1 /******************************************************************************
2 *
3 * Copyright (C) 2008-2012 Broadcom Corporation
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 /******************************************************************************
20 *
21 * this file contains the main GATT server attributes access request
22 * handling functions.
23 *
24 ******************************************************************************/
25
26 #include "bt_target.h"
27 #include "bt_utils.h"
28
29 #include "gatt_api.h"
30 #include "gatt_int.h"
31
32 #if BLE_INCLUDED == TRUE
33
34 #define GATTP_MAX_NUM_INC_SVR 0
35 #define GATTP_MAX_CHAR_NUM 2
36 #define GATTP_MAX_ATTR_NUM (GATTP_MAX_CHAR_NUM * 2 + GATTP_MAX_NUM_INC_SVR + 1)
37 #define GATTP_MAX_CHAR_VALUE_SIZE 50
38
39 #ifndef GATTP_ATTR_DB_SIZE
40 #define GATTP_ATTR_DB_SIZE GATT_DB_MEM_SIZE(GATTP_MAX_NUM_INC_SVR, GATTP_MAX_CHAR_NUM, GATTP_MAX_CHAR_VALUE_SIZE)
41 #endif
42
43 static void gatt_request_cback(UINT16 conn_id, UINT32 trans_id, UINT8 op_code, tGATTS_DATA *p_data);
44 static void gatt_connect_cback(tGATT_IF gatt_if, BD_ADDR bda, UINT16 conn_id, BOOLEAN connected,
45 tGATT_DISCONN_REASON reason, tBT_TRANSPORT transport);
46 static void gatt_disc_res_cback(UINT16 conn_id, tGATT_DISC_TYPE disc_type, tGATT_DISC_RES *p_data);
47 static void gatt_disc_cmpl_cback(UINT16 conn_id, tGATT_DISC_TYPE disc_type, tGATT_STATUS status);
48 static void gatt_cl_op_cmpl_cback(UINT16 conn_id, tGATTC_OPTYPE op, tGATT_STATUS status,
49 tGATT_CL_COMPLETE *p_data);
50
51 static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB *p_clcb);
52
53
54 static tGATT_CBACK gatt_profile_cback =
55 {
56 gatt_connect_cback,
57 gatt_cl_op_cmpl_cback,
58 gatt_disc_res_cback,
59 gatt_disc_cmpl_cback,
60 gatt_request_cback,
61 NULL,
62 NULL
63 } ;
64
65 /*******************************************************************************
66 **
67 ** Function gatt_profile_find_conn_id_by_bd_addr
68 **
69 ** Description Find the connection ID by remote address
70 **
71 ** Returns Connection ID
72 **
73 *******************************************************************************/
gatt_profile_find_conn_id_by_bd_addr(BD_ADDR remote_bda)74 UINT16 gatt_profile_find_conn_id_by_bd_addr(BD_ADDR remote_bda)
75 {
76 UINT16 conn_id = GATT_INVALID_CONN_ID;
77 GATT_GetConnIdIfConnected (gatt_cb.gatt_if, remote_bda, &conn_id, BT_TRANSPORT_LE);
78 return conn_id;
79 }
80
81 /*******************************************************************************
82 **
83 ** Function gatt_profile_find_clcb_by_conn_id
84 **
85 ** Description find clcb by Connection ID
86 **
87 ** Returns Pointer to the found link conenction control block.
88 **
89 *******************************************************************************/
gatt_profile_find_clcb_by_conn_id(UINT16 conn_id)90 static tGATT_PROFILE_CLCB *gatt_profile_find_clcb_by_conn_id(UINT16 conn_id)
91 {
92 UINT8 i_clcb;
93 tGATT_PROFILE_CLCB *p_clcb = NULL;
94
95 for (i_clcb = 0, p_clcb= gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; i_clcb++, p_clcb++)
96 {
97 if (p_clcb->in_use && p_clcb->conn_id == conn_id)
98 return p_clcb;
99 }
100
101 return p_clcb;
102 }
103
104 /*******************************************************************************
105 **
106 ** Function gatt_profile_find_clcb_by_bd_addr
107 **
108 ** Description The function searches all LCBs with macthing bd address.
109 **
110 ** Returns Pointer to the found link conenction control block.
