From: DoHyun Pyun <dh79.pyun@samsung.com>
Date: Mon, 31 May 2021 01:11:21 +0000 (+0900)
Subject: Allow zero length for GATT server write request
X-Git-Tag: submit/tizen_6.0/20220926.043134~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cebef50cf630acd2194235d2827d546bb53c31db;p=platform%2Fcore%2Fapi%2Fbluetooth.git

Allow zero length for GATT server write request

Google's Chromecast app needs to response for zero
length write request in GATT server.

Change-Id: I5142ecd4dc7964caa2421aa0ecb39f0d0055c305
Signed-off-by: DoHyun Pyun <dh79.pyun@samsung.com>
---

diff --git a/src/bluetooth-common.c b/src/bluetooth-common.c
index c6514ef..c3bda91 100644
--- a/src/bluetooth-common.c
+++ b/src/bluetooth-common.c
@@ -2733,17 +2733,20 @@ static void __bt_event_proxy(int event, bluetooth_event_param_t *param, void *us
 		void *user_data_write = NULL;
 		bt_gatt_h gatt_handle = NULL;
 		bt_gatt_h server = NULL;
+		char *val = NULL;
 		bool is_own_handle = false;
 		bluetooth_gatt_server_write_requested_info_t *write_req =
 					(bluetooth_gatt_server_write_requested_info_t *)(param->param_data);
 
-		char *val = g_malloc0(write_req->length);
-		if (val == NULL) {
-			BT_ERR("failed to allocate val");
-			return;
-		}
+		if (write_req->length > 0) {
+			val = g_malloc0(write_req->length);
+			if (val == NULL) {
+				BT_ERR("failed to allocate val");
+				return;
+			}
 
-		memcpy(val, write_req->data.data, write_req->length);
+			memcpy(val, write_req->data.data, write_req->length);
+		}
 		cb_wr = __bt_gatt_attribute_get_value_change_cb(write_req->attribute_handle,
 								&server, &gatt_handle, &is_own_handle, &user_data_write);