Interworking: Add ctrl_iface events on cred block modifications

Following events are now sent to ctrl_iface monitors to indicate if
credential blocks have been added, modified, or removed:

CRED-ADDED <id>
CRED-MODIFIED <id> <field>
CRED-REMOVE <id>

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

src/common/wpa_ctrl.h

@@ -164,6 +164,13 @@ extern "C" {
 #define INTERWORKING_ALREADY_CONNECTED "INTERWORKING-ALREADY-CONNECTED "
 #define INTERWORKING_SELECTED "INTERWORKING-SELECTED "
 
+/* Credential block added; parameters: <id> */
+#define CRED_ADDED "CRED-ADDED "
+/* Credential block modified; parameters: <id> <field> */
+#define CRED_MODIFIED "CRED-MODIFIED "
+/* Credential block removed; parameters: <id> */
+#define CRED_REMOVED "CRED-REMOVED "
+
 #define GAS_RESPONSE_INFO "GAS-RESPONSE-INFO "
 /* parameters: <addr> <dialog_token> <freq> */
 #define GAS_QUERY_START "GAS-QUERY-START "

wpa_supplicant/ctrl_iface.c

@@ -2660,6 +2660,8 @@ static int wpa_supplicant_ctrl_iface_add_cred(struct wpa_supplicant *wpa_s,
 	if (cred == NULL)
 		return -1;
 
+	wpa_msg(wpa_s, MSG_INFO, CRED_ADDED "%d", cred->id);
+
 	ret = os_snprintf(buf, buflen, "%d\n", cred->id);
 	if (ret < 0 || (size_t) ret >= buflen)
 		return -1;
@@ -2672,12 +2674,21 @@ static int wpas_ctrl_remove_cred(struct wpa_supplicant *wpa_s,
 {
 	struct wpa_ssid *ssid;
 	char str[20];
+	int id;
 
-	if (cred == NULL || wpa_config_remove_cred(wpa_s->conf, cred->id) < 0) {
+	if (cred == NULL) {
 		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find cred");
 		return -1;
 	}
 
+	id = cred->id;
+	if (wpa_config_remove_cred(wpa_s->conf, id) < 0) {
+		wpa_printf(MSG_DEBUG, "CTRL_IFACE: Could not find cred");
+		return -1;
+	}
+
+	wpa_msg(wpa_s, MSG_INFO, CRED_REMOVED "%d", id);
+
 	/* Remove any network entry created based on the removed credential */
 	ssid = wpa_s->conf->ssid;
 	while (ssid) {
@@ -2794,6 +2805,8 @@ static int wpa_supplicant_ctrl_iface_set_cred(struct wpa_supplicant *wpa_s,
 		return -1;
 	}
 
+	wpa_msg(wpa_s, MSG_INFO, CRED_MODIFIED "%d %s", cred->id, name);
+
 	return 0;
 }