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: Veerendranath Jakkam <quic_vjakkam@quicinc.com>
Link: https://lore.kernel.org/r/20230126143256.960563-2-quic_vjakkam@quicinc.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index a0858d747e45..caf716c3afaf 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -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;