[PATCH 1/6] nl80211: Add support for NL80211_ATTR_FRAME_CMD_NO_STA attribute
Ramasamy Kaliappan
ramasamy.kaliappan at oss.qualcomm.com
Thu Aug 6 09:31:42 PDT 2026
Add support for the new NL80211_ATTR_FRAME_CMD_NO_STA attribute in
nl80211 driver handling. This attribute indicates that the kernel
did not have a station entry for a received management frame or that
frame transmission should avoid using an existing station entry.
Expose this information to upper layers using the new
rx_mgmt.no_sta flag, allowing hostapd to determine whether
MLD address translation was applied or whether it should
be disabled when transmitting a frame.
Signed-off-by: Ramasamy Kaliappan <ramasamy.kaliappan at oss.qualcomm.com>
---
src/ap/drv_callbacks.c | 1 +
src/ap/hostapd.h | 1 +
src/drivers/driver.h | 5 +++++
src/drivers/driver_nl80211_event.c | 27 ++++++++++++++++++---------
4 files changed, 25 insertions(+), 9 deletions(-)
diff --git a/src/ap/drv_callbacks.c b/src/ap/drv_callbacks.c
index 116a055033a0..2c59a662d908 100644
--- a/src/ap/drv_callbacks.c
+++ b/src/ap/drv_callbacks.c
@@ -2025,6 +2025,7 @@ static int hostapd_mgmt_rx(struct hostapd_data *hapd, struct rx_mgmt *rx_mgmt)
fi.freq = rx_mgmt->freq;
fi.datarate = rx_mgmt->datarate;
fi.ssi_signal = rx_mgmt->ssi_signal;
+ fi.no_sta = rx_mgmt->no_sta;
if (hapd == HAPD_BROADCAST) {
size_t i;
diff --git a/src/ap/hostapd.h b/src/ap/hostapd.h
index 974964d341e9..a0f569e8417e 100644
--- a/src/ap/hostapd.h
+++ b/src/ap/hostapd.h
@@ -132,6 +132,7 @@ struct hostapd_frame_info {
u32 channel;
u32 datarate;
int ssi_signal; /* dBm */
+ bool no_sta;
};
enum wps_status {
diff --git a/src/drivers/driver.h b/src/drivers/driver.h
index e790120467be..7284d863d2e4 100644
--- a/src/drivers/driver.h
+++ b/src/drivers/driver.h
@@ -7272,6 +7272,11 @@ union wpa_event_data {
* non MLD.
*/
int link_id;
+ /**
+ * no_sta - set when the kernel has no corresponding station entry
+ * for the received frame.
+ */
+ bool no_sta;
} rx_mgmt;
/**
diff --git a/src/drivers/driver_nl80211_event.c b/src/drivers/driver_nl80211_event.c
index 0b111bf66bda..9204756f9251 100644
--- a/src/drivers/driver_nl80211_event.c
+++ b/src/drivers/driver_nl80211_event.c
@@ -1428,7 +1428,8 @@ static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
static void mlme_event_mgmt(struct i802_bss *bss,
struct nlattr *freq, struct nlattr *sig,
const u8 *frame, size_t len,
- int link_id)
+ int link_id,
+ bool no_sta)
{
struct wpa_driver_nl80211_data *drv = bss->drv;
const struct ieee80211_mgmt *mgmt;
@@ -1457,17 +1458,19 @@ static void mlme_event_mgmt(struct i802_bss *bss,
}
wpa_printf(MSG_DEBUG,
"nl80211: RX frame da=" MACSTR " sa=" MACSTR " bssid=" MACSTR
- " freq=%d ssi_signal=%d fc=0x%x seq_ctrl=0x%x stype=%u (%s) len=%u",
+ " freq=%d ssi_signal=%d fc=0x%x seq_ctrl=0x%x stype=%u (%s) len=%u"
+ " no_sta=%d",
MAC2STR(mgmt->da), MAC2STR(mgmt->sa), MAC2STR(mgmt->bssid),
