:add congest direct callback and modify congest evt triger threshold

components/bt/bluedroid/bta/gatt/bta_gatts_act.c

@@ -1014,22 +1014,14 @@ static void bta_gatts_conn_cback (tGATT_IF gatt_if, BD_ADDR bda, UINT16 conn_id,
 ** Returns          none.
 **
 *******************************************************************************/
+extern void btc_congest_callback(tBTA_GATTS *param);
 static void bta_gatts_cong_cback (UINT16 conn_id, BOOLEAN congested)
 {
-    tBTA_GATTS_RCB *p_rcb;
-    tGATT_IF gatt_if;
-    tBTA_GATT_TRANSPORT transport;
     tBTA_GATTS cb_data;
 
-    if (GATT_GetConnectionInfor(conn_id, &gatt_if, cb_data.req_data.remote_bda, &transport)) {
-        p_rcb = bta_gatts_find_app_rcb_by_app_if(gatt_if);
+    cb_data.congest.conn_id = conn_id;
+    cb_data.congest.congested = congested;
 
-        if (p_rcb && p_rcb->p_cback) {
-            cb_data.congest.conn_id = conn_id;
-            cb_data.congest.congested = congested;
-
-            (*p_rcb->p_cback)(BTA_GATTS_CONGEST_EVT, &cb_data);
-        }
-    }
+    btc_congest_callback(&cb_data);
 }
 #endif /* GATTS_INCLUDED */

components/bt/bluedroid/btc/profile/std/gatt/btc_gatts.c

@@ -967,4 +967,13 @@ void btc_gatts_cb_handler(btc_msg_t *msg)
     btc_gatts_cb_param_copy_free(msg, p_data);
 }
 
+void btc_congest_callback(tBTA_GATTS *param)
+{
+    esp_ble_gatts_cb_param_t esp_param;
+    esp_gatt_if_t gatts_if = BTC_GATT_GET_GATT_IF(param->congest.conn_id);
+    esp_param.congest.conn_id = BTC_GATT_GET_CONN_ID(param->congest.conn_id);
+    esp_param.congest.congested = param->congest.congested;
+    btc_gatts_cb_to_app(ESP_GATTS_CONGEST_EVT, gatts_if, &esp_param);
+
+}
 #endif  ///GATTS_INCLUDED

components/bt/bluedroid/hci/packet_fragmenter.c

@@ -88,6 +88,13 @@ static void fragment_and_dispatch(BT_HDR *packet)
         controller->get_acl_data_size_ble();
 
     max_packet_size = max_data_size + HCI_ACL_PREAMBLE_SIZE;
+    if((packet->len > max_packet_size) && (packet->layer_specific == 0) && (event == MSG_STACK_TO_HC_HCI_ACL)) {
+        packet->event = MSG_HC_TO_STACK_L2C_SEG_XMIT;
+         current_fragment_packet = NULL;
+         callbacks->transmit_finished(packet, false);
+         return;
+
+    }
     remaining_length = packet->len;
     STREAM_TO_UINT16(continuation_handle, stream);
     continuation_handle = APPLY_CONTINUATION_FLAG(continuation_handle);

components/bt/bluedroid/stack/l2cap/include/l2c_int.h

@@ -264,7 +264,7 @@ typedef struct
 }tL2CAP_SEC_DATA;
 
 #ifndef L2CAP_CBB_DEFAULT_DATA_RATE_BUFF_QUOTA
-#define L2CAP_CBB_DEFAULT_DATA_RATE_BUFF_QUOTA 100
+#define L2CAP_CBB_DEFAULT_DATA_RATE_BUFF_QUOTA 10
 #endif
 /* Define a channel control block (CCB). There may be many channel control blocks
 ** between the same two Bluetooth devices (i.e. on the same link).

components/bt/bluedroid/stack/l2cap/l2c_api.c

@@ -1836,7 +1836,7 @@ UINT16 L2CA_SendFixedChnlData (UINT16 fixed_cid, BD_ADDR rem_bda, BT_HDR *p_buf)
 
     // If already congested, do not accept any more packets
     if (p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]->cong_sent) {
-        L2CAP_TRACE_DEBUG ("L2CAP - CID: 0x%04x cannot send, already congested\
+        L2CAP_TRACE_ERROR ("L2CAP - CID: 0x%04x cannot send, already congested\
             xmit_hold_q.count: %u buff_quota: %u", fixed_cid,
             fixed_queue_length(p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]->xmit_hold_q),
             p_lcb->p_fixed_ccbs[fixed_cid - L2CAP_FIRST_FIXED_CHNL]->buff_quota);

components/bt/bluedroid/stack/l2cap/l2c_utils.c

@@ -3655,8 +3655,9 @@ void l2cu_check_channel_congestion (tL2C_CCB *p_ccb)
 #endif
             }
         } else {
+            tL2C_LCB *p_lcb = p_ccb->p_lcb;
             /* If this channel was not congested but it is congested now, tell the app */
-            if (q_count > p_ccb->buff_quota) {
+            if ((q_count > p_ccb->buff_quota) || (p_lcb && (p_ccb->local_cid == L2CAP_ATT_CID) && (p_lcb->link_xmit_quota > 0) && (p_lcb->link_xmit_quota <= p_lcb->sent_not_acked))) {
                 p_ccb->cong_sent = TRUE;
                 if (p_ccb->p_rcb && p_ccb->p_rcb->api.pL2CA_CongestionStatus_Cb) {
                     L2CAP_TRACE_DEBUG ("L2CAP - Calling CongestionStatus_Cb (TRUE),CID:0x%04x,XmitQ:%u,Quota:%u",