hostapd: randomize default BSS color

In case no specific BSS color is configured, set it to a random value.

Signed-off-by: David Bauer <[email protected]>
Tested-by: Stijn Tintel <[email protected]>

package/kernel/mac80211/files/lib/netifd/wireless/mac80211.sh

@@ -419,12 +419,14 @@ mac80211_hostapd_setup_base() {
 		he_mac_cap=${he_mac_cap:2}
 
 		append base_cfg "ieee80211ax=1" "$N"
-		[ -n "$he_bss_color" ] && append base_cfg "he_bss_color=$he_bss_color" "$N"
 		[ "$hwmode" = "a" ] && {
 			append base_cfg "he_oper_chwidth=$vht_oper_chwidth" "$N"
 			append base_cfg "he_oper_centr_freq_seg0_idx=$vht_center_seg0" "$N"
 		}
 
+		set_default he_bss_color 128
+		append base_cfg "he_bss_color=$he_bss_color" "$N"
+
 		mac80211_add_he_capabilities \
 			he_su_beamformer:${he_phy_cap:6:2}:0x80:$he_su_beamformer \
 			he_su_beamformee:${he_phy_cap:8:2}:0x1:$he_su_beamformee \

package/network/services/hostapd/patches/465-hostapd-config-support-random-BSS-color.patch

@@ -0,0 +1,24 @@
+From c9304d3303d563ad6d2619f4e07864ed12f96889 Mon Sep 17 00:00:00 2001
+From: David Bauer <[email protected]>
+Date: Sat, 14 May 2022 21:41:03 +0200
+Subject: [PATCH] hostapd: config: support random BSS color
+
+Configure the HE BSS color to a random value in case the config defines
+a BSS color which exceeds the max BSS color (63).
+
+Signed-off-by: David Bauer <[email protected]>
+---
+ hostapd/config_file.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/hostapd/config_file.c
++++ b/hostapd/config_file.c
+@@ -3485,6 +3485,8 @@ static int hostapd_config_fill(struct ho
+ 	} else if (os_strcmp(buf, "he_bss_color") == 0) {
+ 		conf->he_op.he_bss_color = atoi(pos) & 0x3f;
+ 		conf->he_op.he_bss_color_disabled = 0;
++		if (atoi(pos) > 63)
++			conf->he_op.he_bss_color = os_random() % 63 + 1;
+ 	} else if (os_strcmp(buf, "he_bss_color_partial") == 0) {
+ 		conf->he_op.he_bss_color_partial = atoi(pos);
+ 	} else if (os_strcmp(buf, "he_default_pe_duration") == 0) {

package/network/services/hostapd/patches/750-qos_map_set_without_interworking.patch

@@ -18,7 +18,7 @@
  
  #ifdef CONFIG_HS20
  static int hs20_parse_conn_capab(struct hostapd_bss_config *bss, char *buf,
-@@ -4040,10 +4040,10 @@ static int hostapd_config_fill(struct ho
+@@ -4042,10 +4042,10 @@ static int hostapd_config_fill(struct ho
  		bss->gas_frag_limit = val;
  	} else if (os_strcmp(buf, "gas_comeback_delay") == 0) {
  		bss->gas_comeback_delay = atoi(pos);