Commit graph

194 commits

Author SHA1 Message Date
Jouni Malinen
07e0117d21 FILS: Mark connection fully authorized after FILS Association (AP)
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-10-26 00:20:04 +03:00
Jouni Malinen
e73ffa0925 FILS: Add Association Response frame elements and encrypt them (AP)
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-10-25 20:42:52 +03:00
Jouni Malinen
78815f3dde FILS: Decrypt Association Request elements and check Key-Auth (AP)
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-10-25 20:42:52 +03:00
Jouni Malinen
c4fd6d8aa8 FILS: Process FILS Authentication frame (AP)
This implements processing of FILS Authentication frame for FILS shared
key authentication with ERP and PMKSA caching.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-10-22 23:27:01 +03:00
Jouni Malinen
ffb62f2272 FILS: Add a helper function for status code conversion
This will allow the existing code to be reused for FILS needs.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-10-22 23:27:01 +03:00
Nishant Chaprana
746e5c2565 Fix spelling mistakes in number of comments
Signed-off-by: Nishant Chaprana <n.chaprana@samsung.com>
2016-09-30 22:45:03 +03:00
Denton Gentry
04059ab844 Passive Client Taxonomy
Implement the signature mechanism described in the paper
"Passive Taxonomy of Wifi Clients using MLME Frame Contents"
published by Denton Gentry and Avery Pennarun.

http://research.google.com/pubs/pub45429.html
https://arxiv.org/abs/1608.01725

This involves:
1. Add a CONFIG_TAXONOMY compile option. Enabling taxonomy incurs
   a memory overhead of up to several kilobytes per associated
   station.
2. If enabled, store the Probe Request and (Re)Associate Request frame in
   struct sta_info.
3. Implement code to extract the ID of each Information Element,
   plus selected fields and bitmasks from certain IEs, into a
   descriptive text string. This is done in a new source file,
   src/ap/taxonomy.c.
4. Implement a "signature qq:rr:ss:tt:uu:vv" command
   in hostapd_cli to retrieve the signature.

Signatures take the form of a text string. For example, a signature
for the Nexus 5X is:
  wifi4|probe:0,1,127,45,191,htcap:01ef,htagg:03,htmcs:0000ffff,vhtcap:338061b2,
  vhtrxmcs:030cfffa,vhttxmcs:030cfffa,extcap:00000a0201000040|assoc:0,1,48,45,
  221(0050f2,2),191,127,htcap:01ef,htagg:03,htmcs:0000ffff,vhtcap:339071b2,
  vhtrxmcs:030cfffa,vhttxmcs:030cfffa,extcap:0000000000000040

Signed-off-by: dgentry@google.com (Denton Gentry)
Signed-off-by: denny@geekhold.com (Denton Gentry)
Signed-off-by: rofrankel@google.com (Richard Frankel)
Signed-off-by: richard@frankel.tv (Richard Frankel)
2016-09-22 00:45:24 +03:00
Tamizh chelvam
fc72a48a63 hostapd: Use stations nsts capability in (Re)Association Response frame
Some deployed stations incorrectly consider nsts capability in
(Re)Association Response frame as required capability instead of maximum
capability and if it is greater than station's capability then beamform
will not happen in uplink traffic.

This commit adds support for an optional workaround to use station's
nsts capability in (Re)Association Response frame if the station's nsts
is less than AP by using the use_sta_nsts=1 configuration parameter.
This configuration is introduced in this commit and it is disabled by
default.

Signed-off-by: Tamizh chelvam <c_traja@qti.qualcomm.com>
2016-09-05 21:14:40 +03:00
Johannes Berg
81372e347a ap: Use is_multicast_ether_addr() more
Various checks should use is_multicast_ether_addr() instead
of hardcoding the equivalent, change it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-08-17 13:43:31 +03:00
Johannes Berg
842c5af5d3 ap: Use is_broadcast_ether_addr()
There's no need to have a separate variable and open-code a more
complicated version of this, just use is_broadcast_ether_addr().

