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path: root/net/mac80211/util.c
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2013-02-15mac80211: constify IE parsingJohannes Berg
Make all the parsed IE pointers const, and propagate the change to all the users etc. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-15mac80211: handle operating mode notif in beacon/assoc responseJohannes Berg
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>
2013-02-15mac80211: don't pick up WPA vendor IEJohannes Berg
There's no use for it, WPA is entirely handled in wpa_supplicant in userspace, so don't pick the IE. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-15mac80211: add radar detection command/eventSimon Wunderlich
Add command to trigger radar detection in the driver/FW. Once radar detection is started it should continuously monitor for radars as long as the channel active. If radar is detected usermode notified with 'radar detected' event. Scanning and remain on channel functionality must be disabled while doing radar detection/scanning, and vice versa. Based on original patch by Victor Goldenshtein <victorg@ti.com> Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-02-04mac80211: mesh power save basicsMarco Porsch
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>
2013-01-31mac80211: start auth/assoc timeout on frame statusJohannes Berg
When sending authentication/association frames they might take a bit of time to go out because we may have to synchronise with the AP, in particular in the case where it's really a P2P GO. In this case the 200ms fixed timeout could potentially be too short if the beacon interval is relatively large. For drivers that report TX status we can do better. Instead of starting the timeout directly, start it only when the frame status arrives. Since then the frame was out on the air, we can wait shorter (the typical response time is supposed to be 30ms, wait 100ms.) Also, if the frame failed to be transmitted try again right away instead of waiting. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-31mac80211: inform the driver about update of dtim_periodEmmanuel Grumbach
Currently, when the driver requires the DTIM period, mac80211 will wait to hear a beacon before association. This behavior is suboptimal since some drivers may be able to deal with knowing the DTIM period after the association, if they get it at all. To address this, notify the drivers with bss_info_changed with the new BSS_CHANGED_DTIM_PERIOD flag when the DTIM becomes known. This might be when changing to associated, or later when the entire association was done with only probe response information. Rename the hardware flag for the current behaviour to IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC to more accurately reflect its behaviour. IEEE80211_HW_NEED_DTIM_PERIOD is no longer accurate as all drivers get the DTIM period now, just not before association. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-16mac80211: call restart complete at wowlan resume timeJohannes Berg
When the driver's resume function can't completely restore the configuration in the device, it returns 1 from the callback which will be treated like a HW restart request, but done directly. In this case, also call the driver's restart_complete() function so it can finish the reconfiguration there. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-16mac80211: fix resume from WoWLANJohannes Berg
My commit 529ba6e9313dbe60dab7e72c6fdf647a012e9f5b ("mac80211: clean up association better in suspend") introduced a bug when resuming from WoWLAN when a device reset is desired. This case must not use the suspend_bss_conf as it hasn't been stored. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03mac80211: split aggregation stop by reasonJohannes Berg
The initiator/tx doesn't really identify why an aggregation session is stopped, give a reason for stopping that more clearly identifies what's going on. This will help tell the driver clearly what is expected of it. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03mac80211: reconfig bss_info_changed only if beaconingJohannes Berg
For AP/IBSS/mesh interfaces, call the driver to reconfigure bss_info_changed only if the interface was beaconing before suspend, otherwise we call the driver and it might interpret the change as going from enabled to disabled. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03mac80211: clean up association better in suspendJohannes Berg
When suspending, bss_info_changed() is called to disable beacons, but managed mode interfaces are simply removed (bss_info_changed() is called with "no change" only). This can lead to problems. To fix this and copy the BSS configuration, clear it during suspend and restore it on resume. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2013-01-03mac80211: fix ieee80211_ie_build_vht_cap indentationJohannes Berg
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-12-06Merge branch 'for-john' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next Conflicts: drivers/net/wireless/mwifiex/sta_ioctl.c net/mac80211/scan.c
2012-11-30mac80211: remove probe response temporary buffer allocationJohannes Berg
Instead of allocating a temporary buffer to build IEs build them right into the SKB. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-30mac80211: make ieee80211_build_preq_ies saferJohannes Berg
Instead of assuming 200 bytes are always enough for all the IEs we add, give the length of the buffer to the function and warn instead of overrunning. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-27mac80211: support P2P GO powersave configurationJohannes Berg
