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 "bt_target.h"
26
27 #include <string.h>
28
29 #include "bt_common.h"
30 #include "bta_gattc_int.h"
31
32 using base::StringPrintf;
33
34 /*****************************************************************************
35 * Constants and types
36 ****************************************************************************/
37
38 /* state machine action enumeration list */
39 enum {
40 BTA_GATTC_OPEN,
41 BTA_GATTC_OPEN_FAIL,
42 BTA_GATTC_OPEN_ERROR,
43 BTA_GATTC_CANCEL_OPEN,
44 BTA_GATTC_CANCEL_OPEN_OK,
45 BTA_GATTC_CANCEL_OPEN_ERROR,
46 BTA_GATTC_CONN,
47 BTA_GATTC_START_DISCOVER,
48 BTA_GATTC_DISC_CMPL,
49 BTA_GATTC_Q_CMD,
50 BTA_GATTC_CLOSE,
51 BTA_GATTC_CLOSE_FAIL,
52 BTA_GATTC_READ,
53 BTA_GATTC_WRITE,
54 BTA_GATTC_OP_CMPL,
55 BTA_GATTC_SEARCH,
56 BTA_GATTC_FAIL,
57 BTA_GATTC_CONFIRM,
58 BTA_GATTC_EXEC,
59 BTA_GATTC_READ_MULTI,
60 BTA_GATTC_IGNORE_OP_CMPL,
61 BTA_GATTC_DISC_CLOSE,
62 BTA_GATTC_RESTART_DISCOVER,
63 BTA_GATTC_CFG_MTU,
64
65 BTA_GATTC_IGNORE
66 };
67 /* type for action functions */
68 typedef void (*tBTA_GATTC_ACTION)(tBTA_GATTC_CLCB* p_clcb,
69 tBTA_GATTC_DATA* p_data);
70
71 /* action function list */
72 const tBTA_GATTC_ACTION bta_gattc_action[] = {
73 bta_gattc_open, /* BTA_GATTC_OPEN */
74 bta_gattc_open_fail, /* BTA_GATTC_OPEN_FAIL */
75 bta_gattc_open_error, /* BTA_GATTC_OPEN_ERROR */
76 bta_gattc_cancel_open, /* BTA_GATTC_CANCEL_OPEN */
77 bta_gattc_cancel_open_ok, /* BTA_GATTC_CANCEL_OPEN_OK */
78 bta_gattc_cancel_open_error, /* BTA_GATTC_CANCEL_OPEN_ERROR */
79 bta_gattc_conn, /* BTA_GATTC_CONN */
80 bta_gattc_start_discover, /* BTA_GATTC_START_DISCOVER */
81 bta_gattc_disc_cmpl, /* BTA_GATTC_DISC_CMPL */
82 bta_gattc_q_cmd, /* BTA_GATTC_Q_CMD */
83 bta_gattc_close, /* BTA_GATTC_CLOSE */
84 bta_gattc_close_fail, /* BTA_GATTC_CLOSE_FAIL */
85 bta_gattc_read, /* BTA_GATTC_READ */
86 bta_gattc_write, /* BTA_GATTC_WRITE */
87 bta_gattc_op_cmpl, /* BTA_GATTC_OP_CMPL */
88 bta_gattc_search, /* BTA_GATTC_SEARCH */
89 bta_gattc_fail, /* BTA_GATTC_FAIL */
90 bta_gattc_confirm, /* BTA_GATTC_CONFIRM */
91 bta_gattc_execute, /* BTA_GATTC_EXEC */
92 bta_gattc_read_multi, /* BTA_GATTC_READ_MULTI */
93 bta_gattc_ignore_op_cmpl, /* BTA_GATTC_IGNORE_OP_CMPL */
94 bta_gattc_disc_close, /* BTA_GATTC_DISC_CLOSE */
95 bta_gattc_restart_discover, /* BTA_GATTC_RESTART_DISCOVER */
96 bta_gattc_cfg_mtu /* BTA_GATTC_CFG_MTU */
97 };
98
99 /* state table information */
100 #define BTA_GATTC_ACTIONS 1 /* number of actions */
101 #define BTA_GATTC_NEXT_STATE 1 /* position of next state */
102 #define BTA_GATTC_NUM_COLS 2 /* number of columns in state tables */
103
104 /* state table for idle state */
105 static const uint8_t bta_gattc_st_idle[][BTA_GATTC_NUM_COLS] = {
106 /* Event Action 1 Next state */
107 /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN,
108 BTA_GATTC_W4_CONN_ST},
109 /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_IGNORE,
110 BTA_GATTC_IDLE_ST},
111 /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_IGNORE,
112 BTA_GATTC_IDLE_ST},
113 /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_IGNORE,
