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 NULL;
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 NULL;
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 if(i_clcb < GATT_MAX_APPS)
155 return p_clcb;
156
157 return NULL;
158 }
159
160 /*******************************************************************************
161 **
162 ** Function gatt_profile_clcb_dealloc
163 **
164 ** Description The function deallocates a GATT profile connection link control block
165 **
166 ** Returns void
167 **
168 *******************************************************************************/
gatt_profile_clcb_dealloc(tGATT_PROFILE_CLCB * p_clcb)169 void gatt_profile_clcb_dealloc (tGATT_PROFILE_CLCB *p_clcb)
170 {
171 memset(p_clcb, 0, sizeof(tGATT_PROFILE_CLCB));
172 }
173
174 /*******************************************************************************
175 **
176 ** Function gatt_request_cback
177 **
178 ** Description GATT profile attribute access request callback.
179 **
180 ** Returns void.
181 **
182 *******************************************************************************/
gatt_request_cback(UINT16 conn_id,UINT32 trans_id,tGATTS_REQ_TYPE type,tGATTS_DATA * p_data)183 static void gatt_request_cback (UINT16 conn_id, UINT32 trans_id, tGATTS_REQ_TYPE type,
184 tGATTS_DATA *p_data)
185 {
186 UINT8 status = GATT_INVALID_PDU;
187 tGATTS_RSP rsp_msg ;
188 BOOLEAN ignore = FALSE;
189
190 memset(&rsp_msg, 0, sizeof(tGATTS_RSP));
191
192 switch (type)
193 {
194 case GATTS_REQ_TYPE_READ:
195 status = GATT_READ_NOT_PERMIT;
196 break;
197
198 case GATTS_REQ_TYPE_WRITE:
199 status = GATT_WRITE_NOT_PERMIT;
200 break;
201
202 case GATTS_REQ_TYPE_WRITE_EXEC:
203 case GATT_CMD_WRITE:
204 ignore = TRUE;
205 GATT_TRACE_EVENT("Ignore GATT_REQ_EXEC_WRITE/WRITE_CMD" );
206 break;
207
208 case GATTS_REQ_TYPE_MTU:
209 GATT_TRACE_EVENT("Get MTU exchange new mtu size: %d", p_data->mtu);
210 ignore = TRUE;
211 break;
212
213 default:
214 GATT_TRACE_EVENT("Unknown/unexpected LE GAP ATT request: 0x%02x", type);
215 break;
216 }
217
218 if (!ignore)
219 GATTS_SendRsp (conn_id, trans_id, status, &rsp_msg);
220
221 }
222
223 /*******************************************************************************
224 **
225 ** Function gatt_connect_cback
226 **
227 ** Description Gatt profile connection callback.
228 **
229 ** Returns void
230 **
231 *******************************************************************************/
gatt_connect_cback(tGATT_IF gatt_if,BD_ADDR bda,UINT16 conn_id,BOOLEAN connected,tGATT_DISCONN_REASON reason,tBT_TRANSPORT transport)232 static void gatt_connect_cback (tGATT_IF gatt_if, BD_ADDR bda, UINT16 conn_id,
233 BOOLEAN connected, tGATT_DISCONN_REASON reason,
234 tBT_TRANSPORT transport)
235 {
236 UNUSED(gatt_if);
237
238 GATT_TRACE_EVENT("%s: from %08x%04x connected:%d conn_id=%d reason = 0x%04x", __func__,
239 (bda[0]<<24)+(bda[1]<<16)+(bda[2]<<8)+bda[3],
240 (bda[4]<<8)+bda[5], connected, conn_id, reason);
241
242 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_bd_addr(bda, transport);
243 if (connected) {
244 if (p_clcb == NULL)
245 p_clcb = gatt_profile_clcb_alloc(conn_id, bda, transport);
246
247 if (p_clcb == NULL)
248 return;
249
250 p_clcb->connected = TRUE;
251 p_clcb->ccc_stage = GATT_SVC_CHANGED_SERVICE;
252 gatt_cl_start_config_ccc(p_clcb);
253 } else {
254 if (p_clcb != NULL)
255 gatt_profile_clcb_dealloc(p_clcb);
256 }
257 }
258
259 /*******************************************************************************
260 **
261 ** Function gatt_profile_db_init
262 **
263 ** Description Initializa the GATT profile attribute database.
