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1 /******************************************************************************
2  *
3  *  Copyright 2014 The Android Open Source Project
4  *  Copyright 2003-2012 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  *  This file contains action functions for MCE.
23  *
24  ******************************************************************************/
25 
26 #include <arpa/inet.h>
27 #include <hardware/bluetooth.h>
28 
29 #include <string.h>
30 #include "bt_common.h"
31 #include "bt_types.h"
32 #include "bta_api.h"
33 #include "bta_mce_api.h"
34 #include "bta_mce_int.h"
35 #include "bta_sys.h"
36 #include "btm_api.h"
37 #include "btm_int.h"
38 #include "sdp_api.h"
39 #include "utl.h"
40 
41 using bluetooth::Uuid;
42 
43 /*****************************************************************************
44  *  Constants
45  ****************************************************************************/
46 
47 static const Uuid bta_mce_mas_uuid =
48     Uuid::From16Bit(UUID_SERVCLASS_MESSAGE_ACCESS);
49 
50 /*******************************************************************************
51  *
52  * Function     bta_mce_search_cback
53  *
54  * Description  Callback from btm after search is completed
55  *
56  * Returns      void
57  *
58  ******************************************************************************/
59 
bta_mce_search_cback(uint16_t result,void * user_data)60 static void bta_mce_search_cback(uint16_t result, void* user_data) {
61   tSDP_DISC_REC* p_rec = NULL;
62   tBTA_MCE_MAS_DISCOVERY_COMP evt_data;
63   int found = 0;
64 
65   APPL_TRACE_DEBUG("bta_mce_start_discovery_cback res: 0x%x", result);
66 
67   bta_mce_cb.sdp_active = BTA_MCE_SDP_ACT_NONE;
68 
69   if (bta_mce_cb.p_dm_cback == NULL) return;
70 
71   evt_data.status = BTA_MCE_FAILURE;
72   evt_data.remote_addr = bta_mce_cb.remote_addr;
73   evt_data.num_mas = 0;
74 
75   if (result == SDP_SUCCESS || result == SDP_DB_FULL) {
76     do {
77       tSDP_DISC_ATTR* p_attr;
78       tSDP_PROTOCOL_ELEM pe;
79 
80       p_rec = SDP_FindServiceUUIDInDb(p_bta_mce_cfg->p_sdp_db, bta_mce_mas_uuid,
81                                       p_rec);
82 
83       APPL_TRACE_DEBUG("p_rec:%p", p_rec);
84 
85       if (p_rec == NULL) break;
86 
87       if (!SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_RFCOMM, &pe))
88         continue;
89 
90       evt_data.mas[found].scn = pe.params[0];
91 
92       p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SERVICE_NAME);
93       if (p_attr == NULL) continue;
94 
95       evt_data.mas[found].p_srv_name = (char*)p_attr->attr_value.v.array;
96       evt_data.mas[found].srv_name_len =
97           SDP_DISC_ATTR_LEN(p_attr->attr_len_type);
98 
99       p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_MAS_INSTANCE_ID);
100       if (p_attr == NULL) break;
101 
102       evt_data.mas[found].instance_id = p_attr->attr_value.v.u8;
103 
104       p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_MSG_TYPE);
105       if (p_attr == NULL) break;
106 
107       evt_data.mas[found].msg_type = p_attr->attr_value.v.u8;
108 
109       found++;
110     } while (p_rec != NULL && found < BTA_MCE_MAX_MAS_INSTANCES);
111 
112     evt_data.num_mas = found;
113     evt_data.status = BTA_MCE_SUCCESS;
114   }
115 
116   tBTA_MCE bta_mce;
117   bta_mce.mas_disc_comp = evt_data;
118   bta_mce_cb.p_dm_cback(BTA_MCE_MAS_DISCOVERY_COMP_EVT, &bta_mce, user_data);
119 }
120 
121 /*******************************************************************************
122  *
123  * Function     bta_mce_enable
124  *
125  * Description  Initializes the MCE I/F
126  *
127  * Returns      void
128  *
129  ******************************************************************************/
bta_mce_enable(tBTA_MCE_MSG * p_data)130 void bta_mce_enable(tBTA_MCE_MSG* p_data) {
131   tBTA_MCE_STATUS status = BTA_MCE_SUCCESS;
132   bta_mce_cb.p_dm_cback = p_data->enable.p_cback;
133   tBTA_MCE bta_mce;
134   bta_mce.status = status;
135   bta_mce_cb.p_dm_cback(BTA_MCE_ENABLE_EVT, &bta_mce, NULL);
136 }
137 
138 /*******************************************************************************
139  *
140  * Function     bta_mce_get_remote_mas_instances
141  *
142  * Description  Discovers MAS instances on remote device
143  *
144  * Returns      void
145  *
146  ******************************************************************************/
bta_mce_get_remote_mas_instances(tBTA_MCE_MSG * p_data)147 void bta_mce_get_remote_mas_instances(tBTA_MCE_MSG* p_data) {
148   if (p_data == NULL) {
149     APPL_TRACE_DEBUG("MCE control block handle is null");
150     return;
151   }
152   tBTA_MCE_STATUS status = BTA_MCE_FAILURE;
153 
154   APPL_TRACE_DEBUG("%s in, sdp_active:%d", __func__, bta_mce_cb.sdp_active);
155 
156   if (bta_mce_cb.sdp_active != BTA_MCE_SDP_ACT_NONE) {
157     /* SDP is still in progress */
158     status = BTA_MCE_BUSY;
159     if (bta_mce_cb.p_dm_cback) {
160       tBTA_MCE bta_mce;
161       bta_mce.status = status;
162       bta_mce_cb.p_dm_cback(BTA_MCE_MAS_DISCOVERY_COMP_EVT, &bta_mce, NULL);
163     }
164 
165     return;
166   }
167 
168   bta_mce_cb.sdp_active = BTA_MCE_SDP_ACT_YES;
169   bta_mce_cb.remote_addr = p_data->get_rmt_mas.bd_addr;
170 
171   SDP_InitDiscoveryDb(p_bta_mce_cfg->p_sdp_db, p_bta_mce_cfg->sdp_db_size, 1,
172                       &bta_mce_mas_uuid, 0, NULL);
173 
174   if (!SDP_ServiceSearchAttributeRequest2(p_data->get_rmt_mas.bd_addr,
175                                           p_bta_mce_cfg->p_sdp_db,
176                                           bta_mce_search_cback, NULL)) {
177     bta_mce_cb.sdp_active = BTA_MCE_SDP_ACT_NONE;
178 
179     /* failed to start SDP. report the failure right away */
180     if (bta_mce_cb.p_dm_cback) {
181       tBTA_MCE bta_mce;
182       bta_mce.status = status;
183       bta_mce_cb.p_dm_cback(BTA_MCE_MAS_DISCOVERY_COMP_EVT, &bta_mce, NULL);
184     }
185   }
186   /*
187   else report the result when the cback is called
188   */
189 }
190