111 **
112 *******************************************************************************/
gatt_profile_find_clcb_by_bd_addr(BD_ADDR bda,tBT_TRANSPORT transport)113 static tGATT_PROFILE_CLCB *gatt_profile_find_clcb_by_bd_addr(BD_ADDR bda, tBT_TRANSPORT transport)
114 {
115 UINT8 i_clcb;
116 tGATT_PROFILE_CLCB *p_clcb = NULL;
117
118 for (i_clcb = 0, p_clcb= gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; i_clcb++, p_clcb++)
119 {
120 if (p_clcb->in_use && p_clcb->transport == transport &&
121 p_clcb->connected && !memcmp(p_clcb->bda, bda, BD_ADDR_LEN))
122 return p_clcb;
123 }
124
125 return p_clcb;
126 }
127
128 /*******************************************************************************
129 **
130 ** Function gatt_profile_clcb_alloc
131 **
132 ** Description The function allocates a GATT profile connection link control block
133 **
134 ** Returns NULL if not found. Otherwise pointer to the connection link block.
135 **
136 *******************************************************************************/
gatt_profile_clcb_alloc(UINT16 conn_id,BD_ADDR bda,tBT_TRANSPORT tranport)137 tGATT_PROFILE_CLCB *gatt_profile_clcb_alloc (UINT16 conn_id, BD_ADDR bda, tBT_TRANSPORT tranport)
138 {
139 UINT8 i_clcb = 0;
140 tGATT_PROFILE_CLCB *p_clcb = NULL;
141
142 for (i_clcb = 0, p_clcb= gatt_cb.profile_clcb; i_clcb < GATT_MAX_APPS; i_clcb++, p_clcb++)
143 {
144 if (!p_clcb->in_use)
145 {
146 p_clcb->in_use = TRUE;
147 p_clcb->conn_id = conn_id;
148 p_clcb->connected = TRUE;
149 p_clcb->transport = tranport;
150 memcpy (p_clcb->bda, bda, BD_ADDR_LEN);
151 break;
152 }
153 }
154 return p_clcb;
155 }
156
157 /*******************************************************************************
158 **
159 ** Function gatt_profile_clcb_dealloc
160 **
161 ** Description The function deallocates a GATT profile connection link control block
162 **
163 ** Returns void
164 **
165 *******************************************************************************/
gatt_profile_clcb_dealloc(tGATT_PROFILE_CLCB * p_clcb)166 void gatt_profile_clcb_dealloc (tGATT_PROFILE_CLCB *p_clcb)
167 {
168 memset(p_clcb, 0, sizeof(tGATT_PROFILE_CLCB));
169 }
170
171 /*******************************************************************************
172 **
173 ** Function gatt_request_cback
174 **
175 ** Description GATT profile attribute access request callback.
176 **
177 ** Returns void.
178 **
179 *******************************************************************************/
gatt_request_cback(UINT16 conn_id,UINT32 trans_id,tGATTS_REQ_TYPE type,tGATTS_DATA * p_data)180 static void gatt_request_cback (UINT16 conn_id, UINT32 trans_id, tGATTS_REQ_TYPE type,
181 tGATTS_DATA *p_data)
182 {
183 UINT8 status = GATT_INVALID_PDU;
184 tGATTS_RSP rsp_msg ;
185 BOOLEAN ignore = FALSE;
186
187 memset(&rsp_msg, 0, sizeof(tGATTS_RSP));
188
189 switch (type)
190 {
191 case GATTS_REQ_TYPE_READ:
192 status = GATT_READ_NOT_PERMIT;
193 break;
194
195 case GATTS_REQ_TYPE_WRITE:
196 status = GATT_WRITE_NOT_PERMIT;
197 break;
198
199 case GATTS_REQ_TYPE_WRITE_EXEC:
200 case GATT_CMD_WRITE:
201 ignore = TRUE;
202 GATT_TRACE_EVENT("Ignore GATT_REQ_EXEC_WRITE/WRITE_CMD" );
203 break;
204
205 case GATTS_REQ_TYPE_MTU:
206 GATT_TRACE_EVENT("Get MTU exchange new mtu size: %d", p_data->mtu);
207 ignore = TRUE;
208 break;
209
210 default:
211 GATT_TRACE_EVENT("Unknown/unexpected LE GAP ATT request: 0x%02x", type);
212 break;
213 }
214
215 if (!ignore)
216 GATTS_SendRsp (conn_id, trans_id, status, &rsp_msg);
217
218 }
219
220 /*******************************************************************************
221 **
222 ** Function gatt_connect_cback
223 **
224 ** Description Gatt profile connection callback.