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2016-08-06 16:51:48 +03:00
Jouni Malinen
d735811329 tests: Add TEST_FAIL() to hostapd_get_aid()
This allows additional testing coverage for AID unavailability cases.

Signed-off-by: Jouni Malinen <j@w1.fi>
2016-06-28 20:44:55 +03:00
Jouni Malinen
468b7b12a6 Fix hostapd_sta_add() call to use NULL as the pointer instead of 0
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-06-23 13:14:17 +03:00
Jouni Malinen
dad0129227 mesh: Support simple SAE group negotiation case
This allows the simplest case of SAE group negotiation to occur by
selecting the next available group if the peer STA indicates the
previous one was not supported. This is not yet sufficient to cover all
cases, e.g., when both STAs need to change their groups, but at least
some cases are no covered.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-05-30 21:14:08 +03:00
Bala Krishna Bhamidipati
a911227061 Add assocresp_elements parameter for hostapd
This new parameter allows hostapd to add Vendor Specific elements into
(Re)Association Response frames similarly to the way vendor_elements
parameter can be used for Beacon and Probe Response frames.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-04-20 13:12:50 +03:00
David Spinadel
629e1804da hostapd: Save RM enabled capability of station
Save RM enabled capability element of an associating station if radio
measurement is supported in its capability field.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
2016-04-17 12:29:12 +03:00
David Spinadel
2572df34b2 hostapd: Handle Neighbor Report Request frame
Process Neighbor Report Request frame and send Neighbor Report Response
frame based on the configured neighbor report data.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
2016-04-17 12:29:07 +03:00
David Spinadel
010182120d hostapd: Extend the configuration of RRM capabilities
Extend the radio_measurements parameter to save all the supported
RRM capabilities as it's used in RM enabled capabilities element.

Make this parameter not directly configurable via config file (though,
keep the radio_measurements parameter for some time for backwards
compatibility). Instead, add a configuration option to enable neighbor
report via radio measurements. Other features can be added later as
well.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
2016-04-16 21:05:39 +03:00
Jouni Malinen
1854eeca19 Add POLL_STA command to check connectivity in AP mode
The hostapd "POLL_STA <addr>" control interface command can be used to
check whether an associated station ACKs a QoS Data frame. The received
ACK for such a frame is reported as an event message ("AP-STA-POLL-OK
<addr>").

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-04-09 00:30:49 +03:00
Ayala Beker
ae33239c55 AP: Pass station P2P PS capabilities info during station add/set
If a legacy client with no P2P PS support is trying to connect to
a P2P GO, the driver should know that, and change its PS behavior
accordingly.

Add a parameter to hostapd_sta_add_params() indicating if P2P PS is
supported by the station and pass this parameter to kernel with nl80211
driver when the station is added/set.

Signed-off-by: Ayala Beker <ayala.beker@intel.com>
2016-04-08 13:02:49 +03:00
Masashi Honma
9f2cf23e2e mesh: Add support for PMKSA caching
This patch add functionality of mesh SAE PMKSA caching. If the local STA
already has peer's PMKSA entry in the cache, skip SAE authentication and
start AMPE with the cached value.

If the peer does not support PMKSA caching or does not have the local
STA's PMKSA entry in the cache, AMPE will fail and the PMKSA cache entry
of the peer will be removed. Then STA retries with ordinary SAE
authentication.

If the peer does not support PMKSA caching and the local STA uses
no_auto_peer=1, the local STA can not retry SAE authentication because
NEW_PEER_CANDIDATE event cannot start SAE authentication when
no_auto_peer=1. So this patch extends MESH_PEER_ADD command to use
duration(sec). Throughout the duration, the local STA can start SAE
authentication triggered by NEW_PEER_CANDIDATE even though
no_auto_peer=1.

This commit requires commit 70c93963ed
('SAE: Fix PMKID calculation for PMKSA cache'). Without that commit,
chosen PMK comparison will fail.

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>
2016-03-20 17:56:38 +02:00
Eliad Peller
f2accfe708 AP: Save EAPOL received before Association Response ACK
There is a race condition in which AP might receive the EAPOL-Start
frame (from the just-associated station) before the TX completion of the
Association Response frame. This in turn will cause the EAPOL-Start
frame to get dropped, and potentially failing the connection.

