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2008-01-28mac80211: dont use interface indices in driversJohannes Berg
This patch gets rid of the if_id stuff where possible in favour of a new per-virtual-interface structure "struct ieee80211_vif". This structure is located at the end of the per-interface structure and contains a variable length driver-use data area. This has two advantages: * removes the need to look up interfaces by if_id, this is better for working with network namespaces and performance * allows drivers to store and retrieve per-interface data without having to allocate own lists/hash tables Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-01-28mac80211: Add radio led triggerIvo van Doorn
Some devices have a seperate LED which indicates if the radio is enabled or not. This adds a LED trigger to mac80211 where drivers can hook into when they are interested in radio status changes. v2: Check hw.conf.radio_enabled when calling start(). Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28rc80211_pid should respect fixed rates.Andrew Lutomirski
I would argue that mac80211 should handle fixed rates outside the rate control code, which would also allow them to take effect immediately instead of during the rate control callback, but this is pretty close to correct. Signed-Off-By: Andy Lutomirski <luto@myrealbox.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: better rate control algorithm selectionJohannes Berg
This patch changes mac80211's Kconfig/Makefile to: * select between the PID and the SIMPLE rate control algorithm as default * always allow tri-state for the rate control algorithms, building those that are selected 'y' into the mac80211 module (if that is a module, otherwise all into the kernel) * force the default rate control algorithm to be built into mac80211 It also makes both rate control algorithms proper modules again with MODULE_LICENSE etc. Only if EMBEDDED is the user allowed to select "NONE" as default which will cause no algorithm to be selected, this will work only when the driver brings one itself (e.g. iwlwifi drivers). Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: A-MPDU Rx handling DELBA requestsRon Rindjunsky
This patch opens the flow to DELBA management frames, and handles end of A-MPDU session produced by this event. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: A-MPDU Rx adding BAR handling capabilityRon Rindjunsky
This patch adds the ability to handle Block Ack Request Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: A-MPDU Rx handling aggregation reorderingRon Rindjunsky
This patch handles the reordering of the Rx A-MPDU. This issue occurs when the sequence of the internal MPDUs is not in the right order. such a case can be encountered for example when some MPDUs from previous aggregations were recieved, while others failed, so current A-MPDU will contain a mix of re-transmited MPDUs and new ones. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: A-MPDU Rx MLME data initializationRon Rindjunsky
This patch initialize A-MPDU MLME data for Rx sessions. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: A-MPDU Rx adding basic functionalityRon Rindjunsky
This patch adds the basic needed abilities and functions for A-MPDU Rx session changed functions: - ieee80211_sta_process_addba_request - Rx A-MPDU initialization enabled - ieee80211_stop - stops all A-MPDU Rx in case interface goes down added functions: - ieee80211_send_delba - used for sending out Del BA in A-MPDU sessions - ieee80211_sta_stop_rx_BA_session - stopping Rx A-MPDU session - sta_rx_agg_session_timer_expired - stops A-MPDU Rx use if load is too low Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: A-MPDU Rx add MLME structuresRon Rindjunsky
This patch adds the needed structures to describe the Rx aggregation MLME per STA new: - struct tid_ampdu_rx: TID aggregation information (Rx) - struct sta_ampdu_mlme: MLME aggregation information for STA changed: - struct sta_info: ampdu_mlme added to describe A-MPDU MLME per STA, and timer_to_tid added to map timer id into TID Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: restructure __ieee80211_rxRon Rindjunsky
This patch makes a separation between Rx frame pre-handling which stays in __ieee80211_rx and Rx frame handlers, moving to __ieee80211_rx_handle_packet. Although this separation has no affect in regular mode of operation, this kind of mechanism will be used in A-MPDU frames reordering as it allows accumulation of frames during pre-handling, dispatching them to later handling when necessary. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: make rc_pid_fop_events staticJohannes Berg
No need to not be. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28rc80211-pid: fix definition of rate control intervalStefano Brivio
Fix the rate control interval definition. Thanks to Mattias Nissler for spotting this out. Cc: Mattias Nissler <mattias.nissler@gmx.de> Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: remove misleading 'res' variableJohannes Berg
When this function returns != CONTINUE, it needs to put the station struct it has acquired. Hence, having this unused variable is not just superfluous but also misleading. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28rc80211-pid: pf_target tuningStefano Brivio
Set a better value for percentage target for failed frames. The previous value slowed down too much rate increases in case of permanently low activity. While at it, increase readability. Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28rc80211-pid: fix sta_info refcountingStefano Brivio
Fix a bug which caused uncorrect refcounting of PHYs in mac80211. Thanks to Johannes Berg for spotting this out. Cc: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28rc80211-pid: simplify and fix shift_adjustStefano Brivio