225 **
226 ** Returns void
227 **
228 *******************************************************************************/
gatt_connect_cback(tGATT_IF gatt_if,BD_ADDR bda,UINT16 conn_id,BOOLEAN connected,tGATT_DISCONN_REASON reason,tBT_TRANSPORT transport)229 static void gatt_connect_cback (tGATT_IF gatt_if, BD_ADDR bda, UINT16 conn_id,
230 BOOLEAN connected, tGATT_DISCONN_REASON reason,
231 tBT_TRANSPORT transport)
232 {
233 UNUSED(gatt_if);
234
235 GATT_TRACE_EVENT ("%s: from %08x%04x connected:%d conn_id=%d reason = 0x%04x", __FUNCTION__,
236 (bda[0]<<24)+(bda[1]<<16)+(bda[2]<<8)+bda[3],
237 (bda[4]<<8)+bda[5], connected, conn_id, reason);
238
239 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_bd_addr(bda, transport);
240 if (p_clcb == NULL)
241 return;
242
243 if (connected)
244 {
245 p_clcb->conn_id = conn_id;
246 p_clcb->connected = TRUE;
247
248 if (p_clcb->ccc_stage == GATT_SVC_CHANGED_CONNECTING)
249 {
250 p_clcb->ccc_stage ++;
251 gatt_cl_start_config_ccc(p_clcb);
252 }
253 } else {
254 gatt_profile_clcb_dealloc(p_clcb);
255 }
256 }
257
258 /*******************************************************************************
259 **
260 ** Function gatt_profile_db_init
261 **
262 ** Description Initializa the GATT profile attribute database.
263 **
264 *******************************************************************************/
gatt_profile_db_init(void)265 void gatt_profile_db_init (void)
266 {
267 tBT_UUID app_uuid = {LEN_UUID_128, {0}};
268 tBT_UUID uuid = {LEN_UUID_16, {UUID_SERVCLASS_GATT_SERVER}};
269 UINT16 service_handle = 0;
270 tGATT_STATUS status;
271
272 /* Fill our internal UUID with a fixed pattern 0x81 */
273 memset (&app_uuid.uu.uuid128, 0x81, LEN_UUID_128);
274
275
276 /* Create a GATT profile service */
277 gatt_cb.gatt_if = GATT_Register(&app_uuid, &gatt_profile_cback);
278 GATT_StartIf(gatt_cb.gatt_if);
279
280 service_handle = GATTS_CreateService (gatt_cb.gatt_if , &uuid, 0, GATTP_MAX_ATTR_NUM, TRUE);
281 /* add Service Changed characteristic
282 */
283 uuid.uu.uuid16 = gatt_cb.gattp_attr.uuid = GATT_UUID_GATT_SRV_CHGD;
284 gatt_cb.gattp_attr.service_change = 0;
285 gatt_cb.gattp_attr.handle =
286 gatt_cb.handle_of_h_r = GATTS_AddCharacteristic(service_handle, &uuid, 0, GATT_CHAR_PROP_BIT_INDICATE);
287
288 GATT_TRACE_DEBUG ("gatt_profile_db_init: handle of service changed%d",
289 gatt_cb.handle_of_h_r );
290
291 /* start service
292 */
293 status = GATTS_StartService (gatt_cb.gatt_if, service_handle, GATTP_TRANSPORT_SUPPORTED );
294
295 GATT_TRACE_DEBUG ("gatt_profile_db_init: gatt_if=%d start status%d",
296 gatt_cb.gatt_if, status);
297 }
298
299 /*******************************************************************************
300 **
301 ** Function gatt_config_ccc_complete
302 **
303 ** Description The function finish the service change ccc configuration
304 **
305 ** Returns void
306 **
307 *******************************************************************************/
gatt_config_ccc_complete(tGATT_PROFILE_CLCB * p_clcb)308 static void gatt_config_ccc_complete(tGATT_PROFILE_CLCB *p_clcb)
309 {
310 GATT_Disconnect(p_clcb->conn_id);
311 gatt_profile_clcb_dealloc(p_clcb);
312 }
313
314 /*******************************************************************************
315 **
316 ** Function gatt_disc_res_cback