264 **
265 *******************************************************************************/
gatt_profile_db_init(void)266 void gatt_profile_db_init (void)
267 {
268 tBT_UUID app_uuid = {LEN_UUID_128, {0}};
269 tBT_UUID uuid = {LEN_UUID_16, {UUID_SERVCLASS_GATT_SERVER}};
270 UINT16 service_handle = 0;
271 tGATT_STATUS status;
272
273 /* Fill our internal UUID with a fixed pattern 0x81 */
274 memset (&app_uuid.uu.uuid128, 0x81, LEN_UUID_128);
275
276
277 /* Create a GATT profile service */
278 gatt_cb.gatt_if = GATT_Register(&app_uuid, &gatt_profile_cback);
279 GATT_StartIf(gatt_cb.gatt_if);
280
281 service_handle = GATTS_CreateService (gatt_cb.gatt_if , &uuid, 0, GATTP_MAX_ATTR_NUM, TRUE);
282 /* add Service Changed characteristic
283 */
284 uuid.uu.uuid16 = gatt_cb.gattp_attr.uuid = GATT_UUID_GATT_SRV_CHGD;
285 gatt_cb.gattp_attr.service_change = 0;
286 gatt_cb.gattp_attr.handle =
287 gatt_cb.handle_of_h_r = GATTS_AddCharacteristic(service_handle, &uuid, 0, GATT_CHAR_PROP_BIT_INDICATE);
288
289 GATT_TRACE_DEBUG ("gatt_profile_db_init: handle of service changed%d",
290 gatt_cb.handle_of_h_r );
291
292 /* start service
293 */
294 status = GATTS_StartService (gatt_cb.gatt_if, service_handle, GATTP_TRANSPORT_SUPPORTED );
295
296 GATT_TRACE_DEBUG ("gatt_profile_db_init: gatt_if=%d start status%d",
297 gatt_cb.gatt_if, status);
298 }
299
300 /*******************************************************************************
301 **
302 ** Function gatt_disc_res_cback
303 **
304 ** Description Gatt profile discovery result callback
305 **
306 ** Returns void
307 **
308 *******************************************************************************/
gatt_disc_res_cback(UINT16 conn_id,tGATT_DISC_TYPE disc_type,tGATT_DISC_RES * p_data)309 static void gatt_disc_res_cback (UINT16 conn_id, tGATT_DISC_TYPE disc_type, tGATT_DISC_RES *p_data)
310 {
311 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
312
313 if (p_clcb == NULL)
314 return;
315
316 switch (disc_type)
317 {
318 case GATT_DISC_SRVC_BY_UUID:/* stage 1 */
319 p_clcb->e_handle = p_data->value.group_value.e_handle;
320 p_clcb->ccc_result ++;
321 break;
322
323 case GATT_DISC_CHAR:/* stage 2 */
324 p_clcb->s_handle = p_data->value.dclr_value.val_handle;
325 p_clcb->ccc_result ++;
326 break;
327
328 case GATT_DISC_CHAR_DSCPT: /* stage 3 */
329 if (p_data->type.uu.uuid16 == GATT_UUID_CHAR_CLIENT_CONFIG)
330 {
331 p_clcb->s_handle = p_data->handle;
332 p_clcb->ccc_result ++;
333 }
334 break;
335 }
336 }
337
338 /*******************************************************************************
339 **
340 ** Function gatt_disc_cmpl_cback
341 **
342 ** Description Gatt profile discovery complete callback
343 **
344 ** Returns void
345 **
346 *******************************************************************************/
gatt_disc_cmpl_cback(UINT16 conn_id,tGATT_DISC_TYPE disc_type,tGATT_STATUS status)347 static void gatt_disc_cmpl_cback (UINT16 conn_id, tGATT_DISC_TYPE disc_type, tGATT_STATUS status)
348 {
349 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_conn_id(conn_id);
350
351 if (p_clcb == NULL)
352 return;
353
354 if (status == GATT_SUCCESS && p_clcb->ccc_result > 0)
355 {
356 p_clcb->ccc_result = 0;
357 p_clcb->ccc_stage ++;
358 gatt_cl_start_config_ccc(p_clcb);
359 } else {
360 GATT_TRACE_ERROR("%s() - Unable to register for service changed indication", __func__);
361 }
362 }
363
364 /*******************************************************************************
365 **
366 ** Function gatt_cl_op_cmpl_cback
367 **
368 ** Description Gatt profile client operation complete callback
369 **
370 ** Returns void
