Store list of all discovered BSSes in the ESS and on which frequencies
they have been seen. Use this information to dynamically generated the
list of channels for background scans.
The AP configuration may change after provisioning, so it is better
not to use the current security policy to prioritize results. Instead,
use WPS Selected Registrar attribute as the main sorting key and use
signal strength next without considering security policy or rate sets.
The non-WPS provisioning case remains as-is, i.e., this change applies
only when trying to find an AP for WPS provisioning.
Addition of the background scanning mechanism in commit
60b94c9819 moved the scan trigger
into a new function that was also incrementing the scan_runs
counter, but the removal of the previous scan_runs incrementation
was forgotten from that patch. This counter should only be updated
into a single location, so remove the old one. This improves AP
selection for WPS provisioning by not skipping some of the initial
scans.
wps_er_config can now be used to configure an AP. It is similar to
wps_er_learn, but instead of only learning the current AP settings,
it continues to send M8 with the new settings for the AP.
wps_er_start command now takes an optional parameter that can be used
to configure a filter to only allow UPnP SSDP messages from the
specified IP address. In practice, this limits the WPS ER operations
to a single AP and filters out all other devices in the network.
This avoids an invalid D-Bus call during interface initialization.
The wpa_state change can happen before the D-Bus interface is set up,
so we must be preparted to handle this early event signal. In theory,
it should be possible to reorder initialization code to make sure
D-Bus signals are ready, but that would likely require quite a bit of
code restructuring, so it looks like a safer option for now is to just
skip the early event.
The wpa_supplicant compilation with CONFIG_AP option and without
CONFIG_IEEE80211R, CONFIG_WPS, NEED_SME, CONFIG_CLIENT_MLME options
results in following messages.
../src/ap/drv_callbacks.o: In function `hostapd_notif_assoc':
../src/ap/drv_callbacks.c:59: undefined reference to
`ieee802_11_parse_elems'
gmake: *** [wpa_supplicant] Error 1
Add a new wpa_supplicant state: interface disabled. This can be used
to allow wpa_supplicant to be running with the network interface even
when the driver does not actually allow any radio operations (e.g.,
due to rfkill).
Allow driver_nl80211.c and driver_wext.c to start while rfkill is in
blocked state (i.e., when ifconfig up fails) and process rfkill
events to block/unblock WLAN.
Use regular expression matches to see if input is not the (now translated?)
string "Select any network" and is a "<network id>: <ssid>" string or the
"all" keyword where that is applicable.
Signed-off-by: Kel Modderman <kel@otaku42.de>
This allows wpa_supplicant to be started quickly with an empty
configuration. If an external program wants to fetch scan results
from wpa_supplicant, it will need to request a scan explicitly
in this type of case.
Add "wpa-ft-psk", "wpa-psk-sha256", "wpa-ft-eap" and "wpa-eap-sha256"
possible KeyMgmt values of interface capabilities to fit values in
BSS RSN options dictionary.
This adds more details into the CTRL-EVENT-DISCONNECTED event to
make it easier to figure out which network was disconnected in some
race conditions and to what could have been the reason for
disconnection. The reason code is currently only available with
the nl80211 driver wrapper.
These bursts can result in control interface monitors being detached
even if the external program is still working properly. Use much larger
error threshold for ENOBUFS to avoid this.
There is no absolute requirement for separating address allocation
into separate functions, so simplify the driver wrapper interface
to use just if_add and if_remove instead of adding the new
alloc_interface_addr() and release_interface_addr() functions.
if_add() can now indicate if the driver forced a different interface
name or address on the virtual interface.
Scan only the frequency that was used during provisioning during the
first five scans for the connection. This speeds up connection in the
most likely case where the AP remains on the same channel. If the AP is
not found after these initial scans, all channels will be scanned.
'wpa_cli roam <bssid>' can now be used to test roaming within an ESS
(e.g., for FT over-the-air). This command will bypass a new scan and
will select the BSS based on the specified BSSID. It is responsibility
of the caller to make sure that the target AP is in the BSS table.
This can be done, e.g., by running a scan before the roam command,
if needed.