317 **
318 ** Description Gatt profile discovery result callback
319 **
320 ** Returns void
321 **
322 *******************************************************************************/
gatt_disc_res_cback(UINT16 conn_id,tGATT_DISC_TYPE disc_type,tGATT_DISC_RES * p_data)323 static void gatt_disc_res_cback (UINT16 conn_id, tGATT_DISC_TYPE disc_type, tGATT_DISC_RES *p_data)
324 {
325 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
326
327 if (p_clcb == NULL)
328 return;
329
330 switch (disc_type)
331 {
332 case GATT_DISC_SRVC_BY_UUID:/* stage 1 */
333 p_clcb->e_handle = p_data->value.group_value.e_handle;
334 p_clcb->ccc_result ++;
335 break;
336
337 case GATT_DISC_CHAR:/* stage 2 */
338 p_clcb->s_handle = p_data->value.dclr_value.val_handle;
339 p_clcb->ccc_result ++;
340 break;
341
342 case GATT_DISC_CHAR_DSCPT: /* stage 3 */
343 if (p_data->type.uu.uuid16 == GATT_UUID_CHAR_CLIENT_CONFIG)
344 {
345 p_clcb->s_handle = p_data->handle;
346 p_clcb->ccc_result ++;
347 }
348 break;
349 }
350 }
351
352 /*******************************************************************************
353 **
354 ** Function gatt_disc_cmpl_cback
355 **
356 ** Description Gatt profile discovery complete callback
357 **
358 ** Returns void
359 **
360 *******************************************************************************/
gatt_disc_cmpl_cback(UINT16 conn_id,tGATT_DISC_TYPE disc_type,tGATT_STATUS status)361 static void gatt_disc_cmpl_cback (UINT16 conn_id, tGATT_DISC_TYPE disc_type, tGATT_STATUS status)
362 {
363 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
364
365 if (p_clcb == NULL)
366 return;
367
368 if (status == GATT_SUCCESS && p_clcb->ccc_result > 0)
369 {
370 p_clcb->ccc_result = 0;
371 p_clcb->ccc_stage ++;
372 gatt_cl_start_config_ccc(p_clcb);
373 } else {
374 GATT_TRACE_ERROR("%s() - Register for service changed indication failure", __FUNCTION__);
375 }
376 }
377
378 /*******************************************************************************
379 **
380 ** Function gatt_cl_op_cmpl_cback
381 **
382 ** Description Gatt profile client operation complete callback
383 **
384 ** Returns void
385 **
386 *******************************************************************************/
gatt_cl_op_cmpl_cback(UINT16 conn_id,tGATTC_OPTYPE op,tGATT_STATUS status,tGATT_CL_COMPLETE * p_data)387 static void gatt_cl_op_cmpl_cback (UINT16 conn_id, tGATTC_OPTYPE op,
388 tGATT_STATUS status, tGATT_CL_COMPLETE *p_data)
389 {
390 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
391
392 if (p_clcb == NULL)
393 return;
394
395 if (op == GATTC_OPTYPE_WRITE)
396 {
397 GATT_TRACE_DEBUG("%s() - ccc write status : %d", __FUNCTION__, status);
398 }
399
400 /* free the connection */
401 gatt_config_ccc_complete (p_clcb);
402 }
403
404 /*******************************************************************************
405 **
406 ** Function gatt_cl_start_config_ccc
407 **
408 ** Description Gatt profile start configure service change CCC
409 **
410 ** Returns void
411 **
412 *******************************************************************************/
gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB * p_clcb)413 static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB *p_clcb)
414 {
415 tGATT_DISC_PARAM srvc_disc_param;