114 BTA_GATTC_IDLE_ST},
115
116 /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
117 /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
118 /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
119 /* BTA_GATTC_API_CFG_MTU_EVT */ {BTA_GATTC_IGNORE,
120 BTA_GATTC_IDLE_ST},
121
122 /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_CLOSE_FAIL,
123 BTA_GATTC_IDLE_ST},
124
125 /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
126 /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
127 /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_FAIL, BTA_GATTC_IDLE_ST},
128
129 /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_CONN, BTA_GATTC_CONN_ST},
130 /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_IGNORE,
131 BTA_GATTC_IDLE_ST},
132 /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_IGNORE,
133 BTA_GATTC_IDLE_ST},
134 /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_IGNORE,
135 BTA_GATTC_IDLE_ST},
136 /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_IGNORE, BTA_GATTC_IDLE_ST},
137
138 };
139
140 /* state table for wait for open state */
141 static const uint8_t bta_gattc_st_w4_conn[][BTA_GATTC_NUM_COLS] = {
142 /* Event Action 1 Next state */
143 /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN,
144 BTA_GATTC_W4_CONN_ST},
145 /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_OPEN_FAIL,
146 BTA_GATTC_IDLE_ST},
147 /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_CANCEL_OPEN,
148 BTA_GATTC_W4_CONN_ST},
149 /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_CANCEL_OPEN_OK,
150 BTA_GATTC_IDLE_ST},
151
152 /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_FAIL,
153 BTA_GATTC_W4_CONN_ST},
154 /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_FAIL,
155 BTA_GATTC_W4_CONN_ST},
156 /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_FAIL,
157 BTA_GATTC_W4_CONN_ST},
158 /* BTA_GATTC_API_CFG_MTU_EVT */ {BTA_GATTC_IGNORE,
159 BTA_GATTC_W4_CONN_ST},
160
161 /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_CANCEL_OPEN,
162 BTA_GATTC_W4_CONN_ST},
163
164 /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_FAIL,
165 BTA_GATTC_W4_CONN_ST},
166 /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_FAIL,
167 BTA_GATTC_W4_CONN_ST},
168 /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_FAIL,
169 BTA_GATTC_W4_CONN_ST},
170
171 /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_CONN, BTA_GATTC_CONN_ST},
172 /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_IGNORE,
173 BTA_GATTC_W4_CONN_ST},
174 /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_IGNORE,
175 BTA_GATTC_W4_CONN_ST},
176 /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_IGNORE,
177 BTA_GATTC_W4_CONN_ST},
178 /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_OPEN_FAIL,
179 BTA_GATTC_IDLE_ST},
180
181 };
182
183 /* state table for open state */
184 static const uint8_t bta_gattc_st_connected[][BTA_GATTC_NUM_COLS] = {
185 /* Event Action 1 Next state */
186 /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN, BTA_GATTC_CONN_ST},
187 /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_IGNORE,