If the low-level driver wants to support P2P GO powersave configuration, it must set the cfg80211 flags and mac80211 will pass the parameters to it. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-26Merge branch 'for-john' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
2012-11-26mac80211: support drivers reporting VHT RXJohannes Berg
Add support to mac80211 for having drivers report received VHT MCS information. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-26mac80211: convert to channel definition structJohannes Berg
Convert mac80211 (and where necessary, some drivers a little bit) to the new channel definition struct. This will allow extending mac80211 for VHT, which is currently restricted to channel contexts since there are no drivers using that which makes it easier. As I also don't care about VHT for drivers not using the channel context API, I won't convert the previous API to VHT support. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-21Merge branch 'for-john' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
2012-11-21Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless Conflicts: drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c drivers/net/wireless/iwlwifi/pcie/tx.c
2012-11-20mac80211: fix channel context suspend/reconfig handlingJohannes Berg
Sujith reported warnings with suspend/resume due to channel contexts. When I looked into it, I realised that the code was completely broken as it unassigned the channel contexts when suspending, which actually means they are destroyed. Eliad Peller then pointed out that we also need to remove the channel contexts from the driver. When I looked into this, I also noticed that the code isn't handling the virtual monitor interface correctly (if it exists.) Fix this by calling just the driver methods (if they are implemented) instead of using the channel context management code. Also add reconfiguration for the virtual monitor interface. Reported-by: Sujith Manoharan <sujith@msujith.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-19mac80211: check add_chanctx callback before use in ieee80211_reconfigArend van Spriel
During testing our mac80211 driver a fatal error occurred which was signalled to mac80211. Upon performing the reconfiguration of the device a WARN_ON was triggered. This warning checked the return value of drv_add_chanctx(). However, this returns -EOPNOTSUPP when the driver does not provide the callback. As the callback is optional better check it is defined before calling drv_add_chanctx(). Signed-off-by: Arend van Spriel <arend@broadcom.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-14Merge branch 'for-john' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
2012-11-13mac80211: support RX_FLAG_MACTIME_ENDThomas Pedersen
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>
2012-11-09mac80211: reassign channel contexts before stationsJohannes Berg
Since channel contexts are usually present before stations can be added to an interface, reassign before stations them in reconfiguration as well. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-09mac80211: clarify interface iteration and make it configurableJohannes Berg
During hardware restart, all interfaces are iterated even though they haven't been re-added to the driver, document this behaviour. The same also happens during resume, which is even more confusing since all of the interfaces were previously removed from the driver. Make this optional so drivers relying on the current behaviour can still use it, but to let drivers that don't want this behaviour disable it. Also convert all API users, keeping the old semantics except in hwsim, where the new normal ones are desired. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-09mac80211: call driver method when restart completesJohannes Berg
When the driver requests a restart (reconfiguration) it gets all the normal method calls, but can't really tell why they're happening. Call a new restart_complete op in the driver when the restart completes, so it could keep its own state about the restart and clear it there. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-09mac80211: don't send null data packet when not associatedJohannes Berg
On resume or firmware recovery, mac80211 sends a null data packet to see if the AP is still around and hasn't disconnected us. However, it always does this even if it wasn't even connected before, leading to a warning in the new channel context code. Fix this by checking that it's associated. Cc: stable@vger.kernel.org Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-30mac80211: handle TX power per virtual interfaceJohannes Berg
Even before channel contexts/multi-channel, having a single global TX power limit was already problematic, in particular if two managed interfaces connected to two APs with different power constraints. The channel context introduction completely broke this though and in fact I had disabled TX power configuration there for drivers using channel contexts. Change everything to track TX power per interface so that different user settings and different channel maxima are treated correctly. Also continue tracking the global TX power though for compatibility with applications that attempt to configure the wiphy's TX power globally. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-30Merge remote-tracking branch 'wireless-next/master' into mac80211-nextJohannes Berg
