- 05 Mar, 2009 2 commits
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Vivek Natarajan authored
If the AP thinks we are in power save state eventhough we are not truly in that state, it sets the TIM bit and does not send a data frame unless we send a null data frame to correct the state in the AP. This might happen if the null data frame for wake up is lost in the air after we disable power save. Signed-off-by:
Vivek Natarajan <vnatarajan@atheros.com> Signed-off-by:
John W. Linville <linville@tuxdriver.com>
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Sujith authored
There is no need to parse the AP's HT capabilities if the STA uses TKIP/WEP cipher. This allows the rate control module to choose the correct(legacy) rate table. Signed-off-by:
Sujith <Sujith.Manoharan@atheros.com> Signed-off-by:
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- 27 Feb, 2009 4 commits
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Alina Friedrichsen authored
This patch introduces a generic commit() function which initiate a new network joining process. It should be called after some interface config changes, so that the changes get applied more cleanly. Currently set_ssid() and set_bssid() call it. Others can be added in future patches. In version 1 the header files was forgotten, sorry. Signed-off-by:
Alina Friedrichsen <x-alina@gmx.net> Signed-off-by:
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Jouni Malinen authored
This extends the NL80211_CMD_TRIGGER_SCAN command to allow applications to specify a set of information element(s) to be added into Probe Request frames with NL80211_ATTR_IE. This provides support for the MLME-SCAN.request primitive parameter VendorSpecificInfo and can be used, e.g., to implement WPS scanning. Signed-off-by:
Jouni Malinen <jouni.malinen@atheros.com> Acked-by:
Johannes Berg <johannes@sipsolutions.net> Signed-off-by:
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Johannes Berg authored
This patch splits out the ibss code and data from managed (station) mode. The reason to do this is to better separate the state machines, and have the code be contained better so it gets easier to determine what exactly a given change will affect, that in turn makes it easier to understand. This is quite some churn, especially because I split sdata->u.sta into sdata->u.mgd and sdata->u.ibss, but I think it's easier to maintain that way. I've also shuffled around some code -- null function sending is only applicable to managed interfaces so put that into that file, some other functions are needed from various places so put them into util, and also rearranged the prototypes in ieee80211_i.h accordingly. Signed-off-by:
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Vasanthakumar Thiagarajan authored
It is possible that some broken AP might send HT IEs in it's assoc response even though the STA has not sent them in assoc req when WEP/TKIP is used as pairwise cipher suite. Also it is important to check this bit before enabling ht mode in beacon receive path. Signed-off-by:
Vasanthakumar Thiagarajan <vasanth@atheros.com> Signed-off-by:
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- 13 Feb, 2009 8 commits
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Johannes Berg authored
It appears that you can completely mess up mac80211 in IBSS mode by sending it a disassoc or deauth: it'll stop queues and do a lot more but not ever do anything again. Fix this by not handling all those frames in IBSS mode, Signed-off-by:
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Johannes Berg authored
The code beyond this point is supposed to be used for non-IBSS (managed) mode only. Signed-off-by:
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Johannes Berg authored
Remove all the code from mac80211 to keep track of BSSes and use the cfg80211-provided code completely. Signed-off-by:
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Johannes Berg authored
There's no need to create a BSS struct only to pass it to ieee80211_sta_join_ibss, so refactor this function into __ieee80211_sta_join_ibss which takes all the relevant paramters, and ieee80211_sta_join_ibss which takes a BSS struct (used when joining an IBSS that already has other members). Signed-off-by:
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Johannes Berg authored
This patch adds basic scan capability to cfg80211/nl80211 and changes mac80211 to use it. The BSS list that cfg80211 maintains is made driver-accessible with a private area in each BSS struct, but mac80211 doesn't yet use it. That's another large project. Signed-off-by:
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Johannes Berg authored
The sta_info pointer can very well be passed to ieee80211_sta_tear_down_BA_sessions, this will later allow us to pass it through even further. Signed-off-by:
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Kalle Valo authored
When a directed tim bit is set, mac80211 currently disables power save ands sends a null frame to the AP. But if dynamic power save is disabled, mac80211 will not enable power save ever gain. Fix this by adding ps-poll functionality to mac80211. When a directed tim bit is set, mac80211 sends a ps-poll frame to the AP and checks for the more data bit in the returned data frames. Using ps-poll is slower than waking up with null frame, but it's saves more power in cases where the traffic is low. Userspace can control if either ps-poll or null wakeup method is used by enabling and disabling dynamic power save. Signed-off-by:
Kalle Valo <kalle.valo@nokia.com> Signed-off-by:
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Kalle Valo authored
Currently mac80211 checks for the multicast tim bit from beacons, disables power save and sends a null frame if the bit is set. This was added to support ath9k. But this is a bit controversial because the AP will send multicast frames immediately after the beacon and the time constraints are really high. Relying mac80211 to be fast enough here might not be reliable in all situations. And there's no need to send a null frame, AP will send the frames immediately after the dtim beacon no matter what. Also if dynamic power save is disabled (iwconfig wlan0 power timeout 0) currently mac80211 disables power save whenever the multicast bit is set but it's never enabled again after receiving the first multicast/broadcast frame. The current implementation is not usable on p54/stlc45xx and the easiest way to fix this is to remove the multicast tim bit check altogether. Handling multicast tim bit in host is rare, most of the designs do this in firmware/hardware, so it's better not to have it in mac80211. It's a lot better to do this in firmware/hardware, or if that's not possible it could be done in the driver. Also renamed the function to ieee80211_check_tim() to follow the style of the file. Signed-off-by:
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- 11 Feb, 2009 1 commit
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Vasanthakumar Thiagarajan authored
Signed-off-by:
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- 09 Feb, 2009 4 commits
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Vasanthakumar Thiagarajan authored
There is no point having the bss information of currently associated AP when the AP is detected to be out of range. Signed-off-by:
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Alina Friedrichsen authored
I hold back this patch for around a week to avoid confusion. This is the second step of "mac80211: Fixed BSSID handling revisited". With it, in the situation of a strange merge to the same BSSID (e.g. caused by a TSF overflow) only reset_tsf() is called. And sta_info_flush_delayed() is only called if you change the network manually, not on an automatic BSSID merge. Signed-off-by:
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Alina Friedrichsen authored
This fixes a bug when creating a new IBSS network with a fixed BSSID. The fixed BSSID situation is now with one of my last patches handled in ieee80211_sta_find_ibss() function. It's more robust to test against (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET), because ifsta->state is not seted right in every situation and so the creating of the new IBSS network sometimes hangs after the first try to scan for a network to merge. Signed-off-by:
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Sujith authored
Trying to associate with a non-existent SSID stops the state machine after the first run. Subsequent association requests fail to start the scan engine. Fix this by resetting assoc_scan_tries to zero after completing a scan run. Signed-off-by:
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- 29 Jan, 2009 21 commits
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Alina Friedrichsen authored
This patch cleanup the fixed BSSID handling, that ieee80211_sta_set_bssid() works like ieee80211_sta_set_ssid(). So that the BSSID is only a second selection criterion besides the SSID. This allows us to create new IBSS networks with fixed BSSIDs, which was broken before. In the second version of this patch the handling of the stupid merges to the same BSSID is moved out to get reworked into an other patch. And this version hopefully solves the problems with some low-level drivers and re-adds the config BSSID warning to help debugging the low-level drivers. Much thanks to all who have helped testing! :) Signed-off-by:
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Johannes Berg authored
This patch adds a flag to notify drivers to start and stop beaconing when needed, for example, during a scan run. Based on Sujith's first patch to do the same, but now disables beaconing for all virtual interfaces while scanning, has a separate change flag and tracks user-space requests. Signed-off-by:
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Johannes Berg authored
Since the standards only define 12 legacy rates, 32 is certainly a sane upper limit and we don't need to use u64 everywhere. Add sanity checking that no more than 32 rates are registered and change the variables to u32 throughout. Signed-off-by:
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Jouni Malinen authored
The separate Association Comeback Time IE was removed from IEEE 802.11w and the Timeout Interval IE (from IEEE 802.11r) is used instead. The editing on this is still somewhat incomplete in IEEE 802.11w/D7.0, but still, the use of Timeout Interval IE is the expected mechanism. Signed-off-by:
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Jouni Malinen authored
A new nl80211 command, NL80211_CMD_SET_MGMT_EXTRA_IE, can be used to add arbitrary IE data into the end of management frames. The interface allows extra IEs to be configured for each management frame subtype, but only some of them (ProbeReq, ProbeResp, Auth, (Re)AssocReq, Deauth, Disassoc) are currently accepted in mac80211 implementation. This makes it easier to implement IEEE 802.11 extensions like WPS and FT that add IE(s) into some management frames. In addition, this can be useful for testing and experimentation purposes. Signed-off-by:
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Vasanthakumar Thiagarajan authored
This patch uses power constraint level while determining the maximum transmit power, there by it makes sure that any power mitigation requirement for the channel in the current regulatory domain is met. Signed-off-by:
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Jouni Malinen authored
When MFP is enabled, the AP does not allow a STA to associate if an existing security association exists without first going through SA Query process. When this happens, the association request is denied with a new status code ("temporarily rejected") ans Association Comeback IE is used to notify when the association may be tried again (i.e., when the SA Query procedure has timed out). Use the comeback time to update the mac80211 client MLME timer for next association attempt to minimize waiting time if association is temporarily rejected. Signed-off-by: -
Jouni Malinen authored
Add new WEXT IW_AUTH_* parameter for setting MFP disabled/optional/required. Signed-off-by:
Jouni Malinen <j@w1.fi> Acked-by:
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Jouni Malinen authored
Add flags for setting STA entries and struct ieee80211_if_sta to indicate whether management frame protection (MFP) is used. Signed-off-by:
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Johannes Berg authored
This modifies hardware flags for powersave to support three different flags: * IEEE80211_HW_SUPPORTS_PS - indicates general PS support * IEEE80211_HW_PS_NULLFUNC_STACK - indicates nullfunc sending in software * IEEE80211_HW_SUPPORTS_DYNAMIC_PS - indicates dynamic PS on the device It also adds documentation for all this which explains how to set the various flags. Additionally, it fixes a few things: * a spot where && was used to test flags * enable CONF_PS only when associated again Signed-off-by:
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Johannes Berg authored
This will be needed for drivers that set the IEEE80211_HW_NO_STACK_DYNAMIC_PS flag and still want to handle dynamic PS. Signed-off-by:
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Johannes Berg authored
The channel_type really doesn't need to be the only member in a new structure, so remove the struct. Additionally, remove the _CONF_CHANGE_HT flag and use _CONF_CHANGE_CHANNEL when the channel type changes, since that's enough of a change to require reprogramming the hardware anyway. Signed-off-by:
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Rami Rosen authored
This patch removes an unused parameter (rx_status) in ieee80211_rx_mgmt_probe_req(), in mlme.c. Signed-off-by:
Rami Rosen <ramirose@gmail.com> Signed-off-by:
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Sujith authored
Move to the advertised channel on reception of a CSA element. This is needed for 802.11h compliance. Signed-off-by:
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Alina Friedrichsen authored
If you set a fixed BSSID manually, you never want that the driver change it back, or your ad-hoc mesh network will break into peaces. So don't do it. Signed-off-by:
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Alina Friedrichsen authored
If you set a fixed BSSID and channel it's not necessary to scan for neighbors to merge, because you really don't want to merge with it. So don't do it. Signed-off-by:
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Alina Friedrichsen authored
Okay, here is the first of the five patches. After applying all of them you should be able to build/join huge city mesh networks (e.g. with the OLSR protocol) with the most of the mac80211 wireless drivers by setting a fixed BSSID in the ad hoc mode. (If you found no other bug/problem.) This was not specified in the original standard, but is a widely used de facto standard. The first patch now completely disallow to set multicast MAC addresses as BSSID. The behavior before was really strange. Signed-off-by:
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Luis R. Rodriguez authored
We can simply use conf_is_ht() check where needed. Signed-off-by:
Luis R. Rodriguez <lrodriguez@atheros.com> Acked-by:
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Vivek Natarajan authored
This patch enables mac80211 to send a null frame and also to check for tim in the beacon if dynamic power save is enabled. Signed-off-by:
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Vivek Natarajan authored
a) hw_config() should not be called from siwpower() for the drivers which do not support dynamic powersave. b) IEEE80211_HW_NO_STACK_DYNAMIC_PS needs to be verified in set_associated() also before enabling the power save timers. Signed-off-by:
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Vasanthakumar Thiagarajan authored
As TKIP is not updated to new security needs which arise when TKIP is used to encrypt A-MPDU aggregated data frames, IEEE802.11n does not allow any cipher other than CCMP (Which has new extensions defined) as pairwise cipher between HT peers. When such configuration (TKIP/WEP in HT) is forced, we still associate in non-HT mode (11a/b/g). Signed-off-by:
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