From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Date: Tue, 28 Sep 2021 23:42:58 +0000 (-0700)
Subject: gatt: Emit PropertiesChanged("MTU") when MTU is exchanged
X-Git-Tag: submit/tizen/20220313.220938~119
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ee7c638a69486dfef6bbcef98d3a893f202488fe;p=platform%2Fupstream%2Fbluez.git

gatt: Emit PropertiesChanged("MTU") when MTU is exchanged

This notifies client when the ATT MTU changes.

Signed-off-by: Anuj Jain <anuj01.jain@samsung.com>
Signed-off-by: Ayush Garg <ayush.garg@samsung.com>
---

diff --git a/src/gatt-client.c b/src/gatt-client.c
index 64227e23..229b82fa 100644
--- a/src/gatt-client.c
+++ b/src/gatt-client.c
@@ -111,6 +111,7 @@ struct characteristic {
 	char *path;
 
 	unsigned int ready_id;
+	unsigned int exchange_id;
 	struct sock_io *write_io;
 	struct sock_io *notify_io;
 
@@ -1948,6 +1949,8 @@ static const GDBusSignalTable characteristic_signals[] = {
 static void characteristic_free(void *data)
 {
 	struct characteristic *chrc = data;
+	struct bt_gatt_client *gatt = chrc->service->client->gatt;
+	struct bt_att *att;
 
 	/* List should be empty here */
 	queue_destroy(chrc->descs, NULL);
@@ -1964,15 +1967,29 @@ static void characteristic_free(void *data)
 
 	queue_destroy(chrc->notify_clients, remove_client);
 
+	att = bt_gatt_client_get_att(gatt);
+	if (att)
+		bt_att_unregister_exchange(att, chrc->exchange_id);
+
 	g_free(chrc->path);
 	free(chrc);
 }
 
+static void att_exchange(uint16_t mtu, void *user_data)
+{
+	struct characteristic *chrc = user_data;
+
+	g_dbus_emit_property_changed(btd_get_dbus_connection(), chrc->path,
+					GATT_CHARACTERISTIC_IFACE, "MTU");
+}
+
 static struct characteristic *characteristic_create(
 						struct gatt_db_attribute *attr,
 						struct service *service)
 {
 	struct characteristic *chrc;
+	struct bt_gatt_client *gatt = service->client->gatt;
+	struct bt_att *att;
 	bt_uuid_t uuid;
 
 	chrc = new0(struct characteristic, 1);
@@ -2028,6 +2045,11 @@ static struct characteristic *characteristic_create(
 		return NULL;
 	}
 
+	att = bt_gatt_client_get_att(gatt);
+	if (att)
+		chrc->exchange_id = bt_att_register_exchange(att, att_exchange,
+								chrc, NULL);
+
 	DBG("Exported GATT characteristic: %s", chrc->path);
 
 	return chrc;