1 /******************************************************************************
2 *
3 * Copyright 2003-2012 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 GATT client main functions and state machine.
22 *
23 ******************************************************************************/
24
25 #include <base/strings/stringprintf.h>
26
27 #include "bt_target.h" // Must be first to define build configuration"
28
29 #include "bta/gatt/bta_gattc_int.h"
30
31 using base::StringPrintf;
32
33 /*****************************************************************************
34 * Constants and types
35 ****************************************************************************/
36
37 /* state machine action enumeration list */
38 enum {
39 BTA_GATTC_OPEN,
40 BTA_GATTC_OPEN_FAIL,
41 BTA_GATTC_OPEN_ERROR,
42 BTA_GATTC_CANCEL_OPEN,
43 BTA_GATTC_CANCEL_OPEN_OK,
44 BTA_GATTC_CANCEL_OPEN_ERROR,
45 BTA_GATTC_CONN,
46 BTA_GATTC_START_DISCOVER,
47 BTA_GATTC_DISC_CMPL,
48 BTA_GATTC_Q_CMD,
49 BTA_GATTC_CLOSE,
50 BTA_GATTC_CLOSE_FAIL,
51 BTA_GATTC_READ,
52 BTA_GATTC_WRITE,
53 BTA_GATTC_OP_CMPL,
54 BTA_GATTC_SEARCH,
55 BTA_GATTC_FAIL,
56 BTA_GATTC_CONFIRM,
57 BTA_GATTC_EXEC,
58 BTA_GATTC_READ_MULTI,
59 BTA_GATTC_OP_CMPL_DURING_DISCOVERY,
60 BTA_GATTC_DISC_CLOSE,
61 BTA_GATTC_RESTART_DISCOVER,
62 BTA_GATTC_CFG_MTU,
63
64 BTA_GATTC_IGNORE
65 };
66 /* type for action functions */
67 typedef void (*tBTA_GATTC_ACTION)(tBTA_GATTC_CLCB* p_clcb,
68 const tBTA_GATTC_DATA* p_data);
69
70 /* action function list */
71 const tBTA_GATTC_ACTION bta_gattc_action[] = {
72 bta_gattc_open, /* BTA_GATTC_OPEN */
73 bta_gattc_open_fail, /* BTA_GATTC_OPEN_FAIL */
74 bta_gattc_open_error, /* BTA_GATTC_OPEN_ERROR */
75 bta_gattc_cancel_open, /* BTA_GATTC_CANCEL_OPEN */
76 bta_gattc_cancel_open_ok, /* BTA_GATTC_CANCEL_OPEN_OK */
77 bta_gattc_cancel_open_error, /* BTA_GATTC_CANCEL_OPEN_ERROR */
78 bta_gattc_conn, /* BTA_GATTC_CONN */
79 bta_gattc_start_discover, /* BTA_GATTC_START_DISCOVER */
80 bta_gattc_disc_cmpl, /* BTA_GATTC_DISC_CMPL */
81 bta_gattc_q_cmd, /* BTA_GATTC_Q_CMD */
82 bta_gattc_close, /* BTA_GATTC_CLOSE */
83 bta_gattc_close_fail, /* BTA_GATTC_CLOSE_FAIL */
84 bta_gattc_read, /* BTA_GATTC_READ */
85 bta_gattc_write, /* BTA_GATTC_WRITE */
86 bta_gattc_op_cmpl, /* BTA_GATTC_OP_CMPL */
87 bta_gattc_search, /* BTA_GATTC_SEARCH */
88 bta_gattc_fail, /* BTA_GATTC_FAIL */
89 bta_gattc_confirm, /* BTA_GATTC_CONFIRM */
90 bta_gattc_execute, /* BTA_GATTC_EXEC */
91 bta_gattc_read_multi, /* BTA_GATTC_READ_MULTI */
92 bta_gattc_op_cmpl_during_discovery, /* BTA_GATTC_OP_CMPL_DURING_DISCOVERY */
93 bta_gattc_disc_close, /* BTA_GATTC_DISC_CLOSE */
94 bta_gattc_restart_discover, /* BTA_GATTC_RESTART_DISCOVER */
95 bta_gattc_cfg_mtu /* BTA_GATTC_CFG_MTU */
96 };
97
98 /* state table information */
99 #define BTA_GATTC_ACTIONS 1 /* number of actions */
100 #define BTA_GATTC_NEXT_STATE 1 /* position of next state */
101 #define BTA_GATTC_NUM_COLS 2 /* number of columns in state tables */
102
103 /* state table for idle state */
104 static const uint8_t bta_gattc_st_idle[][BTA_GATTC_NUM_COLS] = {
105 /* Event Action 1 Next state */
106 /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN,
107 BTA_GATTC_W4_CONN_ST},
108 /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_IGNORE,
109 BTA_GATTC_IDLE_ST},
110 /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_IGNORE,
