Testing functionality for airtime policy

Add a new testing parameter to allow airtime policy implementation to be
tested for more coverage even without kernel driver support.

Signed-off-by: Jouni Malinen <j@w1.fi>

hostapd/ctrl_iface.c

@@ -1469,6 +1469,8 @@ static int hostapd_ctrl_iface_set(struct hostapd_data *hapd, char *cmd)
 		hapd->ext_mgmt_frame_handling = atoi(value);
 	} else if (os_strcasecmp(cmd, "ext_eapol_frame_io") == 0) {
 		hapd->ext_eapol_frame_io = atoi(value);
+	} else if (os_strcasecmp(cmd, "force_backlog_bytes") == 0) {
+		hapd->force_backlog_bytes = atoi(value);
 #ifdef CONFIG_DPP
 	} else if (os_strcasecmp(cmd, "dpp_config_obj_override") == 0) {
 		os_free(hapd->dpp_config_obj_override);

src/ap/airtime_policy.c

@@ -79,6 +79,10 @@ static void count_backlogged_sta(struct hostapd_data *hapd)
 	for (sta = hapd->sta_list; sta; sta = sta->next) {
 		if (hostapd_drv_read_sta_data(hapd, &data, sta->addr))
 			continue;
+#ifdef CONFIG_TESTING_OPTIONS
+		if (hapd->force_backlog_bytes)
+			data.backlog_bytes = 1;
+#endif /* CONFIG_TESTING_OPTIONS */
 
 		if (data.backlog_bytes > 0)
 			set_new_backlog_time(hapd, sta, &now);

src/ap/hostapd.h

@@ -354,6 +354,8 @@ struct hostapd_data {
 	int last_bigtk_key_idx;
 	u8 last_bigtk[WPA_BIGTK_MAX_LEN];
 	size_t last_bigtk_len;
+
+	bool force_backlog_bytes;
 #endif /* CONFIG_TESTING_OPTIONS */
 
 #ifdef CONFIG_MBO