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* mac80211: fix crash with P2P Device returning action framesJohannes Berg2013-03-11
| | | | | | | | | | | | If a P2P Device interface receives an unhandled action frame, we attempt to return it. This crashes because it doesn't have a channel context. Fix the crash by using status->band and properly mark the return frame as an off-channel frame. Reported-by: Ilan Peer <ilan.peer@intel.com> Reviewed-by: Ilan Peer <ilan.peer@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: clean up mesh codeJohannes Berg2013-02-15
| | | | | | | | | | | There's various code with strange indentation, questionable loop and locking constructs, etc. The bigger change is moving the "sdata" argument to the first argument of all functions, like all other mac80211 functions that have one. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: stop modifying HT SMPS capabilityJohannes Berg2013-02-15
| | | | | | | | | | Instead of modifying the HT SMPS capability field for stations, track the SMPS mode explicitly in a new field in the station struct and use it in the drivers that care about it. This simplifies the code using it. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: generate mesh probe responsesThomas Pedersen2013-02-15
| | | | | | | | | Mesh interfaces will now respond to any broadcast (or matching directed mesh) probe requests with a probe response. Signed-off-by: Thomas Pedersen <thomas@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: handle operating mode notif in beacon/assoc responseJohannes Berg2013-02-15
| | | | | | | | | | In beacons and association response frames an AP may include an operating mode notification element to advertise changes in the number of spatial streams it can receive. Handle this using the existing function that handles the action frame, but only handle NSS changes, not bandwidth changes which aren't allowed here. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: handle VHT operating mode notificationJohannes Berg2013-02-15
| | | | | | | | Handle the operating mode notification action frame. When the supported streams or the bandwidth change let the driver and rate control algorithm know. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: stop toggling IEEE80211_HT_CAP_SUP_WIDTH_20_40Johannes Berg2013-02-15
| | | | | | | | | | | | | | | | | | | | | | | | | For VHT, many more bandwidth changes are possible. As a first step, stop toggling the IEEE80211_HT_CAP_SUP_WIDTH_20_40 flag in the HT capabilities and instead introduce a bandwidth field indicating the currently usable bandwidth to transmit to the station. Of course, make all drivers use it. To achieve this, make ieee80211_ht_cap_ie_to_sta_ht_cap() get the station as an argument, rather than the new capabilities, so it can set up the new bandwidth field. If the station is a VHT station and VHT bandwidth is in use, also set the bandwidth accordingly. Doing this allows us to get rid of the supports_40mhz flag as the HT capabilities now reflect the true capability instead of the current setting. While at it, also fix ieee80211_ht_cap_ie_to_sta_ht_cap() to not ignore HT cap overrides when MCS TX isn't supported (not that it really happens...) Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: protect rx-path with spinlockChristian Lamparter2013-02-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the problem which was discussed in "mac80211: Fix PN corruption in case of multiple virtual interface" [1]. Amit Shakya reported a serious issue with my patch: mac80211: serialize rx path workers" [2]: In case, ieee80211_rx_handlers processing is going on for skbs received on one vif and at the same time, rx aggregation reorder timer expires on another vif then sta_rx_agg_reorder_timer_expired is invoked and it will push skbs into the single queue (local->rx_skb_queue). ieee80211_rx_handlers in the while loop assumes that the skbs are for the same sdata and sta. This assumption doesn't hold good in this scenario and the PN gets corrupted by PN received in other vif's skb, causing traffic to stop due to PN mismatch." [1] Message-Id: http://mid.gmane.org/201302041844.44436.chunkeey@googlemail.com [2] Commit-Id: 24a8fdad35835e8d71f7 Reported-by: Amit Shakya <amit.shakya@stericsson.com> Signed-off-by: Christian Lamparter <chunkeey@googlemail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: mesh power save basicsMarco Porsch2013-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add routines to - maintain a PS mode for each peer and a non-peer PS mode - indicate own PS mode in transmitted frames - track neighbor STAs power modes - buffer frames when neighbors are in PS mode - add TIM and Awake Window IE to beacons - release frames in Mesh Peer Service Periods Add local_pm to sta_info to represent the link-specific power mode at this station towards the remote station. When a peer link is established, use the default power mode stored in mesh config. Update the PS status if the peering status of a neighbor changes. Maintain a mesh power mode for non-peer mesh STAs. Set the non-peer power mode to active mode during peering. Authenticated mesh peering is currently not working when either node is configured to be in power save mode. Indicate the current power mode in transmitted frames. Use QoS Nulls to indicate mesh power mode transitions. For performance reasons, calls to the function setting the frame flags are placed in HWMP routing routines, as there the STA pointer is already available. Add peer_pm to sta_info to represent the peer's link-specific power mode towards the local station. Add nonpeer_pm to