Commit graph

113 commits

Author SHA1 Message Date
David Spinadel
7ed52f678b wpa_supplicant: Save prev_sched_ssid only if needed
If the whole ssid list was scanned, don't save the prev scheduled ssid
since we are going to start from beginning. Thos avoids starting sched
scan from prev_sched_ssid after scanning the full list, in case of
adding a network to ssid during scheduled scan.

Signed-hostap: David Spinadel <david.spinadel@intel.com>
2013-03-10 17:32:03 +02:00
David Spinadel
a09fc1ccf8 wpa_supplicant: Do not allow too short sched scan
In case that the ssid list is longer than max number of ssids,
ths scheduled scan aborted after timeout and rescheduled again
with shorter timeout and longer interval. In case that the timeout
is shorter than the interval, only one scan iteration will
be run. In this case, go back to the initial values.

Signed-hostap: David Spinadel <david.spinadel@intel.com>
2013-03-10 17:27:48 +02:00
Jouni Malinen
c5f10e804a Use more accurate timestamps for scan results
For various P2P use cases, it is useful to have more accurate timestamp
for the peer information update. This commit improves scan result
handling by using a single timestamp that is taken immediately after
fetching the results from the driver and then using that value to
calculate the time when the driver last updated the BSS entry. In
addition, more debug information is added for P2P peer updates to be
able to clearly see how old information is being used here.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2013-02-12 19:14:32 +02:00
Dmitry Shmidt
66fe0f703c Add 'SCAN TYPE=ONLY' functionality
Usual manual scan request may cause reassociation due to several
reasons. New command is intended to perform pure scan without taking any
automatic action based on the results.

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
2013-02-07 18:09:50 +02:00
Jouni Malinen
5ebe8c8179 HS 2.0: Fix IE buffer length for extra scan IEs
The HS 2.0 Indication element is 7 (not 6) octets. The previous
implementation could result in wpabuf validation code stopping the
program if HS 2.0 was enabled without Interworking or P2P (which would
have created a large enough buffer to avoid hitting this) being enable.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2013-02-05 17:40:09 +02:00
Pontus Fuchs
9e737f08d4 Update scan interval gracefully
When the scan interval is changed the new interval is effective
after the old interval timer fires off one last time. This can cause
an unacceptable long delay when updating the interval.

Change this behaviour to use MIN(left of old interval, new interval)
for the scan interval following the interval change.

Signed-hostap: Pontus Fuchs <pontus.fuchs@gmail.com>
2013-02-03 18:14:05 +02:00
Jouni Malinen
e4296380e0 Remove unused wpa_scan_get_vendor_ie_multi_beacon()
Signed-hostap: Jouni Malinen <j@w1.fi>
2012-12-27 12:31:06 +02:00
Jouni Malinen
2c09af3068 Add Doxygen documentation for functionality related to scanning
Signed-hostap: Jouni Malinen <j@w1.fi>
2012-12-27 12:29:05 +02:00
Jouni Malinen
4115303bbe Document wpa_s->scan_req
Use an enum with documented values to make it easier to understand how
wpa_s->scan_req is used.

Signed-hostap: Jouni Malinen <j@w1.fi>
2012-11-25 15:55:32 +02:00
Jouni Malinen
5cc7032239 P2P: Avoid multi-channel scans when they are not needed
If the driver does not support multi-channel concurrency and a virtual
interface that shares the same radio with the current interface is
operating there may not be need to scan other channels apart from the
current operating channel on the other virtual interface. Filter out
other channels in case we are trying to find a connection for a station
interface when we are not configured to prefer station connection and a
concurrent operation is already in process.

