Commit 7be5086d authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

mac80211: add probe request filter flag 



Using the frame registration notification, we
can see when probe requests are requested and
notify the low-level driver via filtering. The
flag is also set in AP and IBSS modes.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 271733cf

include/net/mac80211.h

+6 −3
Original line number Diff line number Diff line
@@ -1484,6 +1484,8 @@ ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 
 *

 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only

 * 	those addressed to this station.

 *

 * @FIF_PROBE_REQ: pass probe request frames

 */

enum ieee80211_filter_flags {

	FIF_PROMISC_IN_BSS	= 1<<0,
@@ -1494,6 +1496,7 @@ enum ieee80211_filter_flags { 
	FIF_CONTROL		= 1<<5,

	FIF_OTHER_BSS		= 1<<6,

	FIF_PSPOLL		= 1<<7,

	FIF_PROBE_REQ		= 1<<8,

};



/**

net/mac80211/cfg.c

+18 −0
Original line number Diff line number Diff line
@@ -1604,6 +1604,23 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct net_device *dev, 
	return 0;

}



static void ieee80211_mgmt_frame_register(struct wiphy *wiphy,

					  struct net_device *dev,

					  u16 frame_type, bool reg)

{

	struct ieee80211_local *local = wiphy_priv(wiphy);



	if (frame_type != (IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_REQ))

		return;



	if (reg)

		local->probe_req_reg++;

	else

		local->probe_req_reg--;



	ieee80211_queue_work(&local->hw, &local->reconfig_filter);

}



struct cfg80211_ops mac80211_config_ops = {

	.add_virtual_intf = ieee80211_add_iface,

	.del_virtual_intf = ieee80211_del_iface,
@@ -1655,4 +1672,5 @@ struct cfg80211_ops mac80211_config_ops = { 
	.cancel_remain_on_channel = ieee80211_cancel_remain_on_channel,

	.mgmt_tx = ieee80211_mgmt_tx,

	.set_cqm_rssi_config = ieee80211_set_cqm_rssi_config,

	.mgmt_frame_register = ieee80211_mgmt_frame_register,

};

net/mac80211/ieee80211_i.h

+3 −1
Original line number Diff line number Diff line
@@ -707,7 +707,9 @@ struct ieee80211_local { 
	int open_count;

	int monitors, cooked_mntrs;

	/* number of interfaces with corresponding FIF_ flags */

	int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll;

	int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,

	    fif_probe_req;

	int probe_req_reg;

	unsigned int filter_flags; /* FIF_* */



	bool wiphy_ciphers_allocated;

net/mac80211/iface.c

+8 −1
Original line number Diff line number Diff line
@@ -280,8 +280,11 @@ static int ieee80211_do_open(struct net_device *dev, bool coming_up) 
			ieee80211_start_mesh(sdata);

		} else if (sdata->vif.type == NL80211_IFTYPE_AP) {

			local->fif_pspoll++;

			local->fif_probe_req++;



			ieee80211_configure_filter(local);

		} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {

			local->fif_probe_req++;

		}



		changed |= ieee80211_reset_erp_info(sdata);
@@ -428,8 +431,12 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, 
	if (sdata->flags & IEEE80211_SDATA_PROMISC)

		atomic_dec(&local->iff_promiscs);



	if (sdata->vif.type == NL80211_IFTYPE_AP)

	if (sdata->vif.type == NL80211_IFTYPE_AP) {

		local->fif_pspoll--;

		local->fif_probe_req--;

	} else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {

		local->fif_probe_req--;

	}



	netif_addr_lock_bh(sdata->dev);

	spin_lock_bh(&local->filter_lock);

net/mac80211/main.c

+3 −0
Original line number Diff line number Diff line
@@ -54,6 +54,9 @@ void ieee80211_configure_filter(struct ieee80211_local *local) 
	if (local->monitors || local->scanning)

		new_flags |= FIF_BCN_PRBRESP_PROMISC;



	if (local->fif_probe_req || local->probe_req_reg)

		new_flags |= FIF_PROBE_REQ;



	if (local->fif_fcsfail)

		new_flags |= FIF_FCSFAIL;

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