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 "gd/common/init_flags.h"
22 #include "hci/include/btsnoop_mem.h"
23
24 static btsnoop_data_cb data_callback = NULL;
25 static activity_attribution_cb attribution_callback = NULL;
26
btsnoop_mem_set_callback(btsnoop_data_cb cb)27 void btsnoop_mem_set_callback(btsnoop_data_cb cb) { data_callback = cb; }
28
activity_attribution_set_callback(activity_attribution_cb cb)29 void activity_attribution_set_callback(activity_attribution_cb cb) {
30 attribution_callback = cb;
31 }
32
btsnoop_mem_capture(const BT_HDR * packet,uint64_t timestamp_us)33 void btsnoop_mem_capture(const BT_HDR* packet, uint64_t timestamp_us) {
34 if (!data_callback && !attribution_callback) return;
35
36 CHECK(packet);
37
38 const uint8_t* data = &packet->data[packet->offset];
39 const uint16_t type = packet->event & BT_EVT_MASK;
40 size_t length = 0;
41
42 switch (type) {
43 case BT_EVT_TO_LM_HCI_CMD:
44 if (packet->len > 2) length = data[2] + 3;
45 break;
46
47 case BT_EVT_TO_BTU_HCI_EVT:
48 if (packet->len > 1) length = data[1] + 2;
49 break;
50
51 case BT_EVT_TO_LM_HCI_ACL:
52 case BT_EVT_TO_BTU_HCI_ACL:
53 if (packet->len > 3) length = (data[2] | (data[3] << 8)) + 4;
54 break;
55
56 case BT_EVT_TO_LM_HCI_SCO:
57 case BT_EVT_TO_BTU_HCI_SCO:
58 if (packet->len > 2) length = data[2] + 3;
59 break;
60
61 case BT_EVT_TO_LM_HCI_ISO:
62 case BT_EVT_TO_BTU_HCI_ISO:
63 if (packet->len > 3) length = (data[2] | ((data[3] & 0x3f) << 8)) + 4;
64 break;
65 }
66
67 if (length && data_callback)
68 (*data_callback)(type, data, length, timestamp_us);
69 if (length && attribution_callback &&
70 bluetooth::common::init_flags::btaa_hci_is_enabled()) {
71 (*attribution_callback)(type, data, length, timestamp_us);
72 }
73 }
74