Commit graph

42 commits

Author SHA1 Message Date
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
Amar Singhal
9f42d49c55 Fix BSS RANGE command for no exact id match cases
The RANGE=N1-N2 command did not return any entries in some cases where
N1 does not match with any BSS entry. Fix this by allow entries to be
fetched even without knowing the exact id values.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2013-02-07 12:27:52 +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
485e3a9228 Interworking: Unshare ANQP results on explicit ANQP requests
When ANQP_GET or HS20_ANQP_GET is used to request ANQP information,
unshare the ANQP information (i.e., create a per-BSS copy of it) to
make sure the information from the specified BSS is available in case
the APs provide different information within HESSID.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-10-03 14:17:41 +03:00
Jouni Malinen
762b99db7a Fix last_scan_res update existing BSS entry is update
The BSS pointer may change if the entry needs to be reallocated
and the new pointer has to be added to the last_scan_res array
to avoid using pointers to freed memory.

Signed-hostap: Jouni Malinen <j@w1.fi>
2012-09-10 12:36:55 +02:00
Jouni Malinen
c739d7e968 Interworking: Store HESSID in BSS entry
This makes it more convenient to match BSS entries that belong to the
same homogenous ESS.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-09-04 17:08:58 +03:00
Jouni Malinen
476aed355a Interworking: Move BSS ANQP information into separate struct
This is an initial step in allowing the ANQP responses to be shared
among multiple BSSes if the BSSes are determined to be operating under
identical configuration.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-09-04 16:22:35 +03:00
Jouni Malinen
cf8baca6a5 BSS: Add wpa_bss_get_vendor_ie_multi_beacon()
This can be used to fetch vendor IEs from Beacon frames.

Signed-hostap: Jouni Malinen <j@w1.fi>
2012-09-02 19:54:42 +03:00
Jouni Malinen
a297201df1 Maintain list of BSS entries in last scan result order
This allows last results to be used even after they have been freed
since the information is copied to the BSS entries anyway and this new
array provides the order in which scan results were processed.

Signed-hostap: Jouni Malinen <j@w1.fi>
2012-09-02 19:53:15 +03:00
Paul Stewart
a6b71f726a bss: Don't remove a BSS that is in use
When looking for a BSS to eject due to too many entries, never
pick one that is in use.  Otherwise, we run the risk of having
pointers to freed data.

Signed-hostap: Paul Stewart <pstew@chromium.org>
2012-06-04 21:52:08 +03:00
Jay Katabathuni
25471fe3b9 HS 2.0: Add Hotspot 2.0 ANQP routines
Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-05-08 23:29:40 +03:00
Neeraj Kumar Garg
c772ef43f6 P2P: Update BSS entries in P2P group interface only if P2P IE is present
For concurrency scenarios we should not update the scan results without
P2P IE to P2P group interfaces. This patch is to take care if a scan has
been requested on STA interface and scan results are getting updated
from sibling to P2P group interface. A P2P GO Probe Response for a
legacy STA scan would be without P2P IE. So it will wrongly update the
BSS list of P2P group interface too when results are updated from
sibling.

Since P2P group interfaces are used only for connecting to a P2P group,
it is fine to filter out all non-P2P entries from their BSS table.

Signed-off-by: Neeraj Garg <neerajkg@broadcom.com>
2012-04-06 14:58:22 +03:00
Eliad Peller
eb37e085a4 BSS: Fix use-after-realloc
After reallocation of the bss struct, current_bss wasn't updated and
could hold an invalid pointer (which might get dereferenced later).

Update current_bss if the pointer was changed.