2012-10-29Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless Conflicts: drivers/net/wireless/mwifiex/cfg80211.c
2012-10-29Merge branch 'for-john' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
2012-10-29Merge branch 'for-john' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
2012-10-26mac80211: add explicit AP/GO driver operationsJohannes Berg
Depending on the driver, a lot of setup may be necessary to start operating as an AP, some of which may fail. Add an explicit AP start driver method to make such failures easier to handle, and add an AP stop driver method for symmetry. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-25mac80211: use non-atomic bitmap operation for local variableJohannes Berg
For a local variable there's no need to use the atomic set_bit() operation, use __set_bit() instead. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-24mac80211: use blacklist for duplicate IE checkJohannes Berg
Instead of the current whitelist which accepts duplicates only for the quiet and vendor IEs, use a blacklist of all IEs (that we currently parse) that can't be duplicated. This avoids detecting a beacon as corrupt in the future when new IEs are added that can be duplicated. Cc: stable@vger.kernel.org Signed-off-by: Paul Stewart <pstew@chromium.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-23Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless Conflicts: drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c net/mac80211/mlme.c
2012-10-17mac80211: VHT peer STA capsMahesh Palivela
Save the AP's VHT capabilities (in managed mode) and make them available to the driver in the station information. Unlike HT capabilities, they aren't restricted to the common capabilities, so drivers must be aware of their own capabilities. Signed-off-by: Mahesh Palivela <maheshp@posedge.com> [fix endian conversion bug ...] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-17ieee80211: Rename VHT cap structMahesh Palivela
Rename struct ieee80211_vht_capabilities to ieee80211_vht_cap and renamed its member vht_capabilities_info to vht_cap_info. Signed-off-by: Mahesh Palivela <maheshp@posedge.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-17mac80211: Take status code as parameter to ieee80211_send_authJouni Malinen
Non-zero status code may be needed for Authentication frames, e.g., when using SAE. Signed-off-by: Jouni Malinen <j@w1.fi> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-17mac80211: track needed RX chains for channel contextsJohannes Berg
On each channel that the device is operating on, it may need to listen using one or more chains depending on the SMPS settings of the interfaces using it. The previous channel context changes completely removed this ability (before, it was available as the SMPS mode). Add per-context tracking of the required static and dynamic RX chains and notify the driver on changes. To achieve this, track the chains and SMPS mode used on each virtual interface and update the channel context whenever this changes. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-17mac80211: use channel contextsJohannes Berg
Instead of operating on a single channel only, use the new channel context infrastructure in all mac80211 code. This enables drivers that want to use the new channel context infrastructure to use multiple channels, while nothing should change for all the other drivers that don't support it. Right now this disables both TX power settings and spatial multiplexing powersave. Both need to be re-enabled on a channel context basis. Additionally, when channel contexts are used drop the connection when channel switch is received rather than trying to handle it. This will have to be improved later. [With fixes from Eliad and Emmanuel incorporated] Signed-off-by: Eliad Peller <eliad@wizery.com> Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-10-15mac80211: use ieee80211_free_txskb in a few more placesFelix Fietkau
Free tx status skbs when draining power save buffers, pending frames, or when tearing down a vif. Fixes remaining conditions that can lead to hostapd/wpa_supplicant hangs when running out of socket write memory. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Cc: stable@vger.kernel.org Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-09-14mac80211: change locking around ieee80211_recalc_smpsJohannes Berg
Make the function acquire the necessary mutex itself to simplify the callers. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-07mac80211: move ieee80211_send_deauth_disassoc outside mlme codeAntonio Quartulli
Move ieee80211_send_deauth_disassoc() to util.c to make it available for the rest of the mac80211 code. Signed-off-by: Antonio Quartulli <ordex@autistici.org> [reword commit message] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-09-06mac80211: check power constraint IE size when parsingJohannes Berg
The power constraint IE is always a single byte so check the size when parsing instead of later. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20mac80211: pass channel to ieee80211_send_probe_reqJohannes Berg
In multi-channel scenarios, the channel that we will transmit a probe request on isn't always the current channel (which will be NULL anyway) but will instead be the channel that the AP is on. Pass the channel to the ieee80211_send_probe_req() function so it can be used in the different scenarios. The scan code continues to pass the current channel, of course. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-08-20mac80211: support P2P Device abstractionJohannes Berg
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>