1 /****************************************************************************** 2 * 3 * Copyright 2015 Google Inc. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 #include <base/logging.h> 20 21 #include "hci/include/btsnoop_mem.h" 22 23 static btsnoop_data_cb data_callback = NULL; 24 25 void btsnoop_mem_set_callback(btsnoop_data_cb cb) { data_callback = cb; } 26 27 void btsnoop_mem_capture(const BT_HDR* packet, uint64_t timestamp_us) { 28 if (!data_callback) return; 29 30 CHECK(packet); 31 32 const uint8_t* data = &packet->data[packet->offset]; 33 const uint16_t type = packet->event & BT_EVT_MASK; 34 size_t length = 0; 35 36 switch (type) { 37 case BT_EVT_TO_LM_HCI_CMD: 38 if (packet->len > 2) length = data[2] + 3; 39 break; 40 41 case BT_EVT_TO_BTU_HCI_EVT: 42 if (packet->len > 1) length = data[1] + 2; 43 break; 44 45 case BT_EVT_TO_LM_HCI_ACL: 46 case BT_EVT_TO_BTU_HCI_ACL: 47 if (packet->len > 3) length = (data[2] | (data[3] << 8)) + 4; 48 break; 49 50 case BT_EVT_TO_LM_HCI_SCO: 51 case BT_EVT_TO_BTU_HCI_SCO: 52 if (packet->len > 2) length = data[2] + 3; 53 break; 54 } 55 56 if (length) (*data_callback)(type, data, length, timestamp_us); 57 } 58
