1 /******************************************************************************
2  *
3  *  Copyright (c) 2014 The Android Open Source Project
4  *  Copyright (C) 2004-2012 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 the audio gateway functions controlling the RFCOMM
23  *  connections.
24  *
25  ******************************************************************************/
26 
27 #include <string.h>
28 #include "bta_api.h"
29 #include "bta_hf_client_int.h"
30 #include "port_api.h"
31 #include "bt_utils.h"
32 
33 /*******************************************************************************
34 **
35 ** Function         bta_hf_client_port_cback
36 **
37 ** Description      RFCOMM Port callback
38 **
39 **
40 ** Returns          void
41 **
42 *******************************************************************************/
bta_hf_client_port_cback(UINT32 code,UINT16 port_handle)43 static void bta_hf_client_port_cback(UINT32 code, UINT16 port_handle)
44 {
45     BT_HDR      *p_buf;
46     UNUSED(code);
47 
48     /* ignore port events for port handles other than connected handle */
49     if (port_handle != bta_hf_client_cb.scb.conn_handle)
50     {
51         APPL_TRACE_DEBUG("bta_hf_client_port_cback ignoring handle:%d conn_handle = %d",
52                           port_handle, bta_hf_client_cb.scb.conn_handle);
53         return;
54     }
55 
56     if ((p_buf = (BT_HDR *) GKI_getbuf(sizeof(BT_HDR))) != NULL)
57     {
58         p_buf->event = BTA_HF_CLIENT_RFC_DATA_EVT;
59         bta_sys_sendmsg(p_buf);
60     }
61 }
62 
63 /*******************************************************************************
64 **
65 ** Function         bta_hf_client_mgmt_cback
66 **
67 ** Description      RFCOMM management callback
68 **
69 **
70 ** Returns          void
71 **
72 *******************************************************************************/
bta_hf_client_mgmt_cback(UINT32 code,UINT16 port_handle)73 static void bta_hf_client_mgmt_cback(UINT32 code, UINT16 port_handle)
74 {
75     tBTA_HF_CLIENT_RFC     *p_buf;
76     UINT16                  event;
77 
78     APPL_TRACE_DEBUG("bta_hf_client_mgmt_cback : code = %d, port_handle = %d, conn_handle = %d, serv_handle = %d",
79                         code, port_handle, bta_hf_client_cb.scb.conn_handle, bta_hf_client_cb.scb.serv_handle);
80 
81     /* ignore close event for port handles other than connected handle */
82     if ((code != PORT_SUCCESS) && (port_handle != bta_hf_client_cb.scb.conn_handle))
83     {
84         APPL_TRACE_DEBUG("bta_hf_client_mgmt_cback ignoring handle:%d", port_handle);
85         return;
86     }
87 
88     if (code == PORT_SUCCESS)
89     {
90         if ((bta_hf_client_cb.scb.conn_handle && (port_handle == bta_hf_client_cb.scb.conn_handle)) || /* outgoing connection */
91                 (port_handle == bta_hf_client_cb.scb.serv_handle))                       /* incoming connection */
92         {
93             event = BTA_HF_CLIENT_RFC_OPEN_EVT;
94         }
95         else
96         {
97             APPL_TRACE_ERROR ("bta_hf_client_mgmt_cback: PORT_SUCCESS, ignoring handle = %d", port_handle);
98             return;
99         }
100     }
101     /* distinguish server close events */
102     else if (port_handle == bta_hf_client_cb.scb.conn_handle)
103     {
104         event = BTA_HF_CLIENT_RFC_CLOSE_EVT;
105     }
106     else
107     {
108         event = BTA_HF_CLIENT_RFC_SRV_CLOSE_EVT;
109     }
110 
111     if ((p_buf = (tBTA_HF_CLIENT_RFC *) GKI_getbuf(sizeof(tBTA_HF_CLIENT_RFC))) != NULL)
112     {
113         p_buf->hdr.event = event;
114         p_buf->port_handle = port_handle;
115         bta_sys_sendmsg(p_buf);
116     }
117 }
118 
119 /*******************************************************************************
120 **
121 ** Function         bta_hf_client_setup_port
122 **
123 ** Description      Setup RFCOMM port for use by HF Client.
124 **
125 **
126 ** Returns          void
127 **
128 *******************************************************************************/
bta_hf_client_setup_port(UINT16 handle)129 void bta_hf_client_setup_port(UINT16 handle)
130 {
131     PORT_SetEventMask(handle, PORT_EV_RXCHAR);
132     PORT_SetEventCallback(handle, bta_hf_client_port_cback);
133 }
134 
135 /*******************************************************************************
136 **
137 ** Function         bta_hf_client_start_server
138 **
139 ** Description      Setup RFCOMM server for use by HF Client.
