BSS
also needs to be identified. Hence, add a back pointer in the BSS struct
which would be used to point to the link BSS which requested the scan on
that BSS. This will help in routing the scan events to an appropriate
BSS ctx.
Signed-off-by: Aditya Kumar Singh <quic_adisi@quicinc.com>
hostapd would send DISASSOC packet (after quiet DEAUTH) or DEAUTH packet
(after quiet DISASSOC) to the station after some inactivity timeout,
even though the command has tx=0 parameter. Fix this so that tx=0 cleans
the STA info without sending any DISASSOC or DEAUTH packets.
Signed-off-by: Gal Savion <gsavion@maxlinear.com>
This can be used with a clangd server to get code completion and cross
references in editor. To simplify the generation, create .cmd files for
most object files while building that contains the base directory and
command that was used when compiling it.
A very simple gen_compile_commands.py is provided which will read one or
more build directories and generate the compile_commands.json file for
it.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
This allows to use remote wpa_cli/hostapd_cli for:
- hwsim wrapper
- example test case
For example,
modprobe mac80211_hwsim radios=8
./run-tests.py -d hwsim0 -d hwsim1 -d hwsim2 -r hwsim3 -r hwsim4 -h ap_wpa2_psk -v
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@gmail.com>
Allow to skip user name when we run ssh user@hostname.
We can specify user name in .ssh/config and simplify using network name
spaces mapped per user.
An example .ssh/config:
Host localhost
HostName localhost
User root
Host test1
HostName testpc
User wlan1
Signed-off-by: Janusz Dziedzic <janusz.dziedzic@gmail.com>
If a scan triggers a regdom update into a 6 GHz-allowed regdom, and an
RNR element in one of the legacy band scan results points to a 6 GHz
scan result with a short SSID matching the current_ssid, delay
connection in favor of a 6 GHz-only scan. This will optimize the case in
which we first connect to a 5 GHz AP, then later roam to a 6 GHz one by
directly connecting to the 6 GHz one.
Signed-off-by: Matthew Wang <matthewmwang@chromium.org>
wpas_trigger_6ghz_scan() returns 1 on success and 0 on failure to
trigger the scan. Checking the return value to be less than zero is not
correct. This was supposed to check for success, i.e., greater than
zero.
Fixes: 42add3c27b ("Scan 6 GHz channels after change to 6 GHz-allowed regdom")
Signed-off-by: Matthew Wang <matthewmwang@chromium.org>
In P2P_GROUP_ADD command and GroupAdd dbus method, frequency is passed
in as a parameter when restarting a persistent group. This is the group
operating frequency determined out of band. Use this pre-determined
frequency in P2P client as well to expedite the P2P scan.
Signed-off-by: Jintao Lin <jintaolin@chromium.org>
Expose whether a 6 GHz scan is in progress with the ScanInProgress6GHz
property and flush properties as soon as the property is updated, so
that platforms can choose not to disconnect while a 6 GHz scan is in
progress. Once the 6 GHz scan has completed and scan results have been
received, the ScanInProgress6GHz property is reset to false.
Signed-off-by: Ruth Mekonnen <rmekonnen@chromium.org>
When non_coloc_6ghz = false, the STA is expected to scan for colocated
APs. However, if the colocated AP is on a non-PSC channel, it will not
be detected during the 6 GHz-only scan because the frequency list is
limited to PSC channels. Even when the NL80211_SCAN_FLAG_COLOCATED_6GHZ
is set, the cfg80211 only scans a subset of the channels in the original
6 GHz scan request. Therefore, this patch adds non-PSC channels to the
original 6 GHz scan request.
Signed-off-by: Ruth Mekonnen <rmekonnen@chromium.org>
The test to scan for a single BSSID assumed that there is only a single
neighbor in the candidate list. Also do this optimization if there are
multiple neighbors but only one of them is valid.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
This tests that the candidate list is used even if it is not required
because the abridged and preferred candidate list included bits are not
set.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
The preferred candidate list included bit just makes parsing the list
mandatory. The AP may still include a candidate list which we should use
to be able to optimize scanning. As such, always parse out the list but
still verify that if the list is not empty if the bit is set.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
There was an ancient code path to trigger a scan that was apparently
forgotten when the code was extended over time. It does not make any
sense to trigger a scan twice, so remove the earlier scan.
The earlier scan call was avoiding to trigger a new scan if a fixed
BSSID is configured. This seems like a reasonable restriction to do, so
add this check before starting a scan.
Consolidate everything so that scanning happens at the end of the
functions unless we bail out before. Add a "reset" label for all other
cases to ensure that we don't leave things in the a bad state.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
The dialog token must be non-zero. We are using this fact internally to
track the state in some cases, so ensure that the assumption is valid.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
According to Multiband Operation specification (r17, section 3.5.2),
a BSS Transition Management Request with the disassociation imminent
bit set should always be accepted.
This is enforced in case the request did not include a candidate list.
However, in case a candidate list was included but none of the APs in
the candidate list was found in the scan results, the request is
rejected.
Fix that by always accepting a request with the disassociation imminent
bit set even if no roaming candidate was found.
Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Many of the WNM tests assume that the supplicant will only select a
neighbor that was included in the candidate list. However, without the
abridged bit being set, the supplicant is allowed to also select any BSS
that is not explicitly included in the list.
Prepare for the supplicant handling the abridged bit by setting it in
the tests where relevant.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Having it in wnm_is_bss_excluded() is more generic as it works for other
locations (e.g., MLD link selection). So move the test and add a check
for the abridged bit while at it. Note that without the abridged bit
check another check would be needed (e.g., checking wnm_dialog_token) to
ensure that there isn't a rejection unless a BTM is in progress.
compare_scan_neighbor_results() calls wpa_scan_res_match() which calls
wnm_is_bss_excluded() so the previous behavior is maintained for WNM
scan result processing.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Following commits will move more checks into wnm_is_bss_excluded().
Prepare for that by changing the logical flow so that further checks can
be inserted.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
compare_scan_neighbor_results() was taking an age parameter to check
whether the BSS has been seen recently. This was used historically in a
codepath when no new scan was done. However, the logic was changed in
commit 20ed289a78 ("WNM: Clean up old scan data processing") and the
parameter is not used at all anymore as it is replaced by a different
logic. Remove it.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
ieee802_11_rx_bss_trans_mgmt_req() is already dealing with a lot of
things including the decisions on how to act on the frame. Split out
candidate list parsing to make it easier to work with the function.
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