Solve this by saving EAPOL frames from authenticated-but-not-associated
stations, and handling them during the Association Response frame TX
completion processing.

Signed-off-by: Eliad Peller <eliad@wizery.com>
2016-03-06 17:08:12 +02:00
Jouni Malinen
adf0478e8e AP: Store STA supported operating classes information
This makes hostapd track Supported Operating Classes information from
the associated STAs. The stored information is available through the STA
control interface command (supp_op_classes row) as a hexdump of the
Supported Operating Classes element starting from the Length field. This
information can be used as input to BSS transition management and
channel switching decisions.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-02-24 12:20:31 +02:00
Dedy Lansky
077dcfb8c4 AP: Debug print management frame TX result
Inside management frame TX status callback, print the TX result where it
was missing. This is useful for debugging management frame drops.

Signed-off-by: Dedy Lansky <qca_dlansky@qca.qualcomm.com>
2016-02-22 21:51:19 +02:00
Jouni Malinen
4c572281ed MBO: Mandate use of PMF for WPA2+MBO association (AP)
If WPA2 and MBO are enabled, PMF needs to be enabled in hostapd
configuration. If PMF is optional in the configuration, an MBO STA is
required to negotiate use of PMF.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-02-22 19:53:05 +02:00
Jouni Malinen
6332aaf3b2 MBO: Track STA cellular data capability from association request
This makes hostapd parse the MBO attribute in (Re)Association Request
frame and track the cellular data capability (mbo_cell_capa=<val> in STA
control interface command).

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2016-02-22 19:53:05 +02:00
Avraham Stern
fb9a1c3e28 hostapd: Add MBO IE to Beacon, Probe Response, Association Response
Add MBO IE with AP capability attribute to Beacon, Probe Response, and
(Re)Association Response frames to indicate the AP supports MBO.

Add option to add Association Disallowed attribute to Beacon, Probe
Response, and (Re)Association Response frames. Usage:

SET mbo_assoc_disallow <reason code>

Valid reason code values are between 1-5. Setting the reason code to
0 will remove the Association Disallowed attribute from the MBO IE
and will allow new associations.

MBO functionality is enabled by setting "mbo=1" in the config file.

Signed-off-by: Avraham Stern <avraham.stern@intel.com>
2016-02-22 19:53:04 +02:00
Andrei Otcheretianski
3f81ac0762 AP: Set STA assoc flag in the driver before sending Assoc Resp frame
Previously, stations were added to the driver only after the
(Re)Association Response frame was acked. In the time period between the
station has acked the (Re)Association Response frame and the time the
station was added to the kernel, the station can already start sending
Data frames, which will be dropped by the hardware/driver. In addition
to the data loss, the driver may ignore NDPs with PM bit set from this
STA.

Fix this by setting/adding the STA with associated flag set to the
driver before the AP sends the (Re)Association Response frame with
status success. If the (Re)Association Response frame wasn't acked,
remove the station from the driver.

Note that setting a station to associated state before the non-AP
station acknowledges the (Re)Association Response frame is not compliant
with the IEEE 802.11 standard that specifically states that a non-AP
station should transition to authenticated/associated state only after
it acknowledged the (Re)Association Response frame. However, this is a
justifiable simplification to work around the issue described above since

1. The station will be removed in case it does not acknowledge the
   (Re)Association Response frame.
2. All Data frames would be dropped until the station is set to
   authorized state and there are no known issues with processing the
   other Class 3 frames during the short window before the
   acknowledgement is seen.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
2016-02-20 18:25:13 +02:00
Ayala Beker
bb598c3bdd AP: Add support for full station state
Add support for drivers that support full AP client state, i.e., can
handle adding stations that are not associated yet. For such drivers,
add a station after processing the authentication request, instead of
adding it in the association response callback.

Doing so is beneficial in cases where the driver cannot handle the add
station request, in which case it is useless to perform the complete
connection establishment.