140 **
141 **
142 ** Returns          void
143 **
144 *******************************************************************************/
bta_hf_client_start_server(void)145 void bta_hf_client_start_server(void)
146 {
147     int port_status;
148 
149     if (bta_hf_client_cb.scb.serv_handle > 0)
150     {
151         APPL_TRACE_DEBUG("%s already started, handle: %d", __FUNCTION__, bta_hf_client_cb.scb.serv_handle);
152         return;
153     }
154 
155     BTM_SetSecurityLevel(FALSE, "", BTM_SEC_SERVICE_HF_HANDSFREE, bta_hf_client_cb.scb.serv_sec_mask,
156         BT_PSM_RFCOMM, BTM_SEC_PROTO_RFCOMM, bta_hf_client_cb.scn);
157 
158     port_status =  RFCOMM_CreateConnection(UUID_SERVCLASS_HF_HANDSFREE, bta_hf_client_cb.scn,
159         TRUE, BTA_HF_CLIENT_MTU, (UINT8 *) bd_addr_any, &(bta_hf_client_cb.scb.serv_handle),
160         bta_hf_client_mgmt_cback);
161 
162     if (port_status  == PORT_SUCCESS)
163     {
164         bta_hf_client_setup_port(bta_hf_client_cb.scb.serv_handle);
165     }
166     else
167     {
168         /* TODO: can we handle this better? */
169         APPL_TRACE_DEBUG("bta_hf_client_start_server: RFCOMM_CreateConnection returned error:%d", port_status);
170     }
171 
172     APPL_TRACE_DEBUG("bta_hf_client_start_server handle: %d", bta_hf_client_cb.scb.serv_handle);
173 }
174 
175 /*******************************************************************************
176 **
177 ** Function         bta_hf_client_close_server
178 **
179 ** Description      Close RFCOMM server port for use by HF Client.
180 **
181 **
182 ** Returns          void
183 **
184 *******************************************************************************/
bta_hf_client_close_server(void)185 void bta_hf_client_close_server(void)
186 {
187     APPL_TRACE_DEBUG("%s %d", __FUNCTION__, bta_hf_client_cb.scb.serv_handle);
188 
189     if (bta_hf_client_cb.scb.serv_handle == 0)
190     {
191         APPL_TRACE_DEBUG("%s already stopped", __FUNCTION__);
192         return;
193     }
194 
195     RFCOMM_RemoveServer(bta_hf_client_cb.scb.serv_handle);
196     bta_hf_client_cb.scb.serv_handle = 0;
197 }
198 
199 /*******************************************************************************
200 **
201 ** Function         bta_hf_client_rfc_do_open
202 **
203 ** Description      Open an RFCOMM connection to the peer device.
204 **
205 **
206 ** Returns          void
207 **
208 *******************************************************************************/
bta_hf_client_rfc_do_open(tBTA_HF_CLIENT_DATA * p_data)209 void bta_hf_client_rfc_do_open(tBTA_HF_CLIENT_DATA *p_data)
210 {
211     BTM_SetSecurityLevel(TRUE, "", BTM_SEC_SERVICE_HF_HANDSFREE,
212                             bta_hf_client_cb.scb.cli_sec_mask, BT_PSM_RFCOMM,
213                             BTM_SEC_PROTO_RFCOMM, bta_hf_client_cb.scb.peer_scn);
214 
215     if (RFCOMM_CreateConnection(UUID_SERVCLASS_HF_HANDSFREE, bta_hf_client_cb.scb.peer_scn,
216             FALSE, BTA_HF_CLIENT_MTU, bta_hf_client_cb.scb.peer_addr, &(bta_hf_client_cb.scb.conn_handle),
217             bta_hf_client_mgmt_cback) == PORT_SUCCESS)
218     {
219         bta_hf_client_setup_port(bta_hf_client_cb.scb.conn_handle);
220         APPL_TRACE_DEBUG("bta_hf_client_rfc_do_open : conn_handle = %d", bta_hf_client_cb.scb.conn_handle);
221     }
222     /* RFCOMM create connection failed; send ourselves RFCOMM close event */
223     else
224     {
225         bta_hf_client_sm_execute(BTA_HF_CLIENT_RFC_CLOSE_EVT, p_data);
226     }
227 }
228 
229 /*******************************************************************************
230 **
231 ** Function         bta_hf_client_rfc_do_close
232 **
233 ** Description      Close RFCOMM connection.
234 **
235 **
236 ** Returns          void
237 **
238 *******************************************************************************/
bta_hf_client_rfc_do_close(tBTA_HF_CLIENT_DATA * p_data)239 void bta_hf_client_rfc_do_close(tBTA_HF_CLIENT_DATA *p_data)
240 {
241     tBTA_HF_CLIENT_RFC     *p_buf;
242     UNUSED(p_data);
243 
244     if (bta_hf_client_cb.scb.conn_handle)
245     {
246         RFCOMM_RemoveConnection(bta_hf_client_cb.scb.conn_handle);
247     }
248     else
249     {
250         /* Close API was called while HF Client is in Opening state.        */
251         /* Need to trigger the state machine to send callback to the app    */
252         /* and move back to INIT state.                                     */
253         if ((p_buf = (tBTA_HF_CLIENT_RFC *) GKI_getbuf(sizeof(tBTA_HF_CLIENT_RFC))) != NULL)
254         {
255             p_buf->hdr.event = BTA_HF_CLIENT_RFC_CLOSE_EVT;
256             bta_sys_sendmsg(p_buf);
257         }
258 
259         /* Cancel SDP if it had been started. */
260         if(bta_hf_client_cb.scb.p_disc_db)
261         {
262             (void)SDP_CancelServiceSearch (bta_hf_client_cb.scb.p_disc_db);
263             bta_hf_client_free_db(NULL);
264         }
265     }
266 }
267