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mac80211: support GTK rekey offload
This adds the necessary mac80211 APIs to support GTK rekey offload, mirroring the functionality from cfg80211. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
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e5497d766a
commit
c68f4b892c
@ -1700,6 +1700,12 @@ enum ieee80211_ampdu_mlme_action {
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* which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY.
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* The callback must be atomic.
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*
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* @set_rekey_data: If the device supports GTK rekeying, for example while the
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* host is suspended, it can assign this callback to retrieve the data
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* necessary to do GTK rekeying, this is the KEK, KCK and replay counter.
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* After rekeying was done it should (for example during resume) notify
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* userspace of the new replay counter using ieee80211_gtk_rekey_notify().
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*
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* @hw_scan: Ask the hardware to service the scan request, no need to start
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* the scan state machine in stack. The scan must honour the channel
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* configuration done by the regulatory agent in the wiphy's
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@ -1912,6 +1918,9 @@ struct ieee80211_ops {
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struct ieee80211_key_conf *conf,
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struct ieee80211_sta *sta,
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u32 iv32, u16 *phase1key);
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void (*set_rekey_data)(struct ieee80211_hw *hw,
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struct ieee80211_vif *vif,
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struct cfg80211_gtk_rekey_data *data);
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int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
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struct cfg80211_scan_request *req);
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void (*cancel_hw_scan)(struct ieee80211_hw *hw,
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@ -2585,6 +2594,17 @@ ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
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void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf,
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struct sk_buff *skb,
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enum ieee80211_tkip_key_type type, u8 *key);
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/**
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* ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying
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* @vif: virtual interface the rekeying was done on
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* @bssid: The BSSID of the AP, for checking association
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* @replay_ctr: the new replay counter after GTK rekeying
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* @gfp: allocation flags
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*/
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void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid,
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const u8 *replay_ctr, gfp_t gfp);
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/**
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* ieee80211_wake_queue - wake specific queue
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* @hw: pointer as obtained from ieee80211_alloc_hw().
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@ -2101,6 +2101,21 @@ static void ieee80211_get_ringparam(struct wiphy *wiphy,
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drv_get_ringparam(local, tx, tx_max, rx, rx_max);
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}
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static int ieee80211_set_rekey_data(struct wiphy *wiphy,
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struct net_device *dev,
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struct cfg80211_gtk_rekey_data *data)
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{
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struct ieee80211_local *local = wiphy_priv(wiphy);
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struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
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if (!local->ops->set_rekey_data)
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return -EOPNOTSUPP;
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drv_set_rekey_data(local, sdata, data);
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return 0;
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}
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struct cfg80211_ops mac80211_config_ops = {
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.add_virtual_intf = ieee80211_add_iface,
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.del_virtual_intf = ieee80211_del_iface,
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@ -2163,4 +2178,5 @@ struct cfg80211_ops mac80211_config_ops = {
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.get_antenna = ieee80211_get_antenna,
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.set_ringparam = ieee80211_set_ringparam,
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.get_ringparam = ieee80211_get_ringparam,
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.set_rekey_data = ieee80211_set_rekey_data,
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};
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@ -647,4 +647,14 @@ static inline int drv_set_bitrate_mask(struct ieee80211_local *local,
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return ret;
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}
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static inline void drv_set_rekey_data(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct cfg80211_gtk_rekey_data *data)
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{
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trace_drv_set_rekey_data(local, sdata, data);
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if (local->ops->set_rekey_data)
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local->ops->set_rekey_data(&local->hw, &sdata->vif, data);
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trace_drv_return_void(local);
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}
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#endif /* __MAC80211_DRIVER_OPS */
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@ -1024,6 +1024,34 @@ TRACE_EVENT(drv_set_bitrate_mask,
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)
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);
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TRACE_EVENT(drv_set_rekey_data,
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TP_PROTO(struct ieee80211_local *local,
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struct ieee80211_sub_if_data *sdata,
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struct cfg80211_gtk_rekey_data *data),
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TP_ARGS(local, sdata, data),
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TP_STRUCT__entry(
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LOCAL_ENTRY
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VIF_ENTRY
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__array(u8, kek, NL80211_KEK_LEN)
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__array(u8, kck, NL80211_KCK_LEN)
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__array(u8, replay_ctr, NL80211_REPLAY_CTR_LEN)
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),
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TP_fast_assign(
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LOCAL_ASSIGN;
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VIF_ASSIGN;
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memcpy(__entry->kek, data->kek, NL80211_KEK_LEN);
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memcpy(__entry->kck, data->kck, NL80211_KCK_LEN);
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memcpy(__entry->replay_ctr, data->replay_ctr,
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NL80211_REPLAY_CTR_LEN);
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),
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TP_printk(LOCAL_PR_FMT VIF_PR_FMT,
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LOCAL_PR_ARG, VIF_PR_ARG)
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);
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/*
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* Tracing for API calls that drivers call.
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*/
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@ -1293,6 +1321,27 @@ DEFINE_EVENT(local_only_evt, api_remain_on_channel_expired,
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TP_ARGS(local)
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);
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TRACE_EVENT(api_gtk_rekey_notify,
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TP_PROTO(struct ieee80211_sub_if_data *sdata,
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const u8 *bssid, const u8 *replay_ctr),
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TP_ARGS(sdata, bssid, replay_ctr),
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TP_STRUCT__entry(
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VIF_ENTRY
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__array(u8, bssid, ETH_ALEN)
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__array(u8, replay_ctr, NL80211_REPLAY_CTR_LEN)
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),
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TP_fast_assign(
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VIF_ASSIGN;
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memcpy(__entry->bssid, bssid, ETH_ALEN);
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memcpy(__entry->replay_ctr, replay_ctr, NL80211_REPLAY_CTR_LEN);
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),
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TP_printk(VIF_PR_FMT, VIF_PR_ARG)
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);
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/*
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* Tracing for internal functions
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* (which may also be called in response to driver calls)
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@ -613,3 +613,15 @@ void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata)
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mutex_unlock(&sdata->local->key_mtx);
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}
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void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid,
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const u8 *replay_ctr, gfp_t gfp)
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{
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struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
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trace_api_gtk_rekey_notify(sdata, bssid, replay_ctr);
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cfg80211_gtk_rekey_notify(sdata->dev, bssid, replay_ctr, gfp);
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}
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EXPORT_SYMBOL_GPL(ieee80211_gtk_rekey_notify);
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