371 **
372 *******************************************************************************/
gatt_cl_op_cmpl_cback(UINT16 conn_id,tGATTC_OPTYPE op,tGATT_STATUS status,tGATT_CL_COMPLETE * p_data)373 static void gatt_cl_op_cmpl_cback (UINT16 conn_id, tGATTC_OPTYPE op,
374 tGATT_STATUS status, tGATT_CL_COMPLETE *p_data)
375 {
376 UNUSED(conn_id);
377 UNUSED(op);
378 UNUSED(status);
379 UNUSED(p_data);
380 }
381
382 /*******************************************************************************
383 **
384 ** Function gatt_cl_start_config_ccc
385 **
386 ** Description Gatt profile start configure service change CCC
387 **
388 ** Returns void
389 **
390 *******************************************************************************/
gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB * p_clcb)391 static void gatt_cl_start_config_ccc(tGATT_PROFILE_CLCB *p_clcb)
392 {
393 tGATT_DISC_PARAM srvc_disc_param;
394 tGATT_VALUE ccc_value;
395
396 GATT_TRACE_DEBUG("%s() - stage: %d", __FUNCTION__, p_clcb->ccc_stage);
397
398 memset (&srvc_disc_param, 0 , sizeof(tGATT_DISC_PARAM));
399 memset (&ccc_value, 0 , sizeof(tGATT_VALUE));
400
401 switch(p_clcb->ccc_stage)
402 {
403 case GATT_SVC_CHANGED_SERVICE: /* discover GATT service */
404 srvc_disc_param.s_handle = 1;
405 srvc_disc_param.e_handle = 0xffff;
406 srvc_disc_param.service.len = 2;
407 srvc_disc_param.service.uu.uuid16 = UUID_SERVCLASS_GATT_SERVER;
408 GATTC_Discover(p_clcb->conn_id, GATT_DISC_SRVC_BY_UUID, &srvc_disc_param);
409 break;
410
411 case GATT_SVC_CHANGED_CHARACTERISTIC: /* discover service change char */
412 srvc_disc_param.s_handle = 1;
413 srvc_disc_param.e_handle = p_clcb->e_handle;
414 srvc_disc_param.service.len = 2;
415 srvc_disc_param.service.uu.uuid16 = GATT_UUID_GATT_SRV_CHGD;
416 GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR, &srvc_disc_param);
417 break;
418
419 case GATT_SVC_CHANGED_DESCRIPTOR: /* discover service change ccc */
420 srvc_disc_param.s_handle = p_clcb->s_handle;
421 srvc_disc_param.e_handle = p_clcb->e_handle;
422 GATTC_Discover(p_clcb->conn_id, GATT_DISC_CHAR_DSCPT, &srvc_disc_param);
423 break;
424
425 case GATT_SVC_CHANGED_CONFIGURE_CCCD: /* write ccc */
426 ccc_value.handle = p_clcb->s_handle;
427 ccc_value.len = 2;
428 ccc_value.value[0] = GATT_CLT_CONFIG_INDICATION;
429 GATTC_Write(p_clcb->conn_id, GATT_WRITE, &ccc_value);
430 break;
431 }
432 }
433
434 /*******************************************************************************
435 **
436 ** Function GATT_ConfigServiceChangeCCC
437 **
438 ** Description Configure service change indication on remote device
439 **
440 ** Returns none
441 **
442 *******************************************************************************/
GATT_ConfigServiceChangeCCC(BD_ADDR remote_bda,BOOLEAN enable,tBT_TRANSPORT transport)443 void GATT_ConfigServiceChangeCCC (BD_ADDR remote_bda, BOOLEAN enable, tBT_TRANSPORT transport)
444 {
445 tGATT_PROFILE_CLCB *p_clcb = gatt_profile_find_clcb_by_bd_addr (remote_bda, transport);
446
447 if (p_clcb == NULL)
448 p_clcb = gatt_profile_clcb_alloc (0, remote_bda, transport);
449
450 if (p_clcb == NULL)
451 return;
452
453 if (GATT_GetConnIdIfConnected (gatt_cb.gatt_if, remote_bda, &p_clcb->conn_id, transport))
454 {
455 p_clcb->connected = TRUE;
456 }
457 /* hold the link here */
458 GATT_Connect(gatt_cb.gatt_if, remote_bda, TRUE, transport);
459 p_clcb->ccc_stage = GATT_SVC_CHANGED_CONNECTING;
460
461 if (!p_clcb->connected)
462 {
463 /* wait for connection */
464 return;
465 }
466
467 p_clcb->ccc_stage ++;
468 gatt_cl_start_config_ccc(p_clcb);
469 }
470
471 #endif /* BLE_INCLUDED */
472