Signed-hostap: Eliad Peller <eliad@wizery.com>
intended-for: hostap-1
2012-03-05 17:09:55 +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
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
Jouni Malinen
0a70f34f22 P2P: Allow BSS entry to be fetched based on GO P2P Device Address
"BSS p2p_dev_addr=<P2P Device Address>" can now be used to fetch a
specific BSS entry based on the P2P Device Address of the GO to avoid
having to iterate through the full BSS table when an external program
needs to figure out whether a specific peer is currently operating as
a GO.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
2012-02-07 16:23:21 +02:00
Jouni Malinen
afc064fe7a Interworking: Add ANQP query requests
Add mechanism for using GAS/ANQP to query Interworking related
information from APs. The received information is stored in the BSS
table and can be viewed with ctrl_iface BSS command.

New ctrl_iface command ANQP_GET can be used to fetch ANQP elements from
a specific AP. Additional commands FETCH_ANQP and STOP_FETCH_ANQP can be
used to initiate and stop an iteration through all APs in the BSS table
that indicate support Interworking to fetch ANQP elements from them.
2011-10-16 23:55:34 +03:00
Jouni Malinen
018a309a94 Drop oldest unknown BSS table entries first
When the BSS table size limit has been reached, drop first the oldest
BSS entries for which there is not a matching network in the
configuration based on SSID (wildcards are ignored). This makes it
less likely to hit connection issues in environments with huge number
of visible APs.
2011-07-16 13:22:58 +03:00
Jouni Malinen
f4fbba8cf9 Distinguish empty concatenated vendor-specific IE from missing one
When comparing BSS table entries, handle empty concatenated
vendor-specific IE differently from completely missing IE. This
does not change anything for the only currently compared IE that
can be fragmented (WPS IE), but it is better to have the generic
code here ready for any possible new IE that could be used in
with zero-length data.
2011-04-14 02:25:43 +03:00
Sam Leffler
78633c3709 wpa_supplicant: Parameterize BSS table expiration age + count
Replace compile-time BSS cache expiration age and scan count by config
parameters that can be set via wpa_cli and the new D-Bus API. The latter
is done with interface properties BSSExpireAge and BSSExpireCount.
2011-03-20 12:40:59 +02:00
Nathan Williams
bc8397822b wpa_supplicant: Search BSS list from back to front
This fixes an issue seen in our wifi testbed, where we frequently
switch the SSID of the AP. wpa_supplicant's BSS list will have, for
example both <bssid, "Check11b"> (from the previous test) and <bssid,
"Check11g"> (from the current test) - note that the bssid is the same for
both. The (old) D-Bus API for fetching scan responses from wpa_supplicant
is fetch-by-bssid, so the caller (flimflam) incorrectly believes we're
associated with <bssid, "Check11b">.
2011-03-20 12:06:36 +02:00
Sam Leffler
2b65b30da8 dbus: Add D-Bus methods to flush the BSS cache
Add an "Interface.FlushBSS" method to the new D-Bus API and a "flush"
method to the old API. Both take an age parameter that is a threshold
(in seconds) for selecting entries to evict. Setting this parameter
to zero flushes all entries from the cache.

This mechanism is useful for a connection manager to clear state at
startup and on resume (where the age parameter may be used to hold
onto recent/valid data).
2011-03-20 12:02:33 +02:00
Ben Greear
f049052b9e Use wpa_msg() instead of wpa_printf()
This converts number of debugging messages to use wpa_msg() in order
to allow the interface name to be shown with the messages.

