1/******************************************************************************
2 *
3 *  Copyright 2014 The Android Open Source Project
4 *  Copyright 2009-2012 Broadcom Corporation
5 *
6 *  Licensed under the Apache License, Version 2.0 (the "License");
7 *  you may not use this file except in compliance with the License.
8 *  You may obtain a copy of the License at:
9 *
10 *  http://www.apache.org/licenses/LICENSE-2.0
11 *
12 *  Unless required by applicable law or agreed to in writing, software
13 *  distributed under the License is distributed on an "AS IS" BASIS,
14 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 *  See the License for the specific language governing permissions and
16 *  limitations under the License.
17 *
18 ******************************************************************************/
19
20/*******************************************************************************
21 *
22 *  Filename:      btif_mce.c
23 *
24 *  Description:   Message Access Profile (MCE role) Bluetooth Interface
25 *
26 *
27 ******************************************************************************/
28
29#define LOG_TAG "bt_btif_mce"
30
31#include <stdlib.h>
32#include <string.h>
33
34#include <hardware/bluetooth.h>
35#include <hardware/bt_mce.h>
36
37#include "bt_types.h"
38#include "bta_api.h"
39#include "bta_mce_api.h"
40#include "btif_common.h"
41#include "btif_util.h"
42
43/*****************************************************************************
44 *  Static variables
45 *****************************************************************************/
46
47static btmce_callbacks_t* bt_mce_callbacks = NULL;
48
49static void btif_mce_mas_discovery_comp_evt(uint16_t event, char* p_param) {
50  tBTA_MCE_MAS_DISCOVERY_COMP* evt_data = (tBTA_MCE_MAS_DISCOVERY_COMP*)p_param;
51  btmce_mas_instance_t insts[BTA_MCE_MAX_MAS_INSTANCES];
52  int i;
53
54  BTIF_TRACE_EVENT("%s:  event = %d", __func__, event);
55
56  if (event != BTA_MCE_MAS_DISCOVERY_COMP_EVT) return;
57
58  for (i = 0; i < evt_data->num_mas; i++) {
59    insts[i].id = evt_data->mas[i].instance_id;
60    insts[i].scn = evt_data->mas[i].scn;
61    insts[i].msg_types = evt_data->mas[i].msg_type;
62    insts[i].p_name = evt_data->mas[i].p_srv_name;
63  }
64
65  RawAddress addr = evt_data->remote_addr;
66  HAL_CBACK(bt_mce_callbacks, remote_mas_instances_cb,
67            (bt_status_t)evt_data->status, &addr, evt_data->num_mas, insts);
68}
69
70static void mas_discovery_comp_copy_cb(uint16_t event, char* p_dest,
71                                       char* p_src) {
72  tBTA_MCE_MAS_DISCOVERY_COMP* p_dest_data =
73      (tBTA_MCE_MAS_DISCOVERY_COMP*)p_dest;
74  tBTA_MCE_MAS_DISCOVERY_COMP* p_src_data = (tBTA_MCE_MAS_DISCOVERY_COMP*)p_src;
75  char* p_dest_str;
76  int i;
77
78  if (!p_src) return;
79
80  if (event != BTA_MCE_MAS_DISCOVERY_COMP_EVT) return;
81
82  maybe_non_aligned_memcpy(p_dest_data, p_src_data, sizeof(*p_src_data));
83
84  p_dest_str = p_dest + sizeof(tBTA_MCE_MAS_DISCOVERY_COMP);
85
86  for (i = 0; i < p_src_data->num_mas; i++) {
87    p_dest_data->mas[i].p_srv_name = p_dest_str;
88    memcpy(p_dest_str, p_src_data->mas[i].p_srv_name,
89           p_src_data->mas[i].srv_name_len);
90    p_dest_str += p_src_data->mas[i].srv_name_len;
91    *(p_dest_str++) = '\0';
92  }
93}
94
95static void mce_dm_cback(tBTA_MCE_EVT event, tBTA_MCE* p_data,
96                         void* user_data) {
97  switch (event) {
98    case BTA_MCE_MAS_DISCOVERY_COMP_EVT: {
99      int i;
100      uint16_t param_len = sizeof(tBTA_MCE);
101
102      /* include space for all p_srv_name copies including null-termination */
103      for (i = 0; i < p_data->mas_disc_comp.num_mas; i++)
104        param_len += (p_data->mas_disc_comp.mas[i].srv_name_len + 1);
105
106      /* need to deepy copy p_srv_name and null-terminate */
107      btif_transfer_context(btif_mce_mas_discovery_comp_evt, event,
108                            (char*)p_data, param_len,
109                            mas_discovery_comp_copy_cb);
110
111      break;
112    }
113  }
114}
115
116static bt_status_t init(btmce_callbacks_t* callbacks) {
117  BTIF_TRACE_EVENT("%s", __func__);
118
119  bt_mce_callbacks = callbacks;
120
121  btif_enable_service(BTA_MAP_SERVICE_ID);
122
123  return BT_STATUS_SUCCESS;
124}
125
126static bt_status_t get_remote_mas_instances(RawAddress* bd_addr) {
127  VLOG(2) << __func__ << ": remote_addr=" << bd_addr;
128
129  BTA_MceGetRemoteMasInstances(*bd_addr);
130
131  return BT_STATUS_SUCCESS;
132}
133
134static const btmce_interface_t mce_if = {
135    sizeof(btmce_interface_t), init, get_remote_mas_instances,
136};
137
138const btmce_interface_t* btif_mce_get_interface(void) {
139  BTIF_TRACE_EVENT("%s", __func__);
140  return &mce_if;
141}
142
143/*******************************************************************************
144 *
145 * Function         btif_mce_execute_service
146 *
147 * Description      Initializes/Shuts down the service
148 *
149 * Returns          BT_STATUS_SUCCESS on success, BT_STATUS_FAIL otherwise
150 *
151 ******************************************************************************/
152bt_status_t btif_mce_execute_service(bool b_enable) {
153  BTIF_TRACE_EVENT("%s enable:%d", __func__, b_enable);
154
155  if (b_enable) {
156    BTA_MceEnable(mce_dm_cback);
157  } else {
158    /* This is called on BT disable so no need to extra cleanup */
159  }
160  return BT_STATUS_SUCCESS;
161}
162