Signed-hostap: Jouni Malinen <j@w1.fi>
2012-11-25 12:47:43 +02:00
Jouni Malinen
23270cd8f5 Restore wpa_s->scan_req if scan trigger fails
If the driver rejects the scan request while handling an external
requested scan (e.g., SCAN command on ctrl_iface), wpa_s->scan_req gets
cleared in wpa_supplicant_scan(). This can results in issues when the
scheduled re-try of the scan in one seconds trigger another call to this
function. If ap_scan==2 mode is used, this would result in new
association attempt instead of a new scan. Avoid this by restoring value
of wpa_s->scan_req in case the scan trigger fails and a new scan attempt
is scheduled.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-10-30 12:27:05 +02:00
Jouni Malinen
7a808c7eb7 P2P: Allow P2P functionality to be disabled per interface
By default, P2P is enabled globally for all virtual interfaces and this
makes wpa_supplicant include WSC and P2P IEs in Probe Request frames for
all scans even if this is for a non-P2P station connection to speed up
device discovery. If an interface is dedicated for non-P2P station mode
operations, it is now possible to disable addition of WSC and P2P IEs
into Probe Request frames with a per-interface p2p_disabled parameter.
This can be set either in the configuration file (p2p_disabled=1) or at
run time ("wpa_cli -i wlan0 set p2p_disabled 1"). Unlike the previous
mechanism ("wpa_cli p2p_set disabled 1"), the new parameter changes the
behavior only for the specified interface while other interfaces
continue to follow the global P2P enabled/disabled state.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-10-10 13:08:23 +03:00
Jouni Malinen
4c490780e2 P2P: Fix pending-sta-scan processing for concurrent operation cases
If two P2P_FIND commands and a station mode SCAN command are issued in a
sequence with the second P2P_FIND and SCAN commands started before the
initial scan from the first P2P_FIND command has completed,
sta_scan_pending may be left set without an automatic way of getting it
cleared. This can get P2P search stuck if no further station mode scan
operations are run.

Fix this by clearing the sta_scan_pending flag whenever station mode scans
are stopped due to no enabled networks resulting in INACTIVE mode getting
entered. In addition, avoid setting sta_scan_pending flag when a special
scan_res_handler is set so that this does not get enabled on the P2P
Device interface during a P2P search operation.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-09-24 13:46:27 +03:00
Jouni Malinen
ac06fb12f5 P2P: Add more debug prints for GO start routines
This makes it easier to debug issues in starting GO mode.

Signed-hostap: Jouni Malinen <j@w1.fi>
2012-09-24 01:05:51 +03:00
Jouni Malinen
d4534bde9c Add debug print for no-enabled-networks case
If there are any disabled networks, show a debug print with the count
of those networks when no enabled networks are found. This can be
helpful in trying to figure out why scans are being skipped.

Signed-hostap: Jouni Malinen <j@w1.fi>
2012-09-24 01:04:00 +03:00
Jouni Malinen
e665ca9a8d P2P: Move p2p_cb_on_scan_complete to global context
Since we have a global P2P module, the flag to trigger scan completion
events to it needs to be in similar context. The previous design
maintained this separately for each virtual interface and if P2P module
did not run its scan operation on the virtual interface that completed
the scan, P2P module would not be allowed to restart operations
properly.

Signed-hostap: Jouni Malinen <j@w1.fi>
2012-09-13 17:58:22 -07:00
Jouni Malinen
4d5bda5fca Interworking: Add optional use of network selection on normal scans
auto_interworking=1 configuration parameter can be used to request
wpa_supplicant to use Interworking network selection automatically as a
part of the normal (non-Interworking) network selection if the scan
results do not match with enabled networks. This makes scanning work
similarly to the "interworking_select auto" command.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-08-28 16:14:13 +03:00
Jouni Malinen
99fcd40409 P2P: Allow scan operations during p2p_find
Previously, all station mode scan operations were either skipped or
delayed while any P2P operation was in progress. To make concurrent
operations easier to use, reduce this limitation by allowing a scan
operation to be completed in the middle of a p2p_find. In addition,
allow station mode association to be completed. When the station mode
operation is run to its completion (scan results not acted on,
connection to an AP completed, connection failed), resume the p2p_find
operation.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-08-23 19:42:53 +03:00
Eyal Shapira
a13e07ec4d Fix adding extra IEs in sched scan
Refactoring done in commit 46ee0427b1
(IEEE 802.11u: Allow Interworking and HESSID to be configured)
broke adding extra IEs in sched scan. The IEs stopped being added
to the scan params within wpa_supplicant_extra_ies() but no code
was added to add them in wpa_supplicant_req_sched_scan().
Fix this and remove unused params arg in wpa_supplicant_extra_ies().