A new function, wpa_dbg(), is introduced to allow
CONFIG_NO_STDOUT_DEBUG=y builds to remove the debug strings. This is
otherwise identical with wpa_msg(), but it gets compiled out if stdout
debugging is disabled.
2011-02-10 20:14:46 +02:00
Jouni Malinen
0c6b310e83 P2P: Show P2P info in ctrl_iface scan results 2010-09-09 07:17:18 -07:00
Jouni Malinen
c9c38b0996 Make maximum BSS table size configurable
New global configuration parameter bss_max_count can now be used to
change the maximum BSS table size. The old fixed size limit (200) is
used as the default value for this parameter.
2010-03-05 20:20:09 +02:00
Witold Sowa
7899e2f42d dbus: Change WPA/RSNIE byte array props to dicts
Expose RSN and WPA properties for BSS objects containing information
about key management and cipher suites. Get rid of WPA/RSN/WPSIE
byte array properties and add IEs byte array property with all IE data
instead.
2010-01-16 16:37:37 +02:00
Jouni Malinen
8c0906542c Fetch IEs from both Beacon and Probe Response frames if available
This allows the driver wrappers to return two sets of IEs, so that
the BSS code can use information from both Beacon and Probe Response
frames if needed. For example, some Cisco APs seem to include more
information in Wireless Provisioning Services IE when it is in the
Beacon frame.
2010-01-16 16:11:05 +02:00
Jouni Malinen
20766f2007 Make wpa_bss_get_max_rate() a bit more readable with a local variable 2010-01-10 22:53:36 +02:00
Jouni Malinen
728e776c09 Fix alloc validation in wpa_bss_get_bit_rates()
Need to check the value returned by os_malloc(), not the pointer to
this value.
2010-01-09 23:56:09 +02:00
Witold Sowa
158c6c7467 dbus: Add BSS property change notifications 2010-01-06 20:03:01 +02:00
Witold Sowa
75d328af50 dbus: Change BSS property MaxRate to Rates
Instead of exposing maximum BSS bit rate, expose sorted array
of all supported rates.
2010-01-04 16:52:30 +02:00
Jouni Malinen
d1f9c410c1 Remove src/drivers/scan_helpers.c
Most of this file was already moved into wpa_supplicant/scan.c and
we can remove the file completely by having couple of small helper
functions copied to the remaining users outside core wpa_supplicant
code.
2010-01-03 20:27:32 +02:00
Jouni Malinen
7d7d57b2dc Use shared function for figuring out if BSS is in use
The BSS that is currently in use must not be freed even if it does
not show up in scan results.
2010-01-03 10:55:31 +02:00
Jouni Malinen
1c83b67efd Fix memory corruption on BSS entry reallocation
The wpa_s->bss_id list was being corrupted when the BSS entry needed
to be reallocated due to longer IE data. The entry has to be removed
from all lists before reallocation to avoid this (it was only removed
from the wpa_s->bss list).
2010-01-03 01:25:43 +02:00
Jouni Malinen
8f770587d9 Maintain a pointer to the current BSS table entry 2010-01-02 16:59:19 +02:00
Jouni Malinen
8d923a4acf Only expire scanned BSSes based on new scan results
Get more information about scans when updating BSS table information.
This allows the missing-from-scans expiration rule to work properly
when only partial set of channels or SSIDs are being scanned.
2010-01-02 13:57:44 +02:00
Jouni Malinen
59f2caa925 WPS: Use BSS table instead of raw scan results 2010-01-02 13:36:12 +02:00
Jouni Malinen
e5fc8c8ce5 Fix crash on BSS deinit getting called before BSS init 2009-12-28 12:11:23 +02:00
Jouni Malinen
99a6a63f25 Add wpa_bss_get_max_rate() to match with old scan_res helpers 2009-12-28 01:09:32 +02:00
Jouni Malinen
f0d126d339 Add ctrl_iface events for BSS added/removed 2009-12-28 00:42:51 +02:00
Jouni Malinen
d4bf8f132a Add BSS list sorted by id and add some helper functions
This allows the BSS list to be iterated in order of increasing id
to avoid problems with new scans reordering entries. The order on the
wpa_s->bss list changes with most recently updated entries being moved
to the tail of the list while wpa_s->bss_id list maintains its order
with new entries being added to the tail and old entries being removed
when they expire.
2009-12-28 00:30:38 +02:00
Jouni Malinen
83922c2d34 Add BSS table to track scan results without dropping information
Collect information from scan results into a BSS table that will not
expire information as quickly as scan results where every new scan,
no matter for how limited set of channels/SSIDs, clears all old
information.

For now, this is only used for D-Bus BSS added/removed notifications,
but this will likely be extended to be used internally instead of the
scan results to better support partial scans.
2009-12-27 21:07:47 +02:00