Allow sched_scan_plans to be updated at runtime

This allows the control interface SET command to be used to update the
sched_scan_plans parameter at runtime. In addition, an empty string can
be used to clear the previously configured plan.

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

wpa_supplicant/config.c

@@ -4260,7 +4260,7 @@ static const struct global_parse_data global_fields[] = {
 	{ INT_RANGE(fst_llt, 1, FST_MAX_LLT_MS), 0 },
 #endif /* CONFIG_FST */
 	{ INT_RANGE(wpa_rsc_relaxation, 0, 1), 0 },
-	{ STR(sched_scan_plans), 0 },
+	{ STR(sched_scan_plans), CFG_CHANGED_SCHED_SCAN_PLANS },
 };
 
 #undef FUNC

wpa_supplicant/config.h

@@ -332,6 +332,7 @@ struct wpa_cred {
 #define CFG_CHANGED_EXT_PW_BACKEND BIT(14)
 #define CFG_CHANGED_NFC_PASSWORD_TOKEN BIT(15)
 #define CFG_CHANGED_P2P_PASSPHRASE_LEN BIT(16)
+#define CFG_CHANGED_SCHED_SCAN_PLANS BIT(17)
 
 /**
  * struct wpa_config - wpa_supplicant configuration data

wpa_supplicant/scan.c

@@ -2548,6 +2548,14 @@ int wpas_sched_scan_plans_set(struct wpa_supplicant *wpa_s, const char *cmd)
 	if (!cmd)
 		return -1;
 
+	if (!cmd[0]) {
+		wpa_printf(MSG_DEBUG, "Clear sched scan plans");
+		os_free(wpa_s->sched_scan_plans);
+		wpa_s->sched_scan_plans = NULL;
+		wpa_s->sched_scan_plans_num = 0;
+		return 0;
+	}
+
 	while ((token = cstr_token(cmd, " ", &context))) {
 		int ret;
 		struct sched_scan_plan *scan_plan, *n;

wpa_supplicant/wpa_supplicant.c

@@ -5314,6 +5314,9 @@ void wpa_supplicant_update_config(struct wpa_supplicant *wpa_s)
 	if (wpa_s->conf->changed_parameters & CFG_CHANGED_EXT_PW_BACKEND)
 		wpas_init_ext_pw(wpa_s);
 
+	if (wpa_s->conf->changed_parameters & CFG_CHANGED_SCHED_SCAN_PLANS)
+		wpas_sched_scan_plans_set(wpa_s, wpa_s->conf->sched_scan_plans);
+
 #ifdef CONFIG_WPS
 	wpas_wps_update_config(wpa_s);
 #endif /* CONFIG_WPS */