Commit a42e59eb authored by Veerendranath Jakkam's avatar Veerendranath Jakkam Committed by Johannes Berg
Browse files

wifi: cfg80211: Extend cfg80211_new_sta() for MLD AP 



Add support for drivers to indicate STA connection(MLO/non-MLO) when
user space SME (e.g., hostapd) is not used for MLD AP.

Add new parameters in struct station_info to provide below information
in cfg80211_new_sta() call:
- MLO link ID of the AP, with which station completed (re)association.
  This is applicable for both MLO and non-MLO station connections when
  the AP affiliated with an MLD.
- Station's MLD address if the connection is MLO capable.
- (Re)Association Response IEs sent to the station. User space needs
  this to determine rejected and accepted affiliated links information
  of the connected station if the connection is MLO capable.

Signed-off-by: default avatarVeerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20230126143256.960563-2-quic_vjakkam@quicinc.com


Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 92881884

include/net/cfg80211.h

+24 −0
Original line number Diff line number Diff line
@@ -1876,6 +1876,24 @@ struct cfg80211_tid_stats { 
 *	received packet with an FCS error matches the peer MAC address.

 * @airtime_link_metric: mesh airtime link metric.

 * @connected_to_as: true if mesh STA has a path to authentication server

 * @mlo_params_valid: Indicates @assoc_link_id and @mld_addr fields are filled

 *	by driver. Drivers use this only in cfg80211_new_sta() calls when AP

 *	MLD's MLME/SME is offload to driver. Drivers won't fill this

 *	information in cfg80211_del_sta_sinfo(), get_station() and

 *	dump_station() callbacks.

 * @assoc_link_id: Indicates MLO link ID of the AP, with which the station

 *	completed (re)association. This information filled for both MLO

 *	and non-MLO STA connections when the AP affiliated with an MLD.

 * @mld_addr: For MLO STA connection, filled with MLD address of the station.

 *	For non-MLO STA connection, filled with all zeros.

 * @assoc_resp_ies: IEs from (Re)Association Response.

 *	This is used only when in AP mode with drivers that do not use user

 *	space MLME/SME implementation. The information is provided only for the

 *	cfg80211_new_sta() calls to notify user space of the IEs. Drivers won't

 *	fill this information in cfg80211_del_sta_sinfo(), get_station() and

 *	dump_station() callbacks. User space needs this information to determine

 *	the accepted and rejected affiliated links of the connected station.

 * @assoc_resp_ies_len: Length of @assoc_resp_ies buffer in octets.

 */

struct station_info {

	u64 filled;
@@ -1935,6 +1953,12 @@ struct station_info { 
	u32 airtime_link_metric;



	u8 connected_to_as;



	bool mlo_params_valid;

	u8 assoc_link_id;

	u8 mld_addr[ETH_ALEN] __aligned(2);

	const u8 *assoc_resp_ies;

	size_t assoc_resp_ies_len;

};



/**

net/wireless/nl80211.c

+16 −0
Original line number Diff line number Diff line
@@ -6527,6 +6527,22 @@ static int nl80211_send_station(struct sk_buff *msg, u32 cmd, u32 portid, 
		    sinfo->assoc_req_ies))

		goto nla_put_failure;









	if (sinfo->assoc_resp_ies_len &&









	    nla_put(msg, NL80211_ATTR_RESP_IE, sinfo->assoc_resp_ies_len,









		    sinfo->assoc_resp_ies))









		goto nla_put_failure;

















	if (sinfo->mlo_params_valid) {









		if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID,









			       sinfo->assoc_link_id))









			goto nla_put_failure;

















		if (!is_zero_ether_addr(sinfo->mld_addr) &&









		    nla_put(msg, NL80211_ATTR_MLD_ADDR, ETH_ALEN,









			    sinfo->mld_addr))









			goto nla_put_failure;









	}

















	cfg80211_sinfo_release_content(sinfo);









	genlmsg_end(msg, hdr);









	return 0;