111 BTA_GATTC_IDLE_ST},
112 /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_IGNORE,
113 BTA_GATTC_IDLE_ST},
114
115 /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
116 /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
117 /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
118 /* BTA_GATTC_API_CFG_MTU_EVT */ {BTA_GATTC_IGNORE,
119 BTA_GATTC_IDLE_ST},
120
121 /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_CLOSE_FAIL,
122 BTA_GATTC_IDLE_ST},
123
124 /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
125 /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
126 /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
127
128 /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_CONN, BTA_GATTC_CONN_ST},
129 /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_IGNORE,
130 BTA_GATTC_IDLE_ST},
131 /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_IGNORE,
132 BTA_GATTC_IDLE_ST},
133 /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_IGNORE,
134 BTA_GATTC_IDLE_ST},
135 /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST},
136
137 };
138
139 /* state table for wait for open state */
140 static const uint8_t bta_gattc_st_w4_conn[][BTA_GATTC_NUM_COLS] = {
141 /* Event Action 1 Next state */
142 /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN,
143 BTA_GATTC_W4_CONN_ST},
144 /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_OPEN_FAIL,
145 BTA_GATTC_IDLE_ST},
146 /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_CANCEL_OPEN,
147 BTA_GATTC_W4_CONN_ST},
148 /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_CANCEL_OPEN_OK,
149 BTA_GATTC_IDLE_ST},
150
151 /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_FAIL,
152 BTA_GATTC_W4_CONN_ST},
153 /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_FAIL,
154 BTA_GATTC_W4_CONN_ST},
155 /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_FAIL,
156 BTA_GATTC_W4_CONN_ST},
157 /* BTA_GATTC_API_CFG_MTU_EVT */ {BTA_GATTC_IGNORE,
158 BTA_GATTC_W4_CONN_ST},
159
160 /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_CANCEL_OPEN,
161 BTA_GATTC_W4_CONN_ST},
162
163 /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_FAIL,
164 BTA_GATTC_W4_CONN_ST},
165 /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_FAIL,
166 BTA_GATTC_W4_CONN_ST},
167 /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_FAIL,
168 BTA_GATTC_W4_CONN_ST},
169
170 /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_CONN, BTA_GATTC_CONN_ST},
171 /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_IGNORE,
172 BTA_GATTC_W4_CONN_ST},
173 /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_IGNORE,
174 BTA_GATTC_W4_CONN_ST},
175 /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_IGNORE,
176 BTA_GATTC_W4_CONN_ST},
177 /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_OPEN_FAIL,
178 BTA_GATTC_IDLE_ST},
179
180 };
181
182 /* state table for open state */
183 static const uint8_t bta_gattc_st_connected[][BTA_GATTC_NUM_COLS] = {
184 /* Event Action 1 Next state */
185 /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN, BTA_GATTC_CONN_ST},
186 /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_IGNORE,
187 BTA_GATTC_CONN_ST},
188 /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_CANCEL_OPEN_ERROR,
189 BTA_GATTC_CONN_ST},
190 /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_IGNORE,
191 BTA_GATTC_CONN_ST},
192