rx_freq, ssi_signal, fc,
le_to_host16(mgmt->seq_ctrl), stype, fc2str(fc),
- (unsigned int) len);
+ (unsigned int) len, no_sta);
event.rx_mgmt.frame = frame;
event.rx_mgmt.frame_len = len;
event.rx_mgmt.ssi_signal = ssi_signal;
event.rx_mgmt.drv_priv = bss;
event.rx_mgmt.ctx = bss->ctx;
event.rx_mgmt.link_id = link_id;
+ event.rx_mgmt.no_sta = no_sta;
wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
}
@@ -1847,7 +1850,8 @@ static void mlme_event(struct i802_bss *bss,
struct nlattr *freq, struct nlattr *ack,
struct nlattr *cookie, struct nlattr *sig,
struct nlattr *wmm, struct nlattr *req_ie,
- struct nlattr *link)
+ struct nlattr *link,
+ struct nlattr *drv_no_sta)
{
struct wpa_driver_nl80211_data *drv = bss->drv;
u16 stype = 0, auth_type = 0;
@@ -1856,6 +1860,7 @@ static void mlme_event(struct i802_bss *bss,
int link_id = -1;
struct i802_link *mld_link = NULL;
const struct ieee80211_mgmt *mgmt = NULL;
+ bool no_sta;
if (timed_out && addr) {
mlme_timeout_event(drv, cmd, addr);
@@ -1879,6 +1884,8 @@ static void mlme_event(struct i802_bss *bss,
if (nl80211_link_valid(bss->valid_links, link_id))
mld_link = nl80211_get_link(bss, link_id);
+ no_sta = nla_get_flag(drv_no_sta);
+
data = nla_data(frame);
len = nla_len(frame);
if (len < 4 + 2 * ETH_ALEN) {
@@ -1889,10 +1896,10 @@ static void mlme_event(struct i802_bss *bss,
return;
}
wpa_printf(MSG_MSGDUMP, "nl80211: MLME event %d (%s) on %s(" MACSTR
- ") A1=" MACSTR " A2=" MACSTR " on link_id=%d", cmd,
+ ") A1=" MACSTR " A2=" MACSTR " on link_id=%d no_sta=%d", cmd,
nl80211_command_to_string(cmd), bss->ifname,
MAC2STR(bss->addr), MAC2STR(data + 4),
- MAC2STR(data + 4 + ETH_ALEN), link_id);
+ MAC2STR(data + 4 + ETH_ALEN), link_id, no_sta);
/* PASN Authentication frame can be received with a different source MAC
* address. Allow NL80211_CMD_FRAME event with foreign addresses also.
@@ -1962,7 +1969,7 @@ static void mlme_event(struct i802_bss *bss,
break;
case NL80211_CMD_FRAME:
mlme_event_mgmt(bss, freq, sig, nla_data(frame),
- nla_len(frame), link_id);
+ nla_len(frame), link_id, no_sta);
break;
case NL80211_CMD_FRAME_TX_STATUS:
mlme_event_mgmt_tx_status(bss, cookie, nla_data(frame),
@@ -4940,7 +4947,8 @@ static void do_process_drv_event(struct i802_bss *bss, int cmd,
tb[NL80211_ATTR_RX_SIGNAL_DBM],
tb[NL80211_ATTR_STA_WME],
tb[NL80211_ATTR_REQ_IE],
- tb[NL80211_ATTR_MLO_LINK_ID]);
+ tb[NL80211_ATTR_MLO_LINK_ID],
+ tb[NL80211_ATTR_FRAME_CMD_NO_STA]);
break;
case NL80211_CMD_CONNECT:
case NL80211_CMD_ROAM:
@@ -5332,7 +5340,8 @@ int process_bss_event(struct nl_msg *msg, void *arg)
tb[NL80211_ATTR_COOKIE],
tb[NL80211_ATTR_RX_SIGNAL_DBM],
tb[NL80211_ATTR_STA_WME], NULL,
- tb[NL80211_ATTR_MLO_LINK_ID]);
+ tb[NL80211_ATTR_MLO_LINK_ID],
+ tb[NL80211_ATTR_FRAME_CMD_NO_STA]);
break;
case NL80211_CMD_UNEXPECTED_FRAME:
nl80211_spurious_frame(bss, tb, 0);
--
2.34.1
More information about the Hostap
mailing list