Signed-off-by: Ayala Beker <ayala.beker@intel.com>
2016-02-20 18:25:13 +02:00
Nick Lowe
f441e5af77 Use os_get_random() for Shared Key authentication challenge
Do not use the system clock or os_random() that uses a low quality PRNG
as part of the pseudo-random challenge in auth_shared_key(). The
construction can be improved upon by replacing it with a call to
os_get_random(), which uses a high quality PRNG.

Signed-off-by: Nick Lowe <nick.lowe@lugatech.com>
2016-02-19 18:44:40 +02:00
Masashi Honma
09d96de09e mesh: Drop Authentication frames from BLOCKED STA
Previously, only mesh Action frames from BLOCKED STA were dropped.
Extend that to drop Authentication frames as well.

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>
2016-02-18 21:27:06 +02:00
Masashi Honma
70c93963ed SAE: Fix PMKID calculation for PMKSA cache
The SAE PMKID is calculated with IEEE Std 802.11-2012 11.3.5.4, but the
PMKID was re-calculated with 11.6.1.3 and saved into PMKSA cache. Fix
this to save the PMKID calculated with 11.3.5.4 into the PMKSA cache.

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>
2016-02-18 21:07:47 +02:00
Michael Braun
8be640b780 VLAN: Add per-STA vif option
This allows the stations to be assigned to their own vif. It does not
need dynamic_vlan to be set. Make hostapd call ap_sta_set_vlan even if
!vlan_desc.notempty, so vlan_id can be assigned regardless.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
2016-02-17 11:46:13 +02:00
Michael Braun
8e44c192da radius: Add tagged VLAN parsing
1. Add tagged VLAN to struct vlan_description
    (compile limited number of tagged VLANs per description)
    For k tagged VLANs, the first k entries in vlan_description.tagged
    are used. They are sorted in ascending order. All other entries are
    zero. This way os_memcmp() can find identical configurations.
2. Let tagged VLANs be parsed from RADIUS Access-Accept
3. Print VLAN %d+ with %d=untagged VID if tagged VLANs are set
4. Select an unused vlan_id > 4096 for new tagged VLAN configurations
5. Add EGRESS_VLAN RADIUS attribute parsing also for untagged VLANs

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
2016-02-17 11:46:13 +02:00
Michael Braun
1889af2e0f VLAN: Separate station grouping and uplink configuration
Separate uplink configuration (IEEE 802.1q VID) and grouping of stations
into AP_VLAN interfaces.

The int vlan_id will continue to identify the AP_VLAN interface the
station should be assigned to. Each AP_VLAN interface corresponds to an
instance of struct hostapd_vlan that is uniquely identified by int
vlan_id within an BSS.

New: Each station and struct hostapd_vlan holds a struct
vlan_description vlan_desc member that describes the uplink
configuration requested. Currently this is just an int untagged IEEE
802.1q VID, but can be extended to tagged VLANs and other settings
easily.

When the station was about to be assigned its vlan_id, vlan_desc and
vlan_id will now be set simultaneously by ap_sta_set_vlan(). So
sta->vlan_id can still be tested for whether the station needs to be
moved to an AP_VLAN interface.

To ease addition of tagged VLAN support, a member notempty is added to
struct vlan_description. Is is set to 1 if an untagged or tagged VLAN
assignment is requested and needs to be validated. The inverted form
allows os_zalloc() to initialize an empty description.

Though not depended on by the code, vlan_id assignment ensures:
  * vlan_id = 0 will continue to mean no AP_VLAN interface
  * vlan_id < 4096 will continue to mean vlan_id = untagged vlan id
    with no per_sta_vif and no extra tagged vlan.
  * vlan_id > 4096 will be used for per_sta_vif and/or tagged vlans.

This way struct wpa_group and drivers API do not need to be changed in
order to implement tagged VLANs or per_sta_vif support.

DYNAMIC_VLAN_* will refer to (struct vlan_description).notempty only,
thus grouping of the stations for per_sta_vif can be used with
DYNAMIC_VLAN_DISABLED, but not with CONFIG_NO_VLAN, as struct
hostapd_vlan is still used to manage AP_VLAN interfaces.

