1/******************************************************************************
2 *
3 *  Copyright (c) 2014 The Android Open Source Project
4 *  Copyright (C) 2009-2012 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 *  Filename:      btif_util.c
23 *
24 *  Description:   Miscellaneous helper functions
25 *
26 *
27 ***********************************************************************************/
28
29#include <hardware/bluetooth.h>
30#include <hardware/bt_hf.h>
31#include <hardware/bt_av.h>
32#include <netinet/in.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <string.h>
36#include <ctype.h>
37
38
39#define LOG_TAG "bt_btif_util"
40#include "btif_common.h"
41#include "bta_api.h"
42#include "gki.h"
43#include "btu.h"
44#include "bte.h"
45#include "btif_dm.h"
46#include "btif_util.h"
47#include "bta_ag_api.h"
48#include "bta_av_api.h"
49#include "bta_hh_api.h"
50#include "bta_hf_client_api.h"
51#include "avrc_defs.h"
52
53/************************************************************************************
54**  Constants & Macros
55************************************************************************************/
56#define ISDIGIT(a)  ((a>='0') && (a<='9'))
57#define ISXDIGIT(a) (((a>='0') && (a<='9'))||((a>='A') && (a<='F'))||((a>='a') && (a<='f')))
58
59/************************************************************************************
60**  Local type definitions
61************************************************************************************/
62
63/************************************************************************************
64**  Static variables
65************************************************************************************/
66
67/************************************************************************************
68**  Static functions
69************************************************************************************/
70
71/************************************************************************************
72**  Externs
73************************************************************************************/
74
75/************************************************************************************
76**  Functions
77************************************************************************************/
78
79/*****************************************************************************
80**   Logging helper functions
81*****************************************************************************/
82
83UINT32 devclass2uint(DEV_CLASS dev_class)
84{
85    UINT32 cod = 0;
86
87    if(dev_class != NULL)
88    {
89        /* if COD is 0, irrespective of the device type set it to Unclassified device */
90        cod = (dev_class[2]) | (dev_class[1] << 8) | (dev_class[0] << 16);
91    }
92    return cod;
93}
94void uint2devclass(UINT32 cod, DEV_CLASS dev_class)
95{
96    dev_class[2] = (UINT8)cod;
97    dev_class[1] = (UINT8)(cod >> 8);
98    dev_class[0] = (UINT8)(cod >> 16);
99}
100
101static const UINT8  sdp_base_uuid[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00,
102                                       0x80, 0x00, 0x00, 0x80, 0x5F, 0x9B, 0x34, 0xFB};
103
104void uuid16_to_uuid128(uint16_t uuid16, bt_uuid_t* uuid128)
105{
106    uint16_t uuid16_bo;
107    memset(uuid128, 0, sizeof(bt_uuid_t));
108
109    memcpy(uuid128->uu, sdp_base_uuid, MAX_UUID_SIZE);
110    uuid16_bo = ntohs(uuid16);
111    memcpy(uuid128->uu + 2, &uuid16_bo, sizeof(uint16_t));
112}
113
114void string_to_uuid(char *str, bt_uuid_t *p_uuid)
115{
116    uint32_t uuid0, uuid4;
117    uint16_t uuid1, uuid2, uuid3, uuid5;
118
119    sscanf(str, "%08x-%04hx-%04hx-%04hx-%08x%04hx",
120                &uuid0, &uuid1, &uuid2, &uuid3, &uuid4, &uuid5);
121
122    uuid0 = htonl(uuid0);
123    uuid1 = htons(uuid1);
124    uuid2 = htons(uuid2);
125    uuid3 = htons(uuid3);
126    uuid4 = htonl(uuid4);
127    uuid5 = htons(uuid5);
128
129    memcpy(&(p_uuid->uu[0]), &uuid0, 4);
130    memcpy(&(p_uuid->uu[4]), &uuid1, 2);
131    memcpy(&(p_uuid->uu[6]), &uuid2, 2);
132    memcpy(&(p_uuid->uu[8]), &uuid3, 2);
133    memcpy(&(p_uuid->uu[10]), &uuid4, 4);
134    memcpy(&(p_uuid->uu[14]), &uuid5, 2);
135
136    return;
137
138}
139
140void uuid_to_string_legacy(bt_uuid_t *p_uuid, char *str)
141{
142    uint32_t uuid0, uuid4;
143    uint16_t uuid1, uuid2, uuid3, uuid5;
144
145    memcpy(&uuid0, &(p_uuid->uu[0]), 4);
146    memcpy(&uuid1, &(p_uuid->uu[4]), 2);
147    memcpy(&uuid2, &(p_uuid->uu[6]), 2);
148    memcpy(&uuid3, &(p_uuid->uu[8]), 2);
149    memcpy(&uuid4, &(p_uuid->uu[10]), 4);
150    memcpy(&uuid5, &(p_uuid->uu[14]), 2);
151
152    sprintf((char *)str, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x",
153            ntohl(uuid0), ntohs(uuid1),
154            ntohs(uuid2), ntohs(uuid3),
155            ntohl(uuid4), ntohs(uuid5));
156    return;
157}
158
159/*****************************************************************************
160**  Function        ascii_2_hex
161**
162**  Description     This function converts an ASCII string into HEX
163**
164**  Returns         the number of hex bytes filled.