188 BTA_GATTC_CONN_ST},
189 /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_CANCEL_OPEN_ERROR,
190 BTA_GATTC_CONN_ST},
191 /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_IGNORE,
192 BTA_GATTC_CONN_ST},
193
194 /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_READ, BTA_GATTC_CONN_ST},
195 /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_WRITE, BTA_GATTC_CONN_ST},
196 /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_EXEC, BTA_GATTC_CONN_ST},
197 /* BTA_GATTC_API_CFG_MTU_EVT */ {BTA_GATTC_CFG_MTU,
198 BTA_GATTC_CONN_ST},
199
200 /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_CLOSE, BTA_GATTC_IDLE_ST},
201
202 /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_SEARCH,
203 BTA_GATTC_CONN_ST},
204 /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_CONFIRM,
205 BTA_GATTC_CONN_ST},
206 /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_READ_MULTI,
207 BTA_GATTC_CONN_ST},
208
209 /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_IGNORE,
210 BTA_GATTC_CONN_ST},
211 /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_START_DISCOVER,
212 BTA_GATTC_DISCOVER_ST},
213 /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_IGNORE,
214 BTA_GATTC_CONN_ST},
215 /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_OP_CMPL,
216 BTA_GATTC_CONN_ST},
217
218 /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_CLOSE, BTA_GATTC_IDLE_ST},
219
220 };
221
222 /* state table for discover state */
223 static const uint8_t bta_gattc_st_discover[][BTA_GATTC_NUM_COLS] = {
224 /* Event Action 1 Next state */
225 /* BTA_GATTC_API_OPEN_EVT */ {BTA_GATTC_OPEN,
226 BTA_GATTC_DISCOVER_ST},
227 /* BTA_GATTC_INT_OPEN_FAIL_EVT */ {BTA_GATTC_IGNORE,
228 BTA_GATTC_DISCOVER_ST},
229 /* BTA_GATTC_API_CANCEL_OPEN_EVT */ {BTA_GATTC_CANCEL_OPEN_ERROR,
230 BTA_GATTC_DISCOVER_ST},
231 /* BTA_GATTC_INT_CANCEL_OPEN_OK_EVT */ {BTA_GATTC_FAIL,
232 BTA_GATTC_DISCOVER_ST},
233
234 /* BTA_GATTC_API_READ_EVT */ {BTA_GATTC_Q_CMD,
235 BTA_GATTC_DISCOVER_ST},
236 /* BTA_GATTC_API_WRITE_EVT */ {BTA_GATTC_Q_CMD,
237 BTA_GATTC_DISCOVER_ST},
238 /* BTA_GATTC_API_EXEC_EVT */ {BTA_GATTC_Q_CMD,
239 BTA_GATTC_DISCOVER_ST},
240 /* BTA_GATTC_API_CFG_MTU_EVT */ {BTA_GATTC_Q_CMD,
241 BTA_GATTC_DISCOVER_ST},
242
243 /* BTA_GATTC_API_CLOSE_EVT */ {BTA_GATTC_DISC_CLOSE,
244 BTA_GATTC_DISCOVER_ST},
245
246 /* BTA_GATTC_API_SEARCH_EVT */ {BTA_GATTC_Q_CMD,
247 BTA_GATTC_DISCOVER_ST},
248 /* BTA_GATTC_API_CONFIRM_EVT */ {BTA_GATTC_CONFIRM,
249 BTA_GATTC_DISCOVER_ST},
250 /* BTA_GATTC_API_READ_MULTI_EVT */ {BTA_GATTC_Q_CMD,
251 BTA_GATTC_DISCOVER_ST},
252
253 /* BTA_GATTC_INT_CONN_EVT */ {BTA_GATTC_CONN,
254 BTA_GATTC_DISCOVER_ST},
255 /* BTA_GATTC_INT_DISCOVER_EVT */ {BTA_GATTC_RESTART_DISCOVER,
256 BTA_GATTC_DISCOVER_ST},
257 /* BTA_GATTC_DISCOVER_CMPL_EVT */ {BTA_GATTC_DISC_CMPL,
258 BTA_GATTC_CONN_ST},
259 /* BTA_GATTC_OP_CMPL_EVT */ {BTA_GATTC_IGNORE_OP_CMPL,
260 BTA_GATTC_DISCOVER_ST},
261 /* BTA_GATTC_INT_DISCONN_EVT */ {BTA_GATTC_CLOSE, BTA_GATTC_IDLE_ST},
262
263 };
264
265 /* type for state table */
266 typedef const uint8_t (*tBTA_GATTC_ST_TBL)[BTA_GATTC_NUM_COLS];
