recipes-wifi/hostapd/files/patches-2.10.3/0089-mtk-hostapd-Handle-DFS-radar-detection-in-MLO.patch

From a0cbcd04400458bf7f4f4086beecbf8db6800c36 Mon Sep 17 00:00:00 2001
From: StanleyYP Wang <StanleyYP.Wang@mediatek.com>
Date: Fri, 19 Jan 2024 14:11:05 +0800
Subject: [PATCH 089/104] mtk: hostapd: Handle DFS radar detection in MLO

To handle DFS CAC in MLO, we add the following changes:
1. Add link id info to radar detect cmd for the kernel to use the correct link.
2. Block RNR IE for disabled iface. (the EID len would be wrong without it)
3. Only flush the old stations for the first BSS; otherwise, after DFS CAC
stations would be flushed again.

Signed-off-by: StanleyYP Wang <StanleyYP.Wang@mediatek.com>

Add background radar handling

Signed-off-by: StanleyYP Wang <StanleyYP.Wang@mediatek.com>
---
 src/ap/ap_drv_ops.c                |  9 +++++++++
 src/ap/hostapd.c                   |  3 +++
 src/ap/ieee802_11.c                |  3 +++
 src/drivers/driver_nl80211.c       | 18 ++++++++++++++++++
 src/drivers/driver_nl80211.h       |  1 +
 src/drivers/driver_nl80211_event.c |  3 ++-
 6 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/src/ap/ap_drv_ops.c b/src/ap/ap_drv_ops.c
index ac7ef00cd..9357ce7b6 100644
--- a/src/ap/ap_drv_ops.c
+++ b/src/ap/ap_drv_ops.c
@@ -1012,6 +1012,15 @@ int hostapd_start_dfs_cac(struct hostapd_iface *iface,
 		return -1;
 	}
 	data.radar_background = radar_background;
+	data.link_id = -1;
+
+#ifdef CONFIG_IEEE80211BE
+	if (hapd->conf->mld_ap) {
+		data.link_id = hapd->mld_link_id;
+		wpa_printf(MSG_DEBUG,
+			   "hostapd_start_dfs_cac: link_id=%d", data.link_id);
+	}
+#endif /* CONFIG_IEEE80211BE */
 
 	res = hapd->driver->start_dfs_cac(hapd->drv_priv, &data);
 	if (!res) {
diff --git a/src/ap/hostapd.c b/src/ap/hostapd.c
index f8b05de45..8e3f0b281 100644
--- a/src/ap/hostapd.c
+++ b/src/ap/hostapd.c
@@ -1371,6 +1371,9 @@ int hostapd_setup_bss(struct hostapd_data *hapd, int first, bool start_beacon)
 	if (!hostapd_mld_is_first_bss(hapd))
 		wpa_printf(MSG_DEBUG,
 			   "MLD: %s: Setting non-first BSS", __func__);
+	else
+		/* Only flush old stations when setting up first BSS for MLD. */
+		flush_old_stations = 0;
 
 	wpa_printf(MSG_DEBUG, "%s(hapd=%p (%s), first=%d)",
 		   __func__, hapd, conf->iface, first);
diff --git a/src/ap/ieee802_11.c b/src/ap/ieee802_11.c
index 0f357d786..fe0a5bce4 100644
--- a/src/ap/ieee802_11.c
+++ b/src/ap/ieee802_11.c
@@ -7852,6 +7852,9 @@ u8 *hostapd_eid_rnr_colocation(struct hostapd_data *hapd, u8 *eid,
 		    !is_6ghz_op_class(iface->conf->op_class))
 			continue;
 
+		if (!iface->bss[0]->started)
+			continue;
+
 		eid = hostapd_eid_rnr_iface(iface->bss[0], hapd, eid,
 					    current_len, NULL, false);
 	}
diff --git a/src/drivers/driver_nl80211.c b/src/drivers/driver_nl80211.c
index 17aaa16a8..ad73b4ac1 100644
--- a/src/drivers/driver_nl80211.c
+++ b/src/drivers/driver_nl80211.c
@@ -10589,6 +10589,24 @@ static int nl80211_start_radar_detection(void *priv,
 		return -1;
 	}
 
+	if (freq->link_id != NL80211_DRV_LINK_ID_NA) {
+		wpa_printf(MSG_DEBUG, "nl80211: Set link_id=%u for radar detect",
+			   freq->link_id);
+
+		if (nla_put_u8(msg, NL80211_ATTR_MLO_LINK_ID, freq->link_id)) {
+			nlmsg_free(msg);
+			return -ENOBUFS;
+		}
+
+		if (freq->radar_background) {
+			struct i802_link *link = nl80211_get_link(bss, freq->link_id);
+
+			link->background_freq = freq->freq;
+		} else {
+			nl80211_link_set_freq(bss, freq->link_id, freq->freq);
+		}
+	}
+
 	ret = send_and_recv_cmd(drv, msg);
 	if (ret == 0)
 		return 0;
diff --git a/src/drivers/driver_nl80211.h b/src/drivers/driver_nl80211.h
index 9866c221c..a0a62e536 100644
--- a/src/drivers/driver_nl80211.h
+++ b/src/drivers/driver_nl80211.h
@@ -56,6 +56,7 @@ struct i802_link {
 	unsigned int beacon_set:1;
 
 	int freq;
+	int background_freq;
 	int bandwidth;
 	u8 addr[ETH_ALEN];
 	void *ctx;
diff --git a/src/drivers/driver_nl80211_event.c b/src/drivers/driver_nl80211_event.c
index 90084356d..03bad4bb3 100644
--- a/src/drivers/driver_nl80211_event.c
+++ b/src/drivers/driver_nl80211_event.c
@@ -1631,7 +1631,8 @@ nl80211_get_link_id_by_freq(struct i802_bss *bss, unsigned int freq)
 	unsigned int i;
 
 	for_each_link(bss->valid_links, i) {
-		if ((unsigned int) bss->links[i].freq == freq)
+		if ((unsigned int) bss->links[i].freq == freq ||
+		    (unsigned int) bss->links[i].background_freq == freq)
 			return i;
 	}
 
-- 
2.39.2