Commit df942e7b authored by Sunil Dutt Undekari's avatar Sunil Dutt Undekari Committed by Johannes Berg
Browse files

cfg80211: Pass TDLS peer capability information in tdls_mgmt 



While framing the TDLS Setup Confirmation frame, the driver needs to
know if the TDLS peer is VHT/HT/WMM capable and thus shall construct
the VHT/HT operation / WMM parameter elements accordingly. Supplicant
determines if the TDLS peer is VHT/HT/WMM capable based on the
presence of the respective IEs in the received TDLS Setup Response frame.

The host driver should not need to parse the received TDLS Response
frame and thus, should be able to rely on the supplicant to indicate
the capability of the peer through additional flags while transmitting
the TDLS Setup Confirmation frame through tdls_mgmt operations.

Signed-off-by: default avatarSunil Dutt Undekari <usdutt@qti.qualcomm.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent bf5f4833

drivers/net/wireless/mwifiex/cfg80211.c

+2 −2
Original line number Diff line number Diff line
@@ -2600,8 +2600,8 @@ static int mwifiex_cfg80211_set_coalesce(struct wiphy *wiphy, 
static int

mwifiex_cfg80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,

			   u8 *peer, u8 action_code, u8 dialog_token,

			   u16 status_code, const u8 *extra_ies,

			   size_t extra_ies_len)

			   u16 status_code, u32 peer_capability,

			   const u8 *extra_ies, size_t extra_ies_len)

{

	struct mwifiex_private *priv = mwifiex_netdev_get_priv(dev);

	int ret;

include/net/cfg80211.h

+2 −1
Original line number Diff line number Diff line
@@ -2465,7 +2465,8 @@ struct cfg80211_ops { 


	int	(*tdls_mgmt)(struct wiphy *wiphy, struct net_device *dev,

			     u8 *peer, u8 action_code,  u8 dialog_token,

			     u16 status_code, const u8 *buf, size_t len);

			     u16 status_code, u32 peer_capability,

			     const u8 *buf, size_t len);

	int	(*tdls_oper)(struct wiphy *wiphy, struct net_device *dev,

			     u8 *peer, enum nl80211_tdls_operation oper);

include/uapi/linux/nl80211.h

+21 −0
Original line number Diff line number Diff line
@@ -1575,6 +1575,9 @@ enum nl80211_commands { 
 *	advertise values that cannot always be met. In such cases, an attempt

 *	to add a new station entry with @NL80211_CMD_NEW_STATION may fail.

 *

 * @NL80211_ATTR_TDLS_PEER_CAPABILITY: flags for TDLS peer capabilities, u32.

 *	As specified in the &enum nl80211_tdls_peer_capability.

 *

 * @NL80211_ATTR_MAX: highest attribute number currently defined

 * @__NL80211_ATTR_AFTER_LAST: internal use

 */
@@ -1908,6 +1911,8 @@ enum nl80211_attrs { 


	NL80211_ATTR_MAX_AP_ASSOC_STA,



	NL80211_ATTR_TDLS_PEER_CAPABILITY,



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



	__NL80211_ATTR_AFTER_LAST,
@@ -4074,4 +4079,20 @@ struct nl80211_vendor_cmd_info { 
	__u32 subcmd;

};



/**

 * enum nl80211_tdls_peer_capability - TDLS peer flags.

 *

 * Used by tdls_mgmt() to determine which conditional elements need

 * to be added to TDLS Setup frames.

 *

 * @NL80211_TDLS_PEER_HT: TDLS peer is HT capable.

 * @NL80211_TDLS_PEER_VHT: TDLS peer is VHT capable.

 * @NL80211_TDLS_PEER_WMM: TDLS peer is WMM capable.

 */

enum nl80211_tdls_peer_capability {

	NL80211_TDLS_PEER_HT = 1<<0,

	NL80211_TDLS_PEER_VHT = 1<<1,

	NL80211_TDLS_PEER_WMM = 1<<2,

};



#endif /* __LINUX_NL80211_H */

net/mac80211/cfg.c

+2 −2
Original line number Diff line number Diff line
@@ -3644,8 +3644,8 @@ ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, 


static int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,

			       u8 *peer, u8 action_code, u8 dialog_token,

			       u16 status_code, const u8 *extra_ies,

			       size_t extra_ies_len)

			       u16 status_code, u32 peer_capability,

			       const u8 *extra_ies, size_t extra_ies_len)

{

	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

	struct ieee80211_local *local = sdata->local;

net/wireless/nl80211.c

+6 −1
Original line number Diff line number Diff line
@@ -384,6 +384,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = { 
				   .len = IEEE80211_QOS_MAP_LEN_MAX },

	[NL80211_ATTR_MAC_HINT] = { .len = ETH_ALEN },

	[NL80211_ATTR_WIPHY_FREQ_HINT] = { .type = NLA_U32 },

	[NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },

};



/* policy for the key attributes */
@@ -7269,6 +7270,7 @@ static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info) 
	struct cfg80211_registered_device *rdev = info->user_ptr[0];

	struct net_device *dev = info->user_ptr[1];

	u8 action_code, dialog_token;

	u32 peer_capability = 0;

	u16 status_code;

	u8 *peer;
@@ -7287,9 +7289,12 @@ static int nl80211_tdls_mgmt(struct sk_buff *skb, struct genl_info *info) 
	action_code = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_ACTION]);

	status_code = nla_get_u16(info->attrs[NL80211_ATTR_STATUS_CODE]);

	dialog_token = nla_get_u8(info->attrs[NL80211_ATTR_TDLS_DIALOG_TOKEN]);

	if (info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY])

		peer_capability =

			nla_get_u32(info->attrs[NL80211_ATTR_TDLS_PEER_CAPABILITY]);



	return rdev_tdls_mgmt(rdev, dev, peer, action_code,

			      dialog_token, status_code,

			      dialog_token, status_code, peer_capability,

			      nla_data(info->attrs[NL80211_ATTR_IE]),

			      nla_len(info->attrs[NL80211_ATTR_IE]));

}

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