Instead of parsing the IEs in the callers, use the already existing
parser in wpa_ft.c to handle MDIE and FTIE from initial MD association
response. In addition, this provides more complete access to association
response IEs to FT code which will be needed to fix FT 4-way handshake
message 2/4.
This sets the FT Capability and Policy field in the MDIE to the values
received from the target AP (if available). This fixes the MDIE contents
during FT Protocol, but the correct value may not yet be used in initial
mobility domain association.
When using wpa_supplicant SME (i.e., using nl80211), the rsn_supp
module was not informed of the WPA/RSN IE that was used in
(Re)Association Request frame. This broke roaming between APs that
use different security policy (e.g., changing between WPA/TKIP and
WPA2/CCMP APs) or when using PMKSA caching.
This allows bgscan modules to use more information to decide on when
to perform background scans. bgscan_simple can now change between
short and long background scan intervals based on signal strength
and in addition, it can trigger immediate scans when the signal
strength is detected to be dropping.
bgscan_simple takes following parameters now:
short interval:signal strength threshold:long interval
For example:
bgscan="simple:30:-45:300"
This can be used to limit which frequencies are considered when
selecting a BSS. This is somewhat similar to scan_freq, but will
also affect any scan results regardless of which program triggered
the scan.
Need to kill the monitor process before running detach command on
the monitor connection to avoid race where the monitor process may
end up getting the detach command result.
Previously, this was only done with userspace MLME (i.e., driver_test.c);
now, driver_nl80211.c can deliver the FT Action Response (FT-over-DS)
for processing. The reassociation after successful FT Action frame
exchange is not yet implemented.
Despite comments in the wpa_config_update_prio_list(struct wpa_config
*config) telling that it is called "if priority for a network is
changed", it is apparently not.
Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>
This patch allows wpa_supplicant to compile on Debian's kfreebsd
architectures.
Patch by Stefan Lippers-Hollmann based on work done by Petr Salinger
and Emmanuel Bouthenot for 0.6.X (http://bugs.debian.org/480572).
filter_ssids=1 global configuration parameter can now be used to
enable scan result filtering (with -Dnl80211 only for now) based on
the configured SSIDs. In other words, only the scan results that have
an SSID matching with one of the configured networks are included in the
BSS table. This can be used to reduce memory needs in environments that
have huge number of APs.
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.
wpa_supplicant can now be notified of suspend/resume events, e.g.,
from pm-action scripts. This allows wpa_supplicant to clear information
that may become invalid during a suspend operation.
This is needed to allow the BSS table entry for the previously used
BSS to be removed. Now wpa_bss_in_use() can return 0 for the last BSS
that was used as soon as deauthentication/disassociation event has been
received.
Some drivers may need to use a specific ifname for the virtual
interface, so allow them to do this with a new parameter passed
to the alloc_interface_addr() handler.
CFLAGS += -DCONFIG_WPA_CLI_FORK=y in .config can be used to
configure wpa_cli build to make a version of wpa_cli that forks
a child process to receive event messages. This allows the events
to be shown immediately instead of having to wait for the next
periodic poll with PING.
This allows external programs (e.g., UI) to get more information
about server certificate chain used during TLS handshake. This can
be used both to automatically probe the authentication server to
figure out most likely network configuration and to get information
about reasons for failed authentications.
The follow new control interface events are used for this:
CTRL-EVENT-EAP-PEER-CERT
CTRL-EVENT-EAP-TLS-CERT-ERROR
In addition, there is now an option for matching the server certificate
instead of the full certificate chain for cases where a trusted CA is
not configured or even known. This can be used, e.g., by first probing
the network and learning the server certificate hash based on the new
events and then adding a network configuration with the server
certificate hash after user have accepted it. Future connections will
then be allowed as long as the same server certificate is used.