193 /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_READ, BTA_GATTC_CONN_ST},
194 /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_WRITE, BTA_GATTC_CONN_ST},
195 /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_EXEC, BTA_GATTC_CONN_ST},
196 /* BTA_GATTC_API_CFG_MTU_EVT */ {BTA_GATTC_CFG_MTU,
197 BTA_GATTC_CONN_ST},
198
199 /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_CLOSE, BTA_GATTC_IDLE_ST},
200
201 /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_SEARCH,
202 BTA_GATTC_CONN_ST},
203 /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_CONFIRM,
204 BTA_GATTC_CONN_ST},
205 /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_READ_MULTI,
206 BTA_GATTC_CONN_ST},
207
208 /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_IGNORE,
209 BTA_GATTC_CONN_ST},
210 /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_START_DISCOVER,
211 BTA_GATTC_DISCOVER_ST},
212 /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_IGNORE,
213 BTA_GATTC_CONN_ST},
214 /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_OP_CMPL,
215 BTA_GATTC_CONN_ST},
216
217 /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_CLOSE, BTA_GATTC_IDLE_ST},
218
219 };
220
221 /* state table for discover state */
222 static const uint8_t bta_gattc_st_discover[][BTA_GATTC_NUM_COLS] = {
223 /* Event Action 1 Next state */
224 /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN,
225 BTA_GATTC_DISCOVER_ST},
226 /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_IGNORE,
227 BTA_GATTC_DISCOVER_ST},
228 /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_CANCEL_OPEN_ERROR,
229 BTA_GATTC_DISCOVER_ST},
230 /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_FAIL,
231 BTA_GATTC_DISCOVER_ST},
232
233 /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_Q_CMD,
234 BTA_GATTC_DISCOVER_ST},
235 /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_Q_CMD,
236 BTA_GATTC_DISCOVER_ST},
237 /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_Q_CMD,
238 BTA_GATTC_DISCOVER_ST},
239 /* BTA_GATTC_API_CFG_MTU_EVT */ {BTA_GATTC_Q_CMD,
240 BTA_GATTC_DISCOVER_ST},
241
242 /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_DISC_CLOSE,
243 BTA_GATTC_DISCOVER_ST},
244
245 /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_Q_CMD,
246 BTA_GATTC_DISCOVER_ST},
247 /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_CONFIRM,
248 BTA_GATTC_DISCOVER_ST},
249 /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_Q_CMD,
250 BTA_GATTC_DISCOVER_ST},
251
252 /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_CONN,
253 BTA_GATTC_DISCOVER_ST},
254 /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_RESTART_DISCOVER,
255 BTA_GATTC_DISCOVER_ST},
256 /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_DISC_CMPL,
257 BTA_GATTC_CONN_ST},
258 /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_OP_CMPL_DURING_DISCOVERY,
259 BTA_GATTC_DISCOVER_ST},
260 /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_CLOSE, BTA_GATTC_IDLE_ST},
261
262 };
263
264 /* type for state table */
265 typedef const uint8_t (*tBTA_GATTC_ST_TBL)[BTA_GATTC_NUM_COLS];
266
267 /* state table */
268 const tBTA_GATTC_ST_TBL bta_gattc_st_tbl[] = {
269 bta_gattc_st_idle, /* BTA_GATTC_IDLE_ST */
270 bta_gattc_st_w4_conn, /* BTA_GATTC_W4_CONN_ST */
271 bta_gattc_st_connected, /* BTA_GATTC_CONN_ST */
272 bta_gattc_st_discover /* BTA_GATTC_DISCOVER_ST */
273 };
274