267
268 /* state table */
269 const tBTA_GATTC_ST_TBL bta_gattc_st_tbl[] = {
270 bta_gattc_st_idle, /* BTA_GATTC_IDLE_ST */
271 bta_gattc_st_w4_conn, /* BTA_GATTC_W4_CONN_ST */
272 bta_gattc_st_connected, /* BTA_GATTC_CONN_ST */
273 bta_gattc_st_discover /* BTA_GATTC_DISCOVER_ST */
274 };
275
276 /*****************************************************************************
277 * Global data
278 ****************************************************************************/
279
280 /* GATTC control block */
281 tBTA_GATTC_CB bta_gattc_cb;
282
283 #if (BTA_GATT_DEBUG == TRUE)
284 static const char* gattc_evt_code(tBTA_GATTC_INT_EVT evt_code);
285 static const char* gattc_state_code(tBTA_GATTC_STATE state_code);
286 #endif
287
288 /*******************************************************************************
289 *
290 * Function bta_gattc_sm_execute
291 *
292 * Description State machine event handling function for GATTC
293 *
294 *
295 * Returns bool : true if queued client request buffer can be
296 * immediately released, else false
297 *
298 ******************************************************************************/
bta_gattc_sm_execute(tBTA_GATTC_CLCB * p_clcb,uint16_t event,tBTA_GATTC_DATA * p_data)299 bool bta_gattc_sm_execute(tBTA_GATTC_CLCB* p_clcb, uint16_t event,
300 tBTA_GATTC_DATA* p_data) {
301 tBTA_GATTC_ST_TBL state_table;
302 uint8_t action;
303 int i;
304 bool rt = true;
305 tBTA_GATTC_STATE in_state = p_clcb->state;
306 uint16_t in_event = event;
307 #if (BTA_GATT_DEBUG == TRUE)
308 VLOG(1) << StringPrintf("%s: State 0x%02x [%s], Event 0x%x[%s]", __func__,
309 in_state, gattc_state_code(in_state), in_event,
310 gattc_evt_code(in_event));
311 #else
312 VLOG(1) << StringPrintf("%s: State 0x%02x, Event 0x%x", __func__, in_state,
313 in_event);
314 #endif
315
316 /* look up the state table for the current state */
317 state_table = bta_gattc_st_tbl[p_clcb->state];
318
319 event &= 0x00FF;
320
321 /* set next state */
322 p_clcb->state = state_table[event][BTA_GATTC_NEXT_STATE];
323
324 /* execute action functions */
325 for (i = 0; i < BTA_GATTC_ACTIONS; i++) {
326 action = state_table[event][i];
327 if (action != BTA_GATTC_IGNORE) {
328 (*bta_gattc_action[action])(p_clcb, p_data);
329 if (p_clcb->p_q_cmd == p_data) {
330 /* buffer is queued, don't free in the bta dispatcher.
331 * we free it ourselves when a completion event is received.
332 */
333 rt = false;
334 }
335 } else {
336 break;
337 }
338 }
339
340 #if (BTA_GATT_DEBUG == TRUE)
341 if (in_state != p_clcb->state) {
342 VLOG(1) << StringPrintf("GATTC State Change: [%s] -> [%s] after Event [%s]",
343 gattc_state_code(in_state),
344 gattc_state_code(p_clcb->state),
345 gattc_evt_code(in_event));
346 }
347 #else
348 VLOG(1) << StringPrintf(
349 "%s: GATTC State Change: 0x%02x -> 0x%02x after Event 0x%x", __func__,
350 in_state, p_clcb->state, in_event);
351 #endif
352 return rt;
353 }
354
355 /*******************************************************************************
356 *
357 * Function bta_gattc_hdl_event
358 *
359 * Description GATT client main event handling function.
