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@xxxxxxxxxxx>
---
v2:
- Add more detailed commit text and documentation.
---
include/net/cfg80211.h | 24 ++++++++++++++++++++++++
net/wireless/nl80211.c | 16 ++++++++++++++++
2 files changed, 40 insertions(+)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 54a77d906b2d..5686e64e13d1 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -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;
};
/**
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 64cf6110ce9d..d7324f6370ff 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;
--
2.25.1
