Invoke MTU changed callback

[Model] All
[BinType] AP
[Customer] OPEN

[Issue#] N/A
[Request] Internal
[Occurence Version] N/A

[Problem] When remote device request mtu exchange,
  mtu changed callback is not invoked on responder
[Cause & Measure] Invoke mtu changed callback
[Checking Method] Request mtu exchange on remote device

[Team] Basic Connection
[Developer] Injun Yang
[Solution company] Samsung
[Change Type] Specification change

Change-Id: Ib9ee0e2c67043cb0384fed59bfc6a2e3e6b467e6
Signed-off-by: Injun Yang <injun.yang@samsung.com>

4 files changed, 66 insertions, 3 deletions

diff --git a/src/device.c b/src/device.c
index 618d5bbf..73ae618c 100644
--- a/src/device.c
+++ b/src/device.c
@@ -6355,6 +6355,20 @@ done:
 	attio_cleanup(device);
 }
 
+#ifdef TIZEN_FEATURE_BLUEZ_MODIFY
+static void att_mtu_changed(uint16_t mtu, void *user_data)
+{
+	struct btd_device *device = user_data;
+
+	DBG("att mtu changed %d", mtu);
+
+	g_dbus_emit_signal(dbus_conn, device->path,
+		DEVICE_INTERFACE, "AttMtuChanged",
+		DBUS_TYPE_UINT16, &mtu,
+		DBUS_TYPE_INVALID);
+}
+#endif
+
 static void register_gatt_services(struct btd_device *device)
 {
 	struct browse_req *req = device->browse;
@@ -6503,6 +6517,15 @@ static void gatt_server_init(struct btd_device *device, struct gatt_db *db)
 		error("Failed to initialize bt_gatt_server");
 
 	bt_gatt_server_set_debug(device->server, gatt_debug, NULL, NULL);
+
+#ifdef TIZEN_FEATURE_BLUEZ_MODIFY
+	if (!bt_gatt_server_set_mtu_changed(device->server,
+						att_mtu_changed,
+						device, NULL)) {
+		DBG("Failed to set mtu changed handler");
+		return;
+	}
+#endif
 }
 
 static bool local_counter(uint32_t *sign_cnt, void *user_data)
diff --git a/src/shared/gatt-client.c b/src/shared/gatt-client.c
index 3c6d7a8a..9f4e075f 100644
--- a/src/shared/gatt-client.c
+++ b/src/shared/gatt-client.c
@@ -1181,7 +1181,7 @@ static void exchange_mtu_cb(bool success, uint8_t att_ecode, void *user_data)
 	}
 
 	util_debug(client->debug_callback, client->debug_data,
-					"MTU exchange complete, with MTU: %u",
+					"att client MTU exchange complete, with MTU: %u",
 					bt_att_get_mtu(client->att));
 
 discover:
diff --git a/src/shared/gatt-server.c b/src/shared/gatt-server.c
index e9786455..53c60f3d 100644
--- a/src/shared/gatt-server.c
+++ b/src/shared/gatt-server.c
@@ -110,6 +110,12 @@ struct bt_gatt_server {
 	bt_gatt_server_debug_func_t debug_callback;
 	bt_gatt_server_destroy_func_t debug_destroy;
 	void *debug_data;
+
+#ifdef TIZEN_FEATURE_BLUEZ_MODIFY
+	bt_gatt_server_mtu_changed_callback_t mtu_chngd_callback;
+	bt_gatt_server_destroy_func_t mtu_chngd_destroy;
+	void *mtu_chngd_data;
+#endif
 };
 
 static void bt_gatt_server_free(struct bt_gatt_server *server)
@@ -1304,7 +1310,7 @@ static void exchange_mtu_cb(uint8_t opcode, const void *pdu,
 	}
 
 	client_rx_mtu = get_le16(pdu);
-#ifndef __TIZEN_PACTH__
+#ifndef TIZEN_FEATURE_BLUEZ_MODIFY
 	final_mtu = MAX(MIN(client_rx_mtu, server->mtu), BT_ATT_DEFAULT_LE_MTU);
 
 	/* Respond with the server MTU */
@@ -1326,10 +1332,13 @@ static void exchange_mtu_cb(uint8_t opcode, const void *pdu,
 	put_le16(server->mtu, rsp_pdu);
 	bt_att_send(server->att, BT_ATT_OP_MTU_RSP, rsp_pdu, 2, NULL, NULL,
 									NULL);
+
+	if (server->mtu_chngd_callback)
+		server->mtu_chngd_callback(final_mtu, server->mtu_chngd_data);
 #endif
 
 	util_debug(server->debug_callback, server->debug_data,
-			"MTU exchange complete, with MTU: %u", final_mtu);
+			"att server MTU exchange complete, with MTU: %u", final_mtu);
 }
 
 static bool gatt_server_register_att_handlers(struct bt_gatt_server *server)
@@ -1581,3 +1590,23 @@ bool bt_gatt_server_send_indication(struct bt_gatt_server *server,
 
 	return result;
 }
+
+#ifdef TIZEN_FEATURE_BLUEZ_MODIFY
+bool bt_gatt_server_set_mtu_changed(struct bt_gatt_server *server,
+			bt_gatt_server_mtu_changed_callback_t callback,
+			void *user_data,
+			bt_gatt_server_destroy_func_t destroy)
+{
+	if (!server)
+		return false;
+
+	if (server->mtu_chngd_destroy)
+		server->mtu_chngd_destroy(server->mtu_chngd_data);
+
+	server->mtu_chngd_callback = callback;
+	server->mtu_chngd_destroy = destroy;
+	server->mtu_chngd_data = user_data;
+
+	return true;
+}
+#endif
diff --git a/src/shared/gatt-server.h b/src/shared/gatt-server.h
index 0e480e1b..c61eabe8 100644
--- a/src/shared/gatt-server.h
+++ b/src/shared/gatt-server.h
@@ -50,3 +50,14 @@ bool bt_gatt_server_send_indication(struct bt_gatt_server *server,
 					bt_gatt_server_conf_func_t callback,
 					void *user_data,
 					bt_gatt_server_destroy_func_t destroy);
+
+#ifdef TIZEN_FEATURE_BLUEZ_MODIFY
+typedef void (*bt_gatt_server_mtu_changed_callback_t)(uint16_t mtu,
+							void *user_data);
+
+bool bt_gatt_server_set_mtu_changed(struct bt_gatt_server *server,
+			bt_gatt_server_mtu_changed_callback_t callback,
+			void *user_data,
+			bt_gatt_server_destroy_func_t destroy);
+
+#endif