represent the peer's power mode towards all non-peer stations. Track power modes based on received frames. Add the ps_data structure to ieee80211_if_mesh (for TIM map, PS neighbor counter and group-addressed frame buffer). Set WLAN_STA_PS flag for STA in PS mode to use the unicast frame buffering routines in the tx path. Update num_sta_ps to buffer and release group-addressed frames after DTIM beacons. Announce the awake window duration in beacons if in light or deep sleep mode towards any peer or non-peer. Create a TIM IE similarly to AP mode and add it to mesh beacons. Parse received Awake Window IEs and check TIM IEs for buffered frames. Release frames towards peers in mesh Peer Service Periods. Use the corresponding trigger frames and monitor the MPSP status. Append a QoS Null as trigger frame if neccessary to properly end the MPSP. Currently, in HT channels MPSPs behave imperfectly and show large delay spikes and frame losses. Signed-off-by: Marco Porsch <marco@cozybit.com> Signed-off-by: Ivan Bezyazychnyy <ivan.bezyazychnyy@gmail.com> Signed-off-by: Mike Krinkin <krinkin.m.u@gmail.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: support HT notify channel width actionJohannes Berg2013-01-03
| | | | | | | | Support the HT notify channel width action frame to update the rate scaling about the bandwidth the peer can receive in. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: don't drop mesh peering frames from unknown STAMarco Porsch2012-12-06
| | | | | | | | | | | | | | | | | | Previously, mesh peering frames from a STA without a station entry were being dropped. Mesh Peering Open and other frames (WLAN_CATEGORY_SELF_PROTECTED) are valid mesh peering frames even if received from a yet unknown station; the STA entry will be created in mesh_peer_init later. The problem didn't occur previously since both STAs receive each other's beacons which created the STA entry. However, this causes an unnecessary delay and beacons might not be received if either node is in PS mode. Signed-off-by: Marco Porsch <marco.porsch@etit.tu-chemnitz.de> [reword commit log a bit] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: skip radiotap space calculation if no monitor existsHelmut Schaa2012-12-05
| | | | | | | | | | The radiotap header length "needed_headroom" is only required if we're sending the skb to a monitor interface. Hence, move the calculation a bit later so the calculation can be skipped if no monitor interface is present. Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: fix potential NULL dereferenceDan Carpenter2012-11-28
| | | | | | | | | Smatch complains that we could dereference skb later in the function. It's probably unlikely, but we may as well return here and avoid it. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> [change summary] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: support (partial) VHT radiotap informationJohannes Berg2012-11-27
| | | | | | | Add some information that we have about VHT to radiotap. This at least lets one see the MCS and NSS information. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: support drivers reporting VHT RXJohannes Berg2012-11-26
| | | | | | | Add support to mac80211 for having drivers report received VHT MCS information. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: in ADHOC don't update last_rx if sta is not authorizedAntonio Quartulli2012-11-26
| | | | | | | | | | | | | It does not make sense to keep a station alive if it is not authorised at all. If IBSS/RSN is used it could also be the case that something went wrong during the keys exchange and the stations ended up in a not recoverable state. By not updating last_rx we are giving the station a chance to be deleted and to start the key exchange once again from scratch. Signed-off-by: Antonio Quartulli <antonio@open-mesh.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: fix radiotap vendor area skippingJohannes Berg2012-11-23
| | | | | | | | | | | The radiotap vendor area in the skb head must be skipped and accounted for in a few functions until it is removed. I missed this in my patch, so a few places use this data as though it was the 802.11 header, fix these places. Reported-by: Wojciech Dubowik <Wojciech.Dubowik@neratec.com> Tested-by: Wojciech Dubowik <Wojciech.Dubowik@neratec.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: support radiotap vendor namespace RX dataJohannes Berg2012-11-19
| | | | | | | | | | | | | | | | In some cases, in particular for experimentation, it can be useful to be able to add vendor namespace data to received frames in addition to the normal radiotap data. Allow doing this through mac80211 by adding fields to the RX status descriptor that describe the data while the data itself is prepended to the frame. Also add some example code to hwsim, but don't enable it because it doesn't use a proper OUI identifier. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: introduce IEEE80211_NUM_TIDS and use itJohannes Berg2012-11-19
| | | | | | | | | Introduce IEEE80211_NUM_TIDS in the generic 802.11 header file and use it in place of STA_TID_NUM and NUM_RX_DATA_QUEUES which are both really the number of TIDs. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: support RX_FLAG_MACTIME_ENDThomas Pedersen2012-11-13
| | | | | | | | | | | Allow drivers to indicate their mactime is at RX completion and adjust for this in mac80211. Also rename the existing RX_FLAG_MACTIME_MPDU to RX_FLAG_MACTIME_START to clarify its intent. Based on similar code by Johannes Berg. Signed-off-by: Thomas Pedersen <thomas@cozybit.com> [fix docs, atheros drivers] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* cfg80211: allow registering more than one beacon listenerBen Greear2012-11-05