MAX_VLAN_ID will be checked in hostapd_vlan_valid and during setup of
VLAN interfaces and refer to IEEE 802.1q VID. VLAN_ID_WILDCARD will
continue to refer to int vlan_id.

Renaming vlan_id to vlan_desc when type changed from int to struct
vlan_description was avoided when vlan_id was also used in a way that
did not depend on its type (for example, when passed to another
function).

Output of "VLAN ID %d" continues to refer to int vlan_id, while "VLAN
%d" will refer to untagged IEEE 802.1q VID.

Signed-off-by: Michael Braun <michael-dev@fami-braun.de>
2016-02-17 11:46:11 +02:00
Jouni Malinen
4f6cd3f426 Fix wpa_supplicant AP mode P2P IE handling if P2P is disabled
If P2P support is included in wpa_supplicant build (CONFIG_P2P=y), but
P2P functionality is explicitly disabled (e.g., "P2P_SET disabled 1"),
couple of AP management frame processing steps did not check against
hapd->p2p_group being NULL and could end up dereferencing a NULL pointer
if a Probe Request frame or (Re)Association Request frame was received
with a P2P IE in it. Fix this by skipping these steps if hapd->p2p_group
is NULL.

Signed-off-by: Jouni Malinen <j@w1.fi>
2016-01-01 17:12:43 +02:00
Jouni Malinen
d7c3347f59 HS 2.0: Postpone WNM-Notification sending by 100 ms
This makes it somewhat easier for the station to be able to receive and
process the encrypted WNM-Notification frames that the AP previously
sentt immediately after receiving EAPOL-Key msg 4/4. While the station
is supposed to have the TK configured for receive before sending out
EAPOL-Key msg 4/4, not many actual implementations do that. As such,
there is a race condition in being able to configure the key at the
station and the AP sending out the first encrypted frame after EAPOL-Key
4/4. The extra 100 ms time here makes it more likely for the station to
have managed to configure the key in time.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2015-12-31 21:46:08 +02:00
Bob Copeland
681753f23c mesh: Generate proper AID for peer
IEEE Std 802.11-2012 13.3.1 states that the AID should be generated on
the local node for each peer. Previously, we were using the peer link ID
(generated by the peer) which may not be unique among all peers. Correct
this by reusing the AP AID generation code.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
2015-10-06 01:27:29 +03:00
Andrei Otcheretianski
98b0508121 P2P: Implement P2P_GO_FREQ_MOVE_SCM_ECSA policy
Add new GO frequency move policy. The P2P_GO_FREQ_MOVE_SCM_ECSA prefers
SCM if all the clients advertise eCSA support and the candidate
frequency is one of the group common frequencies.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
2015-10-03 20:30:40 +03:00
Ashok Raj Nagarajan
28ffd21c07 Do not copy STA VHT capabilities if VHT is not enabled for AP
Previously, station's VHT information elements were copied and passed
regardless of the AP's VHT configuration. As a result, AP with VHT
disabled in configuration could have ended up transmitting packets in
VHT rates though AP is not advertising VHT support. Fix this by copying
the station's VHT capabilities only when AP supports VHT (both hardware
and configuration).

Signed-off-by: Ashok Raj Nagarajan <arnagara@qti.qualcomm.com>
2015-09-23 12:09:35 +03:00
Jouni Malinen
b308a304d4 Add station tracking based on other management frame subtypes
This extends the previous tracking design to add a station entry based
on other management frames than Probe Request frames. For example, this
covers a case where the station is using passive scanning.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-09-05 19:38:06 +03:00
Jouni Malinen
0e2412d086 Add option to reject authentication on 2.4 GHz from dualband STA
The new no_auth_if_seen_on=<ifname> parameter can now be used to
configure hostapd to reject authentication from a station that was seen
on another radio.

This can be used with enabled track_sta_max_num configuration on another
interface controlled by the same hostapd process to reject
authentication attempts from a station that has been detected to be
capable of operating on another band, e.g., to try to reduce likelihood
of the station selecting a 2.4 GHz BSS when the AP operates both a 2.4
GHz and 5 GHz BSS concurrently.