Authentication server probing can be done, e.g., with following
configuration options:
eap=TTLS PEAP TLS
identity=""
ca_cert="probe://"
Example set of control events for this:
CTRL-EVENT-EAP-STARTED EAP authentication started
CTRL-EVENT-EAP-PROPOSED-METHOD vendor=0 method=21
CTRL-EVENT-EAP-METHOD EAP vendor 0 method 21 (TTLS) selected
CTRL-EVENT-EAP-PEER-CERT depth=0 subject='/C=US/ST=California/L=San Francisco/CN=Server/emailAddress=server@kir.nu' hash=5a1bc1296205e6fdbe3979728efe3920798885c1c4590b5f90f43222d239ca6a
CTRL-EVENT-EAP-TLS-CERT-ERROR reason=8 depth=0 subject='/C=US/ST=California/L=San Francisco/CN=Server/emailAddress=server@kir.nu' err='Server certificate chain probe'
CTRL-EVENT-EAP-FAILURE EAP authentication failed
Server certificate matching is configured with ca_cert, e.g.:
ca_cert="hash://server/sha256/5a1bc1296205e6fdbe3979728efe3920798885c1c4590b5f90f43222d239ca6a"
This functionality is currently available only with OpenSSL. Other
TLS libraries (including internal implementation) may be added in
the future.
When multiple APs are present in scan results with similar signal
strength, wpa_supplicant may end up bounching between them frequently
whenever new scan results are available (e.g., due to periodic scans
requested by NetworkManager). This can result in unnecessary roaming
and in case of the current cfg80211 version, to frequent network
disconnections.
Do not request a roam if the current BSS is still present in the scan
results and the selected BSS is in the same ESS and has only a slighly
stronger signal strength.
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.
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.
idx == 0 should be enough to make sure that the addr is set, but
verify that this is indeed the case to avoid any potential issues if
auth_set_key() gets called incorrectly.
There was an extra semicolon that broke the calculation of registered
properties and resulted in obj_desc->prop_changed_flags not being
allocated long enough for all the flags.
The path pointer used as the timeout_ctx was not constant; the path
string itself may have been the same, but the pointer certainly was not
since it was sometimes from stack and sometimes from the dynamically
allocated buffer in obj_desc. This caused some of the eloop timeout
cancellations not to find the timeout. Fix this by using the obj_desc
as the timeout context data.
Instead of sending PropertiesChanged signals for each changed
property separately, mark properties as changed and send aggregated
PropertiesChanged signals for each interface in each object.
Aggregated PropertiesChanged signal is sent
- for all object after responding on DBus call
- for specified object after manual call to
wpa_dbus_flush_object_changed_properties() function
- for each object separately after short timeout (currently 5 ms)
which starts when first property in object is marked changed
The actual supplicant state is exposed via a property on the interface
object. So having a separate signal StateChanged for notifying about
changes is a bad idea. The standard PropertiesChanged signal should be
used for this.
The advantage of StateChanged signal was that it includes the previous
state, but not even NetworkManager is making use of this. And tracking
the old state via the property and this signal is easily possible anyway.
Instead of using some magic integer values that really only mean
something to WPA internal code, just use simple strings. Possible
values are "msgdump", "debug", "info", "warning" and "error" which
map directly to WPA debugging support.
The three existing enums were already depending on using the same
values in couple of places and it is just simpler to standardize on
one of these to avoid need for mapping between different enums for
the exact same thing.
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.
This fits better in wpa_supplicant/scan.c. Couple of remaining
scan_helpers.c functions are currently used in driver wrappers,
but they can likely be removed in the future.
This adds new commands and events for allowing off-channel Action
frame exchanges to be requested. This functionality is not yet used
and is only fully supported by driver_test.c at this point.
driver_nl80211.c has support for the remain-on-channel commands, but
the Action frame TX/RX part is still pending review for the kernel
code and as such, is not yet included here.
This adds placeholder code for allowing the virtual interfaces to be
pre-allocated a MAC address before the interface type is known with
drivers that do not handle interface type changes.
Get rid of wpa_supplicant_sta_rx() and add a new driver event that is
marked to be used only with driver_test.c. In addition, remove this
functionality from privsep wrapper. This is only use for client mode
MLME testing with driver_test.c.
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).
There is no need to duplicate the method/signal/property arrays that
were registered for objects. The registration was using static arrays
on methods/signals/properties in all places and we can as well use
those throughout without having to allocate memory and copy all the
entries for every object. This reduces number of allocations and
amount of unnecessary code quite a bit.
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.