Simplify and fix rate_control_pid_shift_adjust(). A bug prevented correct mapping of sorted rates, and readability was seriously flawed. Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28rc80211-pid: add kerneldoc for tunable parametersStefano Brivio
Add a kerneldoc description for parameters which are tunable through debugfs. Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28rc80211-pid: export human-readable target_pf value to debugfsStefano Brivio
Export the non-shifted target_pf value to debugfs, so that it's human-readable. Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: Restore rx.fc before every invocation of ieee80211_invoke_rx_handlersHelmut Schaa
This patch fixes a problem with rx handling on multiple interfaces. Especially when using hardware-scanning and a wireless driver (i.e. iwlwifi) which is able to receive data while scanning. The rx handlers can modify the skb and the frame control field (see ieee80211_rx_h_remove_qos_control) but since every interface gets its own copy of the skb each should get its own copy of rx.fc too. In my case the wlan0-interface did not remove the qos-control from the frame because the corresponding flag in rx.fc was already removed while processing the frame on the master interface. Therefore somehow corrupted frames were passed to the userspace. Signed-off-by: Helmut Schaa <hschaa@suse.de> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28net/mac80211/Kconfig: whitespace correctionsJohn W. Linville
Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: don't read ERP information from (re)association responseJohannes Berg
According to the standard, the field cannot be present, so don't try to interpret it either. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Daniel Drake <dsd@gentoo.org> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: move tx crypto decisionJohannes Berg
This patch moves the decision making about whether a frame is encrypted with a certain algorithm up into the TX handlers rather than having it in the crypto algorithm implementation. This fixes a problem with the radiotap injection code where injecting a non-data packet and requesting encryption could end up asking the driver to encrypt a packet without giving it a key. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: implement station stats retrievalJohannes Berg
This implements the required cfg80211 callback in mac80211 to allow userspace to get station statistics. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: support getting key sequence counters via cfg80211Johannes Berg
This implements cfg80211's get_key() to allow retrieving the sequence counter for a TKIP or CCMP key from userspace. It also cleans up and documents the associated low-level driver interface. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: support adding/removing keys via cfg80211Johannes Berg
This adds the necessary hooks to mac80211 to allow userspace to edit keys with cfg80211 (through nl80211.) Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: allow easier multicast/broadcast buffering in hardwareJohannes Berg
There are various decisions influencing the decision whether to buffer a frame for after the next DTIM beacon. The "do we have stations in PS mode" condition cannot be tested by the driver so mac80211 has to do that. To ease driver writing for hardware that can buffer frames until after the next DTIM beacon, introduce a new txctl flag telling the driver to buffer a specific frame. While at it, restructure and comment the code for multicast buffering and remove spurious "inline" directives. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Cc: Michael Buesch <mb@bu3sch.de> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: make ieee80211_rx_mgmt_action staticJohannes Berg
The function is only used locally. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: clean up eapol handling in TX pathJohannes Berg
The previous patch left only one user of the ieee80211_is_eapol() function and that user can be eliminated easily by introducing a new "frame is EAPOL" flag to handle the frame specially (we already have this information) instead of doing the (expensive) ieee80211_is_eapol() all the time. Also, allow unencrypted frames to be sent when they are injected. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: clean up eapol frame handling/port controlJohannes Berg
This cleans up the eapol frame handling and some related code in the receive and transmit paths. After this patch * EAPOL frames addressed to us or the EAPOL group address are always accepted regardless of whether they are encrypted or not * other frames from a station are dropped if PAE is enabled and the station is not authorized * unencrypted frames (except the EAPOL frames above) are dropped if drop_unencrypted is enabled * some superfluous code that eth_type_trans handles anyway is gone * port control is done for transmitted packets Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28rc80211-pid: export tuning parameters through debugfsMattias Nissler
This adds all the tunable parameters used by rc80211_pid to debugfs for easy testing and tuning. Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de> Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28rc80211-pid: add debuggingMattias Nissler
This adds a new debugfs file from which rate control relevant events can be read one event per line. The output includes the current time, so graphs can be created showing the rate control parameters. This helps in evaluating and tuning rate control parameters. While at it, we split headers and code for better readability. Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de> Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28rc80211-pid: add sharpening factorStefano Brivio
This patch introduces a PID sharpening factor for faster response after association and low activity events. Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28rc80211-pid: add rate behaviour learning algorithmStefano Brivio
This patch introduces a learning algorithm in order for the PID controller to learn how to map adjustment values to rates. This is better described in code comments. Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: make PID rate control algorithm the defaultStefano Brivio
This makes the new PID TX rate control algorithm the default instead of the rc80211_simple rate control algorithm. The simple algorithm was flawed in several ways: it wasn't responsive at all and didn't age the information it was relying on properly. The PID algorithm allows us to tune characteristics such as responsiveness by adjusting parameters and was found to generally behave better. The default algorithm can be overridden to select simple instead. Which ever algorithm is the default is included as part of the mac80211 module automatically. The other algorithm (simple vs. pid) can be selected for inclusion as well. If EMBEDDED is selected then the choice is available to have no default specified and neither algorithm included in mac80211. The default algorithm can be set through a modparam. While at it, mark rc80211-simple as deprecated, and schedule it for removal. Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: add PID controller based rate control algorithmMattias Nissler
Add a new rate control algorithm based on a PID controller. It samples the percentage of failed frames over time, feeds the result into the controller and uses its output to control the TX rate. Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: clean up rate selectionMattias Nissler
Move some code out of rc80211_simple since it's probably needed for all rate selection algorithms, and fix iwlwifi accordingly. While at it, clean up the rate_control_get_rate() interface. Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: pass in PS_POLL framesRon Rindjunsky
This patch fixes should_drop_frame function to pass in ps poll control frames required for power save functioanlity. Interface types that do not have interest for PS POLL frames now drop it in handler. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28introduce WEXT scan capabilitiesDan Williams
Introduce scan capabilities to WEXT so that userspace can do intelligent things with scan behavior such as handling hidden SSIDs more gracefully. If the driver reports a specific scan capability, the driver must respect the options specified in the iw_scan_req structure when handling the SIOCSIWSCAN call, unless it's mode or state does not allow it to do so, in which case it must return an error. This version switches to Dave Kilroy's suggestion of claiming unused padding space for the scan_capa field. Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: conditionally include timestamp in radiotap informationJohannes Berg
This makes mac80211 include the low-level MAC timestamp in the radiotap header if the driver indicated (by a new RX flag) that the timestamp is valid. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28[MAC80211]: Use htons() where appropriate.YOSHIFUJI Hideaki
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: remove "bcn_int" and "capab" scan results infoJohn W. Linville
These bits were dead code before "mac80211: Remove local->scan_flags" (commit 6681dd3fd0e4d36a4547415853e83411baa7b705) and probably should have been removed as part of that commit. Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: move A-MSDU identifier to flagsRon Rindjunsky
This patch moves u8 amsdu_frame in ieee80211_txrx_data to the flags section as IEEE80211_TXRXD_RX_AMSDU Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: adding 802.11n configuration flowsRon Rindjunsky
This patch configures the 802.11n mode of operation internally in ieee80211_conf structure and in the low-level driver as well (through op conf_ht). It does not include AP configuration flows. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: adding 802.11n essential A-MSDU Rx capabilityRon Rindjunsky
This patch adds the ability to receive and handle A-MSDU frames. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: adding 802.11n essential A-MPDU addBA capabilityRon Rindjunsky
This patch adds the capability to identify and answer an add block ACK request. As this series of patches only adds HT handling with no aggregations, (A-MPDU aggregations acceptance is not obligatory according to 802.11n draft) we are currently sending back a refusal upon this request. Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: adding 802.11n IEs handlingRon Rindjunsky
This patch presents the ability to parse and compose HT IEs, and to put the IE relevant data inside the mac80211's internal HT structures Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: adding 802.11n HT framework definitionsRon Rindjunsky
New structures: - ieee80211_ht_info: describing STA's HT capabilities - ieee80211_ht_bss_info: describing BSS's HT characteristics Changed structures: - ieee80211_hw_mode: now also holds PHY HT capabilities for each HW mode - ieee80211_conf: ht_conf holds current self HT configuration ht_bss_conf holds current BSS HT configuration - flag IEEE80211_CONF_SUPPORT_HT_MODE added to indicate if HT use is desired - sta_info: now also holds Peer's HT capabilities Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: adding MAC80211_HT_DEBUG config variableRon Rindjunsky
This patch adds MAC80211_HT_DEBUG config variable to separate HT debug features Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28mac80211: allow setting drop_unencrypted with wextJohannes Berg
This patch allows wpa_supplicant to set the drop_unencrypted setting in mac80211. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>