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5a3d9882b8
As I just discovered while doing WoWLAN, HW crypto is done wrong for GTKs: they should be programmed for the AP station ID (in the managed mode case) and the HW can actually deal with multiple group keys per station as well (which is useful in IBSS RSN but that I've chosen not to use this). To fix all this, modify the way keys are sent to the device and key offsets are allocated. After these changes, key offsets are stored into the hw_key_idx which we can then track for the key lifetime, not relying on our sta_cmd array. WEP default keys get special treatment, of course. Additionally, since I had the API for it, we can now pre-fill TKIP phase 1 keys for RX now that we can obtain the P1K from mac80211, a capability I had added for WoWLAN initially. Finally, some keys simply don't need to be added into the device's key cache -- a key that won't be used for RX is only needed in the TX header, so "pretend" to have accepted any key without adding it into the device -- no need to use up key space there for it. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
139 lines
4.8 KiB
C
139 lines
4.8 KiB
C
/******************************************************************************
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*
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* Copyright(c) 2003 - 2011 Intel Corporation. All rights reserved.
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*
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* Portions of this file are derived from the ipw3945 project, as well
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* as portions of the ieee80211 subsystem header files.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
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*
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* The full GNU General Public License is included in this distribution in the
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* file called LICENSE.
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*
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* Contact Information:
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* Intel Linux Wireless <ilw@linux.intel.com>
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* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*
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*****************************************************************************/
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#ifndef __iwl_sta_h__
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#define __iwl_sta_h__
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#include "iwl-dev.h"
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#define IWL_STA_DRIVER_ACTIVE BIT(0) /* driver entry is active */
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#define IWL_STA_UCODE_ACTIVE BIT(1) /* ucode entry is active */
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#define IWL_STA_UCODE_INPROGRESS BIT(2) /* ucode entry is in process of
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being activated */
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#define IWL_STA_LOCAL BIT(3) /* station state not directed by mac80211;
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(this is for the IBSS BSSID stations) */
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#define IWL_STA_BCAST BIT(4) /* this station is the special bcast station */
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void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx);
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void iwl_clear_ucode_stations(struct iwl_priv *priv,
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struct iwl_rxon_context *ctx);
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void iwl_dealloc_bcast_stations(struct iwl_priv *priv);
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int iwl_get_free_ucode_key_offset(struct iwl_priv *priv);
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int iwl_send_add_sta(struct iwl_priv *priv,
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struct iwl_addsta_cmd *sta, u8 flags);
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int iwl_add_station_common(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
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const u8 *addr, bool is_ap,
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struct ieee80211_sta *sta, u8 *sta_id_r);
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int iwl_remove_station(struct iwl_priv *priv, const u8 sta_id,
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const u8 *addr);
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int iwl_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
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struct ieee80211_sta *sta);
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u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
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const u8 *addr, bool is_ap, struct ieee80211_sta *sta);
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int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
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struct iwl_link_quality_cmd *lq, u8 flags, bool init);
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void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx);
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/**
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* iwl_clear_driver_stations - clear knowledge of all stations from driver
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* @priv: iwl priv struct
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*
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* This is called during iwl_down() to make sure that in the case
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* we're coming there from a hardware restart mac80211 will be
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* able to reconfigure stations -- if we're getting there in the
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* normal down flow then the stations will already be cleared.
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*/
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static inline void iwl_clear_driver_stations(struct iwl_priv *priv)
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{
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unsigned long flags;
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struct iwl_rxon_context *ctx;
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spin_lock_irqsave(&priv->sta_lock, flags);
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memset(priv->stations, 0, sizeof(priv->stations));
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priv->num_stations = 0;
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priv->ucode_key_table = 0;
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for_each_context(priv, ctx) {
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/*
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* Remove all key information that is not stored as part
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* of station information since mac80211 may not have had
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* a chance to remove all the keys. When device is
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* reconfigured by mac80211 after an error all keys will
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* be reconfigured.
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*/
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memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
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ctx->key_mapping_keys = 0;
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}
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spin_unlock_irqrestore(&priv->sta_lock, flags);
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}
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static inline int iwl_sta_id(struct ieee80211_sta *sta)
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{
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if (WARN_ON(!sta))
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return IWL_INVALID_STATION;
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return ((struct iwl_station_priv_common *)sta->drv_priv)->sta_id;
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}
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/**
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* iwl_sta_id_or_broadcast - return sta_id or broadcast sta
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* @priv: iwl priv
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* @context: the current context
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* @sta: mac80211 station
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*
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* In certain circumstances mac80211 passes a station pointer
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* that may be %NULL, for example during TX or key setup. In
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* that case, we need to use the broadcast station, so this
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* inline wraps that pattern.
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*/
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static inline int iwl_sta_id_or_broadcast(struct iwl_priv *priv,
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struct iwl_rxon_context *context,
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struct ieee80211_sta *sta)
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{
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int sta_id;
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if (!sta)
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return context->bcast_sta_id;
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sta_id = iwl_sta_id(sta);
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/*
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* mac80211 should not be passing a partially
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* initialised station!
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*/
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WARN_ON(sta_id == IWL_INVALID_STATION);
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return sta_id;
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}
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#endif /* __iwl_sta_h__ */
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