416 tGATT_VALUE ccc_value;
417
418 GATT_TRACE_DEBUG("%s() - stage: %d", __FUNCTION__, p_clcb->ccc_stage);
419
420 memset (&srvc_disc_param, 0 , sizeof(tGATT_DISC_PARAM));
421 memset (&ccc_value, 0 , sizeof(tGATT_VALUE));
422
423 switch(p_clcb->ccc_stage)
424 {
425 case GATT_SVC_CHANGED_SERVICE: /* discover GATT service */
426 srvc_disc_param.s_handle = 1;
427 srvc_disc_param.e_handle = 0xffff;
428 srvc_disc_param.service.len = 2;
429 srvc_disc_param.service.uu.uuid16 = UUID_SERVCLASS_GATT_SERVER;
430 if (GATTC_Discover (p_clcb->conn_id, GATT_DISC_SRVC_BY_UUID, &srvc_disc_param) != GATT_SUCCESS)
431 {
432 GATT_TRACE_ERROR("%s() - ccc service error", __FUNCTION__);
433 gatt_config_ccc_complete(p_clcb);
434 }
435 break;
436
437 case GATT_SVC_CHANGED_CHARACTERISTIC: /* discover service change char */
438 srvc_disc_param.s_handle = 1;
439 srvc_disc_param.e_handle = p_clcb->e_handle;
440 srvc_disc_param.service.len = 2;
441 srvc_disc_param.service.uu.uuid16 = GATT_UUID_GATT_SRV_CHGD;
442 if (GATTC_Discover (p_clcb->conn_id, GATT_DISC_CHAR, &srvc_disc_param) != GATT_SUCCESS)
443 {
444 GATT_TRACE_ERROR("%s() - ccc char error", __FUNCTION__);
445 gatt_config_ccc_complete(p_clcb);
446 }
447 break;
448
449 case GATT_SVC_CHANGED_DESCRIPTOR: /* discover service change ccc */
450 srvc_disc_param.s_handle = p_clcb->s_handle;
451 srvc_disc_param.e_handle = p_clcb->e_handle;
452 if (GATTC_Discover (p_clcb->conn_id, GATT_DISC_CHAR_DSCPT, &srvc_disc_param) != GATT_SUCCESS)
453 {
454 GATT_TRACE_ERROR("%s() - ccc char descriptor error", __FUNCTION__);
455 gatt_config_ccc_complete(p_clcb);
456 }
457 break;
458
459 case GATT_SVC_CHANGED_CONFIGURE_CCCD: /* write ccc */
460 ccc_value.handle = p_clcb->s_handle;
461 ccc_value.len = 2;
462 ccc_value.value[0] = GATT_CLT_CONFIG_INDICATION;
463 if (GATTC_Write (p_clcb->conn_id, GATT_WRITE, &ccc_value) != GATT_SUCCESS)
464 {
465 GATT_TRACE_ERROR("%s() - write ccc error", __FUNCTION__);
466 gatt_config_ccc_complete(p_clcb);
467 }
468 break;
469 }
470 }
471
472 /*******************************************************************************
473 **
474 ** Function GATT_ConfigServiceChangeCCC
475 **
476 ** Description Configure service change indication on remote device
477 **
478 ** Returns none
479 **
480 *******************************************************************************/
GATT_ConfigServiceChangeCCC(BD_ADDR remote_bda,BOOLEAN enable,tBT_TRANSPORT transport)481 void GATT_ConfigServiceChangeCCC (BD_ADDR remote_bda, BOOLEAN enable, tBT_TRANSPORT transport)
482 {
483 UINT16 conn_id = GATT_INVALID_CONN_ID;
484 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_bd_addr (remote_bda, transport);
485
486 if (p_clcb == NULL)
487 p_clcb = gatt_profile_clcb_alloc (0, remote_bda, transport);
488
489 if (p_clcb == NULL)
490 return;
491
492 if (GATT_GetConnIdIfConnected (gatt_cb.gatt_if, remote_bda, &p_clcb->conn_id, transport))
493 {
494 p_clcb->connected = TRUE;
495 }
496 /* hold the link here */
497 GATT_Connect(gatt_cb.gatt_if, remote_bda, TRUE, transport);
498 p_clcb->ccc_stage = GATT_SVC_CHANGED_CONNECTING;
499
500 if (!p_clcb->connected)
501 {
502 /* wait for connection */
503 return;
504 }
505
506 p_clcb->ccc_stage ++;
507 gatt_cl_start_config_ccc(p_clcb);
508 }
509
510 #endif /* BLE_INCLUDED */
511