hostapd: Supply default parameters for OBSS scan

For some client OBSS implementations that are performed in
firmware, all OBSS parameters need to be set to valid values.
Do this, as well as supplying the "20/40 Coex Mgmt Support"
flag in the extended capabilities IE.

Signed-hostap: Paul Stewart <pstew@chromium.org>

src/ap/ieee802_11_ht.c

@@ -54,7 +54,20 @@ u8 * hostapd_eid_ht_capabilities(struct hostapd_data *hapd, u8 *eid)
 		scan_params->width_trigger_scan_interval =
 			host_to_le16(hapd->iconf->obss_interval);
 
-		/* TODO: Fill in more parameters (supplicant ignores them) */
+		/* Fill in default values for remaining parameters
+		 * (IEEE Std 802.11-2012, 8.4.2.61 and MIB defval) */
+		scan_params->scan_passive_dwell =
+			host_to_le16(20);
+		scan_params->scan_active_dwell =
+			host_to_le16(10);
+		scan_params->scan_passive_total_per_channel =
+			host_to_le16(200);
+		scan_params->scan_active_total_per_channel =
+			host_to_le16(20);
+		scan_params->channel_transition_delay_factor =
+			host_to_le16(5);
+		scan_params->scan_activity_threshold =
+			host_to_le16(25);
 
 		pos += sizeof(*scan_params);
 	}

src/ap/ieee802_11_shared.c

@@ -170,6 +170,8 @@ static void hostapd_ext_capab_byte(struct hostapd_data *hapd, u8 *pos, int idx)
 
 	switch (idx) {
 	case 0: /* Bits 0-7 */
+		if (hapd->iconf->obss_interval)
+			*pos |= 0x01; /* Bit 0 - Coexistence management */
 		break;
 	case 1: /* Bits 8-15 */
 		break;
@@ -223,6 +225,8 @@ u8 * hostapd_eid_ext_capab(struct hostapd_data *hapd, u8 *eid)
 		len = 4;
 	if (len < 3 && hapd->conf->wnm_sleep_mode)
 		len = 3;
+	if (len < 1 && hapd->iconf->obss_interval)
+		len = 1;
 	if (len < 7 && hapd->conf->ssid.utf8_ssid)
 		len = 7;
 #ifdef CONFIG_WNM