Signed-hostap: Eyal Shapira <eyal@wizery.com>
intended-for: hostap-1
2012-08-13 21:48:55 +03:00
Jouni Malinen
067ffa2696 Convert os_realloc() for an array to use os_realloc_array()
Signed-hostap: Jouni Malinen <j@w1.fi>
2012-08-13 21:21:23 +03:00
Jouni Malinen
b9b12d02f0 autoscan: Fix potential freeing of uninitialized pointer
Commit 7c865c6853 introduced a code
path that can skip extra_ie initialization in wpa_supplicant_scan().
This could result in semi-random crashes when using the autoscan
mechanism. Fix this by initializing extra_ie to NULL.

Signed-hostap: Jouni Malinen <j@w1.fi>
2012-07-03 20:54:40 +03:00
Tomasz Bursztyka
7c865c6853 Add automatic scanning support
Like bgscan, autoscan is an optional module based feature to automate
scanning but while disconnected or inactive.

Instead of requesting directly a scan, it only sets the scan_interval
and the sched_scan_interval. So, if the driver supports sched_scan,
autoscan will be able to tweak its interval. Otherwise, the tweaked
scan_interval will be used. If scan parameters needs to be tweaked, an
autoscan_params pointer in wpa_s will provide those. So req_scan /
req_sched_scan will not set the scan parameters as they usually do, but
instead will use this pointer.

Modules will not have to request a scan directly, like bgscan does.
Instead, it will need to return the interval it wants after each
notification.

Signed-hostap: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
2012-06-26 18:55:41 +03:00
Jouni Malinen
1cbe86e2d6 Add debug prints of scan result IEs
Excessive debug level can now be used to dump the IEs received in scan
results from both Beacon and Probe Response frames. This makes it easier
to debug issues where the driver (or well, more likely cfg80211) does
not update the IEs based on Beacon frames if even a single Probe
Response frame has been received.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-05-11 15:30:05 +03:00
Jouni Malinen
349493bd0c Validate WEP key lengths based on driver capabilities
The nl80211 driver interface does not allow 128-bit WEP to be used
without a vendor specific cipher suite and no such suite is defined for
this purpose. Do not accept WEP key length 16 for nl80211 driver
interface forn ow. wext-interface can still try to use these for
backwards compatibility.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-05-10 14:34:46 +03:00
Jay Katabathuni
c923b8a537 HS 2.0: Add Hotspot 2.0 indication into Probe Request
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-05-08 23:29:58 +03:00
Jouni Malinen
fea7c3a055 Ignore network blocks that have invalid WEP key length
Do not try to associate with a network that has an invalid or incomplete
configuration because the association or at least data connection would
fail anyway. This commits adds a common function for checking whether a
network block is disabled to make it easier to check network blocks
without having to reject them during configuration file parsing (which
would prevent wpa_supplicant from starting). The only additional check
added in this commit is to verify the WEP key length. Similar checks for
other parameters can be added in future commits.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-05-07 13:39:33 +03:00
Jouni Malinen
b55aca4672 Fix sched_scan for max-num-of-scan_ssid=1 networks
When the network configuration includes exactly the number of
scan_ssid=1 networks as the driver supports for scan_sched and no
networks need wildcard SSID scan, there is no need to use sched_scan
timeout. Check this condition and optimize this case to avoid the extra
sched_scan start/stop operations.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-04-17 16:51:09 +03:00
Jouni Malinen
7d21a223f1 Fix sched_scan debug print regarding timeout
The debug messages were showing the opposite of what the actual
implementation was doing for sched_scan timeout.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-04-17 16:32:40 +03:00
Jouni Malinen
54ddd74369 Add disable_scan_offload parameter to disable automatic scan offloading
This new configuration parameter can be used to disable automatic
offloading of scan requests to the driver which was previously used
by default if the driver supported sched_scan.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-04-17 16:30:15 +03:00
Jouni Malinen
85ea132a13 P2P: Use scan optimization for post-provisioning connection
Since P2P GO cannot change the SSID after WPS provisioning step, we
can use the specific SSID for the scan for data connection. In addition,
mark this as p2p_probe to avoid unnecessary use of 802.11b rates.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-02-29 00:34:53 +02:00
Jouni Malinen
a21c05db23 P2P: Use specific SSID in scan for provisioning step
Since the P2P client learns the SSID of the group during GO Negotiation,
use the specific SSID in the Probe Request frames during the
provisioning step. This helps in avoiding unnecessary Probe Response
frames from other P2P GOs or APs.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-02-29 00:02:34 +02:00
Jouni Malinen
360182ed7c P2P: Advertise immediate availability of WPS credential
Use Device Password ID in WSC IE of Probe Request and Probe Response
frames to advertise immediate availability of WPS credentials per P2P
specification sections 3.1.2.1.1 (Listen State), 3.1.2.1.2 (Scan Phase),
and 3.1.2.1.3 (Find Phase).

