Allow hostapd to advertise 40 MHz intolerant HT capability

ht_capab=[40-INTOLERANT] can now be used to advertise that the BSS is 40
MHz intolerant to prevent other 20/40 MHz co-ex compliant APs from using
40 MHz channel bandwidth.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

hostapd/config_file.c

@@ -1067,6 +1067,8 @@ static int hostapd_config_ht_capab(struct hostapd_config *conf,
 		conf->ht_capab |= HT_CAP_INFO_DSSS_CCK40MHZ;
 	if (os_strstr(capab, "[PSMP]"))
 		conf->ht_capab |= HT_CAP_INFO_PSMP_SUPP;
+	if (os_strstr(capab, "[40-INTOLERANT]"))
+		conf->ht_capab |= HT_CAP_INFO_40MHZ_INTOLERANT;
 	if (os_strstr(capab, "[LSIG-TXOP-PROT]"))
 		conf->ht_capab |= HT_CAP_INFO_LSIG_TXOP_PROTECT_SUPPORT;
 

hostapd/hostapd.conf

@@ -481,6 +481,7 @@ wmm_ac_vo_acm=0
 #	set)
 # DSSS/CCK Mode in 40 MHz: [DSSS_CCK-40] = allowed (not allowed if not set)
 # PSMP support: [PSMP] (disabled if not set)
+# 40 MHz intolerant [40-INTOLERANT] (not advertised if not set)
 # L-SIG TXOP protection support: [LSIG-TXOP-PROT] (disabled if not set)
 #ht_capab=[HT40-][SHORT-GI-20][SHORT-GI-40]