275 /*****************************************************************************
276 * Global data
277 ****************************************************************************/
278
279 /* GATTC control block */
280 tBTA_GATTC_CB bta_gattc_cb;
281
282 #if (BTA_GATT_DEBUG == TRUE)
283 static const char* gattc_evt_code(tBTA_GATTC_INT_EVT evt_code);
284 static const char* gattc_state_code(tBTA_GATTC_STATE state_code);
285 #endif
286
287 /*******************************************************************************
288 *
289 * Function bta_gattc_sm_execute
290 *
291 * Description State machine event handling function for GATTC
292 *
293 *
294 * Returns bool : true if queued client request buffer can be
295 * immediately released, else false
296 *
297 ******************************************************************************/
bta_gattc_sm_execute(tBTA_GATTC_CLCB * p_clcb,uint16_t event,const tBTA_GATTC_DATA * p_data)298 bool bta_gattc_sm_execute(tBTA_GATTC_CLCB* p_clcb, uint16_t event,
299 const tBTA_GATTC_DATA* p_data) {
300 tBTA_GATTC_ST_TBL state_table;
301 uint8_t action;
302 int i;
303 bool rt = true;
304 tBTA_GATTC_STATE in_state = p_clcb->state;
305 uint16_t in_event = event;
306 #if (BTA_GATT_DEBUG == TRUE)
307 VLOG(1) << StringPrintf("%s: State 0x%02x [%s], Event 0x%x[%s]", __func__,
308 in_state, gattc_state_code(in_state), in_event,
309 gattc_evt_code(in_event));
310 #else
311 VLOG(1) << StringPrintf("%s: State 0x%02x, Event 0x%x", __func__, in_state,
312 in_event);
313 #endif
314
315 /* look up the state table for the current state */
316 state_table = bta_gattc_st_tbl[p_clcb->state];
317
318 event &= 0x00FF;
319
320 /* set next state */
321 p_clcb->state = state_table[event][BTA_GATTC_NEXT_STATE];
322
323 /* execute action functions */
324 for (i = 0; i < BTA_GATTC_ACTIONS; i++) {
325 action = state_table[event][i];
326 if (action != BTA_GATTC_IGNORE) {
327 (*bta_gattc_action[action])(p_clcb, p_data);
328 if (p_clcb->p_q_cmd == p_data) {
329 /* buffer is queued, don't free in the bta dispatcher.
330 * we free it ourselves when a completion event is received.
331 */
332 rt = false;
333 }
334 } else {
335 break;
336 }
337 }
338
339 #if (BTA_GATT_DEBUG == TRUE)
340 if (in_state != p_clcb->state) {
341 VLOG(1) << StringPrintf("GATTC State Change: [%s] -> [%s] after Event [%s]",
342 gattc_state_code(in_state),
343 gattc_state_code(p_clcb->state),
344 gattc_evt_code(in_event));
345 }
346 #else
347 VLOG(1) << StringPrintf(
348 "%s: GATTC State Change: 0x%02x -> 0x%02x after Event 0x%x", __func__,
349 in_state, p_clcb->state, in_event);
350 #endif
351 return rt;
352 }
353
354 /*******************************************************************************
355 *
356 * Function bta_gattc_hdl_event
357 *
358 * Description GATT client main event handling function.
359 *
360 *
361 * Returns bool
362 *
363 ******************************************************************************/
bta_gattc_hdl_event(BT_HDR_RIGID * p_msg)364 bool bta_gattc_hdl_event(BT_HDR_RIGID* p_msg) {
365 tBTA_GATTC_CLCB* p_clcb = NULL;
366 bool rt = true;
367 #if (BTA_GATT_DEBUG == TRUE)
368 VLOG(1) << __func__ << ": Event:" << gattc_evt_code(p_msg->event);
369 #endif
370 switch (p_msg->event) {
371
372 case BTA_GATTC_API_OPEN_EVT:
373 bta_gattc_process_api_open((tBTA_GATTC_DATA*)p_msg);
374 break;
375
376 case BTA_GATTC_API_CANCEL_OPEN_EVT:
377 bta_gattc_process_api_open_cancel((tBTA_GATTC_DATA*)p_msg);
378 break;
379
380 default:
381 if (p_msg->event == BTA_GATTC_INT_CONN_EVT)
382 p_clcb = bta_gattc_find_int_conn_clcb((tBTA_GATTC_DATA*)p_msg);
383 else if (p_msg->event == BTA_GATTC_INT_DISCONN_EVT)
384 p_clcb = bta_gattc_find_int_disconn_clcb((tBTA_GATTC_DATA*)p_msg);
385 else
386 p_clcb = bta_gattc_find_clcb_by_conn_id(p_msg->layer_specific);
387
388 if (p_clcb != NULL) {
389 rt = bta_gattc_sm_execute(p_clcb, p_msg->event,
390 (const tBTA_GATTC_DATA*)p_msg);
391 } else {
392 VLOG(1) << "Ignore unknown conn ID: " << +p_msg->layer_specific;
393 }
394
395 break;
396 }
397
398 return rt;
399 }
400
401 /*****************************************************************************
402 * Debug Functions
403 ****************************************************************************/
404 #if (BTA_GATT_DEBUG == TRUE)
405
406 /*******************************************************************************
407 *
408 * Function gattc_evt_code
409 *
410 * Description
411 *
412 * Returns void
413 *
414 ******************************************************************************/
gattc_evt_code(tBTA_GATTC_INT_EVT evt_code)415 static const char* gattc_evt_code(tBTA_GATTC_INT_EVT evt_code) {
416 switch (evt_code) {
417 case BTA_GATTC_API_OPEN_EVT:
418 return "BTA_GATTC_API_OPEN_EVT";
419 case BTA_GATTC_INT_OPEN_FAIL_EVT:
420 return "BTA_GATTC_INT_OPEN_FAIL_EVT";
421 case BTA_GATTC_API_CANCEL_OPEN_EVT:
422 return "BTA_GATTC_API_CANCEL_OPEN_EVT";
423 case BTA_GATTC_INT_CANCEL_OPEN_OK_EVT:
424 return "BTA_GATTC_INT_CANCEL_OPEN_OK_EVT";
425 case BTA_GATTC_API_READ_EVT:
426 return "BTA_GATTC_API_READ_EVT";
427 case BTA_GATTC_API_WRITE_EVT:
428 return "BTA_GATTC_API_WRITE_EVT";
429 case BTA_GATTC_API_EXEC_EVT:
430 return "BTA_GATTC_API_EXEC_EVT";
431 case BTA_GATTC_API_CLOSE_EVT:
432 return "BTA_GATTC_API_CLOSE_EVT";
433 case BTA_GATTC_API_SEARCH_EVT:
434 return "BTA_GATTC_API_SEARCH_EVT";
435 case BTA_GATTC_API_CONFIRM_EVT:
436 return "BTA_GATTC_API_CONFIRM_EVT";
437 case BTA_GATTC_API_READ_MULTI_EVT:
438 return "BTA_GATTC_API_READ_MULTI_EVT";
439 case BTA_GATTC_INT_CONN_EVT:
440 return "BTA_GATTC_INT_CONN_EVT";
441 case BTA_GATTC_INT_DISCOVER_EVT:
442 return "BTA_GATTC_INT_DISCOVER_EVT";
443 case BTA_GATTC_DISCOVER_CMPL_EVT:
444 return "BTA_GATTC_DISCOVER_CMPL_EVT";
445 case BTA_GATTC_OP_CMPL_EVT:
446 return "BTA_GATTC_OP_CMPL_EVT";
447 case BTA_GATTC_INT_DISCONN_EVT:
448 return "BTA_GATTC_INT_DISCONN_EVT";
449 case BTA_GATTC_API_CFG_MTU_EVT:
450 return "BTA_GATTC_API_CFG_MTU_EVT";
451 default:
452 return "unknown GATTC event code";
453 }
454 }
455
456 /*******************************************************************************
457 *
458 * Function gattc_state_code
459 *
460 * Description
461 *
462 * Returns void
463 *
464 ******************************************************************************/
gattc_state_code(tBTA_GATTC_STATE state_code)465 static const char* gattc_state_code(tBTA_GATTC_STATE state_code) {
466 switch (state_code) {
467 case BTA_GATTC_IDLE_ST:
468 return "GATTC_IDLE_ST";
469 case BTA_GATTC_W4_CONN_ST:
470 return "GATTC_W4_CONN_ST";
471 case BTA_GATTC_CONN_ST:
472 return "GATTC_CONN_ST";
473 case BTA_GATTC_DISCOVER_ST:
474 return "GATTC_DISCOVER_ST";
475 default:
476 return "unknown GATTC state code";
477 }
478 }
479
480 #endif /* Debug Functions */
481