165*/
166int ascii_2_hex (char *p_ascii, int len, UINT8 *p_hex)
167{
168    int     x;
169    UINT8   c;
170
171    for (x = 0; (x < len) && (*p_ascii); x++)
172    {
173        if (ISDIGIT (*p_ascii))
174            c = (*p_ascii - '0') << 4;
175        else
176            c = (toupper(*p_ascii) - 'A' + 10) << 4;
177
178        p_ascii++;
179        if (*p_ascii)
180        {
181            if (ISDIGIT (*p_ascii))
182                c |= (*p_ascii - '0');
183            else
184                c |= (toupper(*p_ascii) - 'A' + 10);
185
186            p_ascii++;
187        }
188        *p_hex++ = c;
189    }
190
191    return (x);
192}
193
194
195const char* dump_dm_search_event(UINT16 event)
196{
197    switch(event)
198    {
199        CASE_RETURN_STR(BTA_DM_INQ_RES_EVT)
200        CASE_RETURN_STR(BTA_DM_INQ_CMPL_EVT)
201        CASE_RETURN_STR(BTA_DM_DISC_RES_EVT)
202        CASE_RETURN_STR(BTA_DM_DISC_BLE_RES_EVT)
203        CASE_RETURN_STR(BTA_DM_DISC_CMPL_EVT)
204        CASE_RETURN_STR(BTA_DM_DI_DISC_CMPL_EVT)
205        CASE_RETURN_STR(BTA_DM_SEARCH_CANCEL_CMPL_EVT)
206
207        default:
208            return "UNKNOWN MSG ID";
209     }
210}
211
212
213const char* dump_property_type(bt_property_type_t type)
214{
215    switch(type)
216    {
217        CASE_RETURN_STR(BT_PROPERTY_BDNAME)
218        CASE_RETURN_STR(BT_PROPERTY_BDADDR)
219        CASE_RETURN_STR(BT_PROPERTY_UUIDS)
220        CASE_RETURN_STR(BT_PROPERTY_CLASS_OF_DEVICE)
221        CASE_RETURN_STR(BT_PROPERTY_TYPE_OF_DEVICE)
222        CASE_RETURN_STR(BT_PROPERTY_REMOTE_RSSI)
223        CASE_RETURN_STR(BT_PROPERTY_ADAPTER_DISCOVERY_TIMEOUT)
224        CASE_RETURN_STR(BT_PROPERTY_ADAPTER_BONDED_DEVICES)
225        CASE_RETURN_STR(BT_PROPERTY_ADAPTER_SCAN_MODE)
226        CASE_RETURN_STR(BT_PROPERTY_REMOTE_FRIENDLY_NAME)
227
228        default:
229            return "UNKNOWN PROPERTY ID";
230    }
231}
232
233const char* dump_dm_event(UINT16 event)
234{
235    switch(event)
236    {
237        CASE_RETURN_STR(BTA_DM_ENABLE_EVT)
238        CASE_RETURN_STR(BTA_DM_DISABLE_EVT)
239        CASE_RETURN_STR(BTA_DM_PIN_REQ_EVT)
240        CASE_RETURN_STR(BTA_DM_AUTH_CMPL_EVT)
241        CASE_RETURN_STR(BTA_DM_AUTHORIZE_EVT)
242        CASE_RETURN_STR(BTA_DM_LINK_UP_EVT)
243        CASE_RETURN_STR(BTA_DM_LINK_DOWN_EVT)
244        CASE_RETURN_STR(BTA_DM_SIG_STRENGTH_EVT)
245        CASE_RETURN_STR(BTA_DM_BUSY_LEVEL_EVT)
246        CASE_RETURN_STR(BTA_DM_BOND_CANCEL_CMPL_EVT)
247        CASE_RETURN_STR(BTA_DM_SP_CFM_REQ_EVT)
248        CASE_RETURN_STR(BTA_DM_SP_KEY_NOTIF_EVT)
249        CASE_RETURN_STR(BTA_DM_SP_RMT_OOB_EVT)
250        CASE_RETURN_STR(BTA_DM_SP_KEYPRESS_EVT)
251        CASE_RETURN_STR(BTA_DM_ROLE_CHG_EVT)
252        CASE_RETURN_STR(BTA_DM_BLE_KEY_EVT)
253        CASE_RETURN_STR(BTA_DM_BLE_SEC_REQ_EVT)
254        CASE_RETURN_STR(BTA_DM_BLE_PASSKEY_NOTIF_EVT)
255        CASE_RETURN_STR(BTA_DM_BLE_PASSKEY_REQ_EVT)
256        CASE_RETURN_STR(BTA_DM_BLE_OOB_REQ_EVT)
257        CASE_RETURN_STR(BTA_DM_BLE_LOCAL_IR_EVT)
258        CASE_RETