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Commit 18a83659 authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

cfg80211: introduce scan IE limit attribute 



This patch introduces a new attribute for a wiphy that tells
userspace how long the information elements added to a probe
request frame can be at most. It also updates the at76 to
advertise that it cannot support that, and, for now until I
can fix that, iwlwifi too.

Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 75c2148f

drivers/net/wireless/at76c50x-usb.c

+1 −0
Original line number Diff line number Diff line
@@ -2250,6 +2250,7 @@ static int at76_init_new_device(struct at76_priv *priv, 


	/* mac80211 initialisation */

	priv->hw->wiphy->max_scan_ssids = 1;

	priv->hw->wiphy->max_scan_ie_len = 0;

	priv->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);

	priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &at76_supported_band;

	priv->hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |

drivers/net/wireless/iwlwifi/iwl-core.c

+1 −0
Original line number Diff line number Diff line
@@ -1306,6 +1306,7 @@ int iwl_setup_mac(struct iwl_priv *priv) 


	hw->wiphy->custom_regulatory = true;

	hw->wiphy->max_scan_ssids = 1;

	hw->wiphy->max_scan_ie_len = 0; /* XXX for now */



	/* Default value; 4 EDCA QOS priorities */

	hw->queues = 4;

include/linux/nl80211.h

+4 −0
Original line number Diff line number Diff line
@@ -390,6 +390,8 @@ enum nl80211_commands { 
 *

 * @NL80211_ATTR_MAX_NUM_SCAN_SSIDS: number of SSIDs you can scan with

 *	a single scan request, a wiphy attribute.

 * @NL80211_ATTR_MAX_SCAN_IE_LEN: maximum length of information elements

 *	that can be added to a scan request

 *

 * @NL80211_ATTR_SCAN_FREQUENCIES: nested attribute with frequencies (in MHz)

 * @NL80211_ATTR_SCAN_SSIDS: nested attribute with SSIDs, leave out for passive
@@ -507,6 +509,8 @@ enum nl80211_attrs { 


	NL80211_ATTR_KEY_TYPE,



	NL80211_ATTR_MAX_SCAN_IE_LEN,



	/* add attributes here, update the policy in nl80211.c */



	__NL80211_ATTR_AFTER_LAST,

include/net/wireless.h

+1 −0
Original line number Diff line number Diff line
@@ -222,6 +222,7 @@ struct wiphy { 


	int bss_priv_size;

	u8 max_scan_ssids;

	u16 max_scan_ie_len;



	/* If multiple wiphys are registered and you're handed e.g.

	 * a regular netdev with assigned ieee80211_ptr, you won't

net/mac80211/main.c

+12 −1
Original line number Diff line number Diff line
@@ -728,7 +728,18 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 
		return NULL;



	wiphy->privid = mac80211_wiphy_privid;



	if (!ops->hw_scan) {

		/* For hw_scan, driver needs to set these up. */

		wiphy->max_scan_ssids = 4;



		/* we support a maximum of 32 rates in cfg80211 */

		wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN

					 - 2 - 32 /* SSID */

					 - 4 - 32 /* (ext) supp rates */;



	}



	/* Yes, putting cfg80211_bss into ieee80211_bss is a hack */

	wiphy->bss_priv_size = sizeof(struct ieee80211_bss) -

			       sizeof(struct cfg80211_bss);