This adds sending exchange MTU request on connection.
This is needed to pass TC_GAC_CL_BV_01_C.
---
android/gatt.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 71 insertions(+)
diff --git a/android/gatt.c b/android/gatt.c
index 89da60d..82e8dc1 100644
--- a/android/gatt.c
+++ b/android/gatt.c
@@ -979,6 +979,73 @@ static void send_app_connect_notifications(void *data, void *user_data)
static void att_handler(const uint8_t *ipdu, uint16_t len, gpointer user_data);
+static void exchange_mtu_cb(guint8 status, const guint8 *pdu, guint16 plen,
+ gpointer user_data)
+{
+ struct gatt_device *device = user_data;
+ GIOChannel *io;
+ GError *gerr = NULL;
+ uint16_t rmtu, mtu, imtu;
+
+ if (status) {
+ error("gatt: MTU exchange: %s", att_ecode2str(status));
+ goto failed;
+ }
+
+ if (!dec_mtu_resp(pdu, plen, &rmtu)) {
+ error("gatt: MTU exchange: protocol error");
+ goto failed;
+ }
+
+ if (rmtu < ATT_DEFAULT_LE_MTU) {
+ error("gatt: MTU exchange: mtu error");
+ goto failed;
+ }
+
+ io = g_attrib_get_channel(device->attrib);
+
+ bt_io_get(io, &gerr, BT_IO_OPT_IMTU, &imtu, BT_IO_OPT_INVALID);
+ if (gerr) {
+ error("gatt: Could not get imtu: %s", gerr->message);
+ g_error_free(gerr);
+
+ return;
+ }
+
+ mtu = MIN(rmtu, imtu);
+ if (mtu != imtu && !g_attrib_set_mtu(device->attrib, mtu)) {
+ error("gatt: MTU exchange failed");
+ goto failed;
+ }
+
+ DBG("MTU exchange succeeded: rmtu:%d, old mtu:%d, new mtu:%d", rmtu,
+ imtu, mtu);
+
+failed:
+ device_unref(device);
+}
+
+static void send_exchange_mtu_request(struct gatt_device *device)
+{
+ GIOChannel *io;
+ GError *gerr = NULL;
+ uint16_t imtu;
+
+ io = g_attrib_get_channel(device->attrib);
+
+ bt_io_get(io, &gerr, BT_IO_OPT_IMTU, &imtu, BT_IO_OPT_INVALID);
+ if (gerr) {
+ error("gatt: Could not get imtu: %s", gerr->message);
+ g_error_free(gerr);
+
+ return;
+ }
+
+ if (!gatt_exchange_mtu(device->attrib, imtu, exchange_mtu_cb,
+ device_ref(device)))
+ device_unref(device);
+}
+
static void connect_cb(GIOChannel *io, GError *gerr, gpointer user_data)
{
struct gatt_device *dev = user_data;
@@ -1024,6 +1091,10 @@ static void connect_cb(GIOChannel *io, GError *gerr, gpointer user_data)
device_set_state(dev, DEVICE_CONNECTED);
+ /* Send exchange mtu request as we assume being client and server */
+ /* TODO: Dont exchange mtu if no client apps */
+ send_exchange_mtu_request(dev);
+
status = GATT_SUCCESS;
reply:
--
1.9.3
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