For now, the Device Password ID is set only for the case where we are
active GO Negotiation with a specific peer. In practice, this means that
the Probe Response frames during pending GO Negotiation (whenever in
Listen state) indicate availability of the credential.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-02-27 23:14:35 +02:00
Jouni Malinen
d445a5cd8e Add BSSID filter for testing purposes
wpa_supplicant can now be configured to filter out scan results based
on a BSSID filter. Space-separated set of allowed BSSIDs can be set
with wpa_cli set bssid_filter command. Filtering mechanism can be
disabled by setting this variable to an empty list. When set, only
the BSSes that have a matching entry in this list will be accepted
from scan results.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-02-16 16:30:13 +02:00
Jouni Malinen
aa283ddd97 WPS: Do not use sched_scan for provisioning step
Normal scan is more reliable and faster for WPS operations and since
these are for short periods of time, the benefit of trying to use
sched_scan would be limited. This can fix WPS connectivity issues
with some drivers.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
intended-for: hostap-1
2012-02-15 20:41:42 +02:00
Jouni Malinen
0f3d578efc Remove the GPL notification from files contributed by Jouni Malinen
Remove the GPL notification text from the files that were
initially contributed by myself.

Signed-hostap: Jouni Malinen <j@w1.fi>
2012-02-11 19:39:36 +02:00
Eyal Shapira
b3aa456b3e Interleave wildcard and specific SSID scans when max_ssids=1
For drivers limited to scan a single SSID at a time, this prevents
waiting too long for a wildcard scan in case there are several
scan_ssid networks in the configuration.

Signed-hostap: Eyal Shapira <eyal@wizery.com>
2012-01-29 17:39:08 +02:00
Jouni Malinen
b21ff9cb20 P2P: Fix WSC IE inclusion for P2P disabled case
wpas_wps_in_use() was forcing WPS to be enabled unconditionally if P2P
support was included in the build. This is not really the correct
behavior for the case when P2P has been disabled at runtime. Change the
code here to verify runtime configuration of P2P before forcing WPS to
be enabled. This allows WSC IE to be left out from Probe Request frames
when scanning for APs without P2P or WPS being in use.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-01-27 21:09:34 +02:00
Jouni Malinen
1e7fb4f1b7 WPS: Use single channel scan if AP channel already known
If the BSSID of the AP is specified in the WPS command, the target
AP is likely already in the BSS table and its operating channel is
known. Use this information to speed up connection by only scanning
the known channel.