Note: Enabling this can cause connectivity issues and increase latency for
connecting with the AP.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-09-05 19:11:02 +03:00
Masashi Honma
ecd40fef74 mesh: Fix mesh SAE auth on low spec devices
The mesh SAE auth often fails with master branch. By bisect I found
commit eb5fee0bf5 ('SAE: Add side-channel
protection to PWE derivation with ECC') causes this issue. This does not
mean the commit has a bug. This is just a CPU resource issue.

After the commit, sae_derive_pwe_ecc() spends 101(msec) on my PC (Intel
Atom N270 1.6GHz). But dot11RSNASAERetransPeriod is 40(msec). So
auth_sae_retransmit_timer() is always called and it can causes
continuous frame exchanges. Before the commit, it was 23(msec).

On the IEEE 802.11 spec, the default value of dot11RSNASAERetransPeriod
is defined as 40(msec). But it looks short because generally mesh
functionality will be used on low spec devices. Indeed Raspberry Pi B+
(ARM ARM1176JZF-S 700MHz) requires 287(msec) for new
sae_derive_pwe_ecc().

So this patch makes the default to 1000(msec) and makes it configurable.

This issue does not occur on infrastructure SAE because the
dot11RSNASAERetransPeriod is not used on it.

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>
2015-08-02 21:37:10 +03:00
Jouni Malinen
7cb53ded11 Add build option to remove all internal RC4 uses
The new CONFIG_NO_RC4=y build option can be used to remove all internal
hostapd and wpa_supplicant uses of RC4. It should be noted that external
uses (e.g., within a TLS library) do not get disabled when doing this.

This removes capability of supporting WPA/TKIP, dynamic WEP keys with
IEEE 802.1X, WEP shared key authentication, and MSCHAPv2 password
changes.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-08-02 16:52:56 +03:00
Jouni Malinen
94edea89fd FST: Print reason for ignoring FST Action frame in debug log
This makes it easier to understand why some frames are not processed.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-07-25 23:20:33 +03:00
Anton Nayshtut
347827ff6e FST: Add FST IEs into AP mode management frames
This adds the FST IEs received from the FST module into Beacon, Probe
Response, and (Re)Association Response frames.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2015-07-16 18:26:15 +03:00
Anton Nayshtut
037378ff31 FST: Send FST Action frames to AP mode processing
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2015-07-16 18:26:15 +03:00
Anton Nayshtut
ae667c0827 FST: Store MB IEs from (Re)Association Request
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
2015-07-16 18:26:15 +03:00
Jouni Malinen
6a58444d27 SAE: Verify that own/peer commit-scalar and COMMIT-ELEMENT are different
This check explicitly for reflection attack and stops authentication
immediately if that is detected instead of continuing to the following
4-way handshake that would fail due to the attacker not knowing the key
from the SAE exchange.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-06-23 23:10:36 +03:00
Jouni Malinen
fd66aa63f4 Check Public Action length explicitly before reading Action Code
In theory, the previous version could have resulted in reading one byte
beyond the end of the management frame RX buffer if the local driver
were to deliver a truncated Public Action frame for processing. In
practice, this did not seem to happen with mac80211-based drivers and
even if it were, the extra octet would be an uninitialized value in a
buffer rather than read beyond the end of the buffer.

Signed-off-by: Jouni Malinen <j@w1.fi>
2015-05-03 16:33:08 +03:00
Masashi Honma
fabc6dd8c4 mesh: Retransmit the last Commit Message in the Committed state
Previously, mesh state machine transmits updated Commit Message when
receiving a Confirm Message in Committed state. According to the
standard, it should (re)send the latest Commit Message previously sent.

IEEE Std 802.11-2012, 11.3.8.6.4 Protocol instance behavior - Committed
state:
"Upon receipt of a Con event, ... If Sync is not greater than
dot11RSNASAESync, the protocol instance shall increment Sync, transmit
the last Commit Message sent to the peer, and set the t0
(retransmission) timer."

Signed-off-by: Masashi Honma <masashi.honma@gmail.com>
2015-04-25 15:36:41 +03:00