360 *
361 *
362 * Returns bool
363 *
364 ******************************************************************************/
bta_gattc_hdl_event(BT_HDR * p_msg)365 bool bta_gattc_hdl_event(BT_HDR* p_msg) {
366 tBTA_GATTC_CLCB* p_clcb = NULL;
367 bool rt = true;
368 #if (BTA_GATT_DEBUG == TRUE)
369 VLOG(1) << __func__ << ": Event:" << gattc_evt_code(p_msg->event);
370 #endif
371 switch (p_msg->event) {
372
373 case BTA_GATTC_API_OPEN_EVT:
374 bta_gattc_process_api_open((tBTA_GATTC_DATA*)p_msg);
375 break;
376
377 case BTA_GATTC_API_CANCEL_OPEN_EVT:
378 bta_gattc_process_api_open_cancel((tBTA_GATTC_DATA*)p_msg);
379 break;
380
381 default:
382 if (p_msg->event == BTA_GATTC_INT_CONN_EVT)
383 p_clcb = bta_gattc_find_int_conn_clcb((tBTA_GATTC_DATA*)p_msg);
384 else if (p_msg->event == BTA_GATTC_INT_DISCONN_EVT)
385 p_clcb = bta_gattc_find_int_disconn_clcb((tBTA_GATTC_DATA*)p_msg);
386 else
387 p_clcb = bta_gattc_find_clcb_by_conn_id(p_msg->layer_specific);
388
389 if (p_clcb != NULL) {
390 rt =
391 bta_gattc_sm_execute(p_clcb, p_msg->event, (tBTA_GATTC_DATA*)p_msg);
392 } else {
393 VLOG(1) << "Ignore unknown conn ID: " << +p_msg->layer_specific;
394 }
395
396 break;
397 }
398
399 return rt;
400 }
401
402 /*****************************************************************************
403 * Debug Functions
404 ****************************************************************************/
405 #if (BTA_GATT_DEBUG == TRUE)
406
407 /*******************************************************************************
408 *
409 * Function gattc_evt_code
410 *
411 * Description
412 *
413 * Returns void
414 *
415 ******************************************************************************/
gattc_evt_code(tBTA_GATTC_INT_EVT evt_code)416 static const char* gattc_evt_code(tBTA_GATTC_INT_EVT evt_code) {
417 switch (evt_code) {
418 case BTA_GATTC_API_OPEN_EVT:
419 return "BTA_GATTC_API_OPEN_EVT";
420 case BTA_GATTC_INT_OPEN_FAIL_EVT:
421 return "BTA_GATTC_INT_OPEN_FAIL_EVT";
422 case BTA_GATTC_API_CANCEL_OPEN_EVT:
423 return "BTA_GATTC_API_CANCEL_OPEN_EVT";
424 case BTA_GATTC_INT_CANCEL_OPEN_OK_EVT:
425 return "BTA_GATTC_INT_CANCEL_OPEN_OK_EVT";
426 case BTA_GATTC_API_READ_EVT:
427 return "BTA_GATTC_API_READ_EVT";
428 case BTA_GATTC_API_WRITE_EVT:
429 return "BTA_GATTC_API_WRITE_EVT";
430 case BTA_GATTC_API_EXEC_EVT:
431 return "BTA_GATTC_API_EXEC_EVT";
432 case BTA_GATTC_API_CLOSE_EVT:
433 return "BTA_GATTC_API_CLOSE_EVT";
434 case BTA_GATTC_API_SEARCH_EVT:
435 return "BTA_GATTC_API_SEARCH_EVT";
436 case BTA_GATTC_API_CONFIRM_EVT:
437 return "BTA_GATTC_API_CONFIRM_EVT";
438 case BTA_GATTC_API_READ_MULTI_EVT:
439 return "BTA_GATTC_API_READ_MULTI_EVT";
440 case BTA_GATTC_INT_CONN_EVT:
441 return "BTA_GATTC_INT_CONN_EVT";
442 case BTA_GATTC_INT_DISCOVER_EVT:
443 return "BTA_GATTC_INT_DISCOVER_EVT";
444 case BTA_GATTC_DISCOVER_CMPL_EVT:
445 return "BTA_GATTC_DISCOVER_CMPL_EVT";
446 case BTA_GATTC_OP_CMPL_EVT:
447 return "BTA_GATTC_OP_CMPL_EVT";
448 case BTA_GATTC_INT_DISCONN_EVT:
449 return "BTA_GATTC_INT_DISCONN_EVT";
450 case BTA_GATTC_API_CFG_MTU_EVT:
451 return "BTA_GATTC_API_CFG_MTU_EVT";
452 default:
453 return "unknown GATTC event code";
454 }
455 }
456
457 /*******************************************************************************
458 *
459 * Function gattc_state_code
460 *
461 * Description
462 *
463 * Returns void
464 *
465 ******************************************************************************/
gattc_state_code(tBTA_GATTC_STATE state_code)466 static const char* gattc_state_code(tBTA_GATTC_STATE state_code) {
467 switch (state_code) {
468 case BTA_GATTC_IDLE_ST:
469 return "GATTC_IDLE_ST";
470 case BTA_GATTC_W4_CONN_ST:
471 return "GATTC_W4_CONN_ST";
472 case BTA_GATTC_CONN_ST:
473 return "GATTC_CONN_ST";
474 case BTA_GATTC_DISCOVER_ST:
475 return "GATTC_DISCOVER_ST";
476 default:
477 return "unknown GATTC state code";
478 }
479 }
480
481 #endif /* Debug Functions */
482