confd: wifi: Update wpa_supplicant config when wifi setting change

For example changing SSID

src/confd/src/if-wifi.c

@@ -14,18 +14,15 @@
 
 #define WPA_SUPPLICANT_CONF      "/etc/wpa_supplicant-%s.conf"
 
-/*
- * Determine WiFi mode from YANG configuration
- */
-typedef enum wifi_mode_t {
-	wifi_station,
-	wifi_ap,
-	wifi_unknown
-} wifi_mode_t;
 
-static wifi_mode_t wifi_get_mode(struct lyd_node *wifi)
+wifi_mode_t wifi_get_mode(struct lyd_node *iface)
 {
-	struct lyd_node *ap;
+	struct lyd_node *ap, *wifi;
+
+	wifi = lydx_get_child(iface, "wifi");
+	if (!wifi)
+		return wifi_unknown;
+
 
 	ap = lydx_get_child(wifi, "access-point");
 	if (ap) {
@@ -60,7 +57,7 @@ int wifi_mode_changed(struct lyd_node *wifi)
 /*
  * Generate wpa_supplicant config for station mode
  */
-static int wifi_gen_station(struct lyd_node *cif)
+int wifi_gen_station(struct lyd_node *cif)
 {
 	const char *ifname, *ssid, *secret_name, *secret, *security_mode, *radio;
 	struct lyd_node *security, *secret_node, *radio_node, *station, *wifi;
@@ -213,7 +210,7 @@ int wifi_add_iface(struct lyd_node *cif, struct dagger *net)
 		return SR_ERR_INTERNAL;
 	}
 
-	mode = wifi_get_mode(wifi);
+	mode = wifi_get_mode(cif);
 	probe_timeout = wifi_get_probe_timeout(net->session, radio);
 
 	fprintf(iw, "# Generated by Infix confd - WiFi Interface Creation\n");

src/confd/src/interfaces.c

@@ -452,9 +452,8 @@ static int netdag_gen_afspec_set(sr_session_ctx_t *session, struct dagger *net,
 	case IFT_ETH:
 		return netdag_gen_ethtool(net, cif, dif);
 	case IFT_WIFI:
-		/* WiFi daemon config (hostapd/wpa_supplicant) is handled by
-		 * hardware.c when the radio (phy) is configured. Interface
-		 * creation/deletion is handled in netdag_gen_afspec_add(). */
+		if (wifi_get_mode(cif) == wifi_station)
+			return wifi_gen_station(cif);
 		return 0;
 	case IFT_DUMMY:
 	case IFT_GRE:

src/confd/src/interfaces.h

@@ -124,9 +124,17 @@ int bridge_mcd_gen(struct lyd_node *cifs);
 int bridge_port_gen(struct lyd_node *dif, struct lyd_node *cif, FILE *ip);
 
 /* if-wifi.c */
+typedef enum wifi_mode_t {
+	wifi_station,
+	wifi_ap,
+	wifi_unknown
+} wifi_mode_t;
+
 int wifi_add_iface(struct lyd_node *cif, struct dagger *net);
 int wifi_del_iface(struct lyd_node *dif, struct dagger *net);
 int wifi_mode_changed(struct lyd_node *wifi);
+int wifi_gen_station(struct lyd_node *cif);
+wifi_mode_t wifi_get_mode(struct lyd_node *wifi);
 
 /* if-gre.c */
 int gre_gen(struct lyd_node *dif, struct lyd_node *cif, FILE *ip);