Signed-hostap: Jouni Malinen <j@w1.fi>
2011-12-31 13:17:20 +02:00
Jouni Malinen
76202aed23 Fix compiler warning with CONFIG_NO_STDOUT_DEBUG=y
Signed-hostap: Jouni Malinen <j@w1.fi>
2011-12-11 18:13:51 +02:00
Jouni Malinen
ea5bae4731 Increase min sched_scan interval from 2 to 10 seconds
Trying to run sched_scan round every two seconds by defaults sounds way
too frequent since dualband cards are unlikely to be able to complete
the full scan cycle in two seconds. For now, set the hardcoded value to
10 seconds to make this somewhat more reasonable.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2011-11-29 20:05:58 +02:00
Jouni Malinen
0b7a25c00f Use normal scan before sched_scan if that can speed up connection
When normal scan can speed up operations, use that for the first three
scan runs before starting the sched_scan to allow user space sleep more.
We do this only if the normal scan has functionality that is suitable
for this or if the sched_scan does not have better support for multiple
SSIDs.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2011-11-28 18:36:36 +02:00
Jouni Malinen
76a5249e52 Add broadcast SSID for sched_scan for scan_ssid=0 networks
Previously, only networks with scan_ssid=1 were included in sched_scan.
This needs to behave similarly to the normal scan where broadcast SSID
is used to find networks that are not scanned for with a specific SSID.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2011-11-28 18:12:38 +02:00
Jouni Malinen
5edddf4175 Use common code for disabled network case in sched_scan
There is no need to implement two copies of the iteration code here.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2011-11-28 18:09:37 +02:00
Jouni Malinen
86b47aaf36 Drop sched_scan filter if not enough match sets supported
Instead of including only a single SSID in the sched_scan request if
the driver does not support match sets, just drop the SSID filter and
configure more SSIDs up to the sched_scan limit.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2011-11-28 17:52:36 +02:00
Jouni Malinen
a8cb5a8897 Make sched_scan debug clearer on timeout use
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2011-11-28 17:52:02 +02:00
Jouni Malinen
7c6a266ced Fix sched_scan filter_ssids setting for no filters case
The filter_ssids pointer needs to be set to NULL if no SSID filters
are set to avoid filtering out all scan results.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2011-11-28 15:19:41 +02:00
Jouni Malinen
fcd1684787 Fix sched_scan filter setting for max_match_sets == 0
The previous implementation was trying to add the first SSID
to a zero-length array. Avoid this with an explicit validation
of the array length.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2011-11-25 18:12:04 +02:00
Jouni Malinen
3f56f3a496 Do not try to add wildcard SSID into active sched_scan
Even though scan_ssid should not really be set for wildcard SSID,
better verify that here explicitly insead of assuming that the
SSID is set.

Signed-hostap: Jouni Malinen <j@w1.fi>
2011-11-19 17:01:53 +02:00
Eyal Shapira
1966e3d1b7 sched scan: Fix passive scanning
Scan wasn't initiated in case the config contained only networks without
scan_ssid. In such a case we want scan to be initiated without any SSIDs
to actively scan but include all the SSIDs in the filter list. Also
added some debug logs to easily see which SSIDs were included in which
list.

Cc: Luciano Coelho <coelho@ti.com>
Signed-off-by: Eyal Shapira <eyal@wizery.com>
2011-11-18 23:05:57 +02:00
Jouni Malinen
aa820e02cc Clean up debug dump for scan results sorting
There is not much need for showing the interim qsort steps, so just show
the ordered results.

Signed-hostap: Jouni Malinen <j@w1.fi>
2011-10-30 21:08:34 +02:00