| | | | | | | | | | | | | | | | | | | | | The commit: commit 5e760230e42cf759bd923457ca2753aacf2e656e Author: Johannes Berg <johannes.berg@intel.com> Date: Fri Nov 4 11:18:17 2011 +0100 cfg80211: allow registering to beacons allowed only a single process to register for beacon events per wiphy. This breaks cases where a user may want two or more VIFs on a wiphy and run a seperate hostapd process on each vif. This patch allows multiple beacon listeners, fixing the regression. Signed-off-by: Ben Greear <greearb@candelatech.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* Merge remote-tracking branch 'wireless-next/master' into mac80211-nextJohannes Berg2012-10-30
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| * Merge branch 'master' of ↵John W. Linville2012-10-29
| |\ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless Conflicts: drivers/net/wireless/mwifiex/cfg80211.c
| | * mac80211: make sure data is accessible in EAPOL checkJohannes Berg2012-10-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code to allow EAPOL frames even when the station isn't yet marked associated needs to check that the incoming frame is long enough and due to paged RX it also can't assume skb->data contains the right data, it must use skb_copy_bits(). Fix this to avoid using data that doesn't really exist. Cc: stable@vger.kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: verify that skb data is presentJohannes Berg2012-10-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A number of places in the mesh code don't check that the frame data is present and in the skb header when trying to access. Add those checks and the necessary pskb_may_pull() calls. This prevents accessing data that doesn't actually exist. To do this, export ieee80211_get_mesh_hdrlen() to be able to use it in mac80211. Cc: stable@vger.kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: check management frame header lengthJohannes Berg2012-10-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Due to pskb_may_pull() checking the skb length, all non-management frames are checked on input whether their 802.11 header is fully present. Also add that check for management frames and remove a check that is now duplicate. This prevents accessing skb data beyond the frame end. Cc: stable@vger.kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: don't inspect Sequence Control field on control framesJavier Cardona2012-10-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Per IEEE Std. 802.11-2012, Sec 8.2.4.4.1, the sequence Control field is not present in control frames. We noticed this problem when processing Block Ack Requests. Cc: stable@vger.kernel.org Signed-off-by: Javier Cardona <javier@cozybit.com> Signed-off-by: Javier Lopez <jlopex@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: Don't drop frames received with mesh ttl == 1Javier Cardona2012-10-25
| | | | | | | | | | | | | | | | | | | | | | | | Prior this fix, those frames were not received, nor forwarded. Fix this to receive and not forward. Signed-off-by: Javier Cardona <javier@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: Only process mesh config header on frames that RA_MATCHJavier Cardona2012-10-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Doing otherwise is wrong, and may wreak havoc on the mpp tables, specially if the frame is encrypted. Cc: stable@vger.kernel.org Reported-by: Chaoxing Lin <Chaoxing.Lin@ultra-3eti.com> Signed-off-by: Javier Cardona <javier@cozybit.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | | mac80211: a few formatting fixesJohannes Berg2012-10-26
|/ / | | | | | | | | | | Fix a few code formatting issues in the RX code. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: make client powersave independent of interface typeMarco Porsch2012-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch prepares mac80211 for a later implementation of mesh or ad-hoc powersave clients. The structures related to powersave (buffer, TIM map, counters) are moved from the AP-specific interface structure to a generic structure that can be embedded into any interface type. The functions related to powersave are prepared to allow easy extension with different interface types. For example with: + } else if (sta->sdata->vif.type == NL80211_IFTYPE_MESH_POINT) { + ps = &sdata->u.mesh.ps; Some references to the AP's beacon structure are removed where they were obviously not used. The patch compiles without warning and has been briefly tested as AP interface with one client in PS mode. Signed-off-by: Marco Porsch <marco.porsch@etit.tu-chemnitz.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: remove some unused codeJohannes Berg2012-10-18
|/ | | | | | | | | | There are a number of unused variables that gcc pointed out (when building with W=1) as well as some conditions that can never be true due to the datatypes used: unsigned values can't be less than zero. Remove this code. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: don't use kerneldoc for ieee80211_add_rx_radiotap_headerJohannes Berg2012-09-05
| | | | | | | Doing so creates warnings, but the function is internal and not part of the 802.11 docbooks, so it from kerneldoc. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: use RX status band instead of current bandJohannes Berg2012-08-20
| | | | | | | | | | Even for single-channel devices it is possible that we switch the channel temporarily (e.g. for scanning) but while doing so process a received frame that was still received on the old channel, so checking the current band is racy. Use the band from status instead. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: support P2P Device abstractionJohannes Berg2012-08-20
| | | | | | | | | | After cfg80211 got a P2P Device abstraction, add support to mac80211. Whether it really is supported or not will depend on whether or not the driver has support for it, but mac80211 needs to change to be able to support drivers that need a P2P Device. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* mac80211: support A-MPDU status reportingJohannes Berg2012-08-20
| | | | | | | | Support getting A-MPDU status information from the drivers and reporting it to userspace via radiotap in the standard fields. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* Merge branch 'master' of ↵John W. Linville2012-07-20
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
| * Merge branch 'for-john' of ↵John W. Linville2012-07-12
| |\ | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next Conflicts: drivers/net/wireless/iwmc3200wifi/cfg80211.c drivers/net/wireless/mwifiex/cfg80211.c
| | * mac80211: redesign scan RXJohannes Berg2012-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Scan receive is rather inefficient when there are multiple virtual interfaces. We iterate all of the virtual interfaces and then notify cfg80211 about each beacon many times. Redesign scan RX to happen before everything else. Then we can also get rid of IEEE80211_RX_IN_SCAN since we don't have to accept frames into the RX handlers for scanning or scheduled scanning any more. Overall, this simplifies the code. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: track scheduled scan virtual interfaceJohannes Berg2012-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of tracking whether or not we're in a scheduled scan, track the virtual interface (sdata) in an RCU-protected pointer to make it usable from RX to check the MAC address. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * cfg80211: use wdev in mgmt-tx/ROC APIsJohannes Berg2012-07-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The management frame and remain-on-channel APIs will be needed in the P2P device abstraction, so move them over to the new wdev-based APIs. Userspace can still use both the interface index and wdev identifier for them so it's backward compatible, but for the P2P Device wdev it will be able to use the wdev identifier only. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| * | Merge branch 'master' of ↵John W. Linville2012-07-09
| |\ \ | | |/ | |/| | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless Conflicts: net/mac80211/mlme.c
* | | net: Fix (nearly-)kernel-doc comments for various functionsBen Hutchings2012-07-11
| | | | | | | | | | | | | | | | | | | | | | | | Fix incorrect start markers, wrapped summary lines, missing section breaks, incorrect separators, and some name mismatches. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Merge branch 'master' of ↵John W. Linville2012-06-29
|\ \ \ | |/ / |/| / | |/ git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
| * mac80211: correct behaviour on unrecognised action framesJohannes Berg2012-06-27
| | | | | | | | | | | | | | | | | | | | | | | | | | When receiving an "individually addressed" action frame, the receiver is required to return it to the sender. mac80211 gets this wrong as it also returns group addressed (mcast) frames to the sender. Fix this and update the reference to the new 802.11 standards version since things were shuffled around significantly. Cc: stable@kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
* | mac80211: clean up debuggingJohannes Berg2012-06-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are a few things that make the logging and debugging in mac80211 less useful than it should be right now: * a lot of messages should be pr_info, not pr_debug * wholesale use of pr_debug makes it require *both* Kconfig and dynamic configuration * there are still a lot of ifdefs * the style is very inconsistent, sometimes the sdata->name is printed in front Clean up everything, introducing new macros and separating out the station MLME debugging into a new Kconfig symbol. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: pass sdata to some RX functionsJohannes Berg2012-06-22
| | | | | | | | | | | | | | | | For better debugging, we would like to have the sdata pointer available later, so pass it into these functions. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: save wmm_acm per sdataYoni Divinsky2012-06-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Save and configure the wmm_acm per sdata, rather than per hardware. If wmm_acm is saved per hardware when running two interfaces simultaneously on the same hardware one interface's wmm policy will be affected by the other interface. Signed-off-by: Yoni Divinsky <yoni.divinsky@ti.com> Signed-off-by: Luciano Coelho <coelho@ti.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | mac80211: stop Rx during HW reconfigArik Nemtsov2012-06-18
| | | | | | | | | | | | | | | | | | | | While HW reconfig is in progress, drop all incoming Rx. This prevents incoming packets from changing the internal state of the driver or calling callbacks of the low level driver while it is in inconsistent state. Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | net: mac80211: Convert printk(KERN_DEBUG to pr_debugJoe Perches2012-06-05
|/ | | | | | | | | Standardize the debugging to be able to use dynamic_debug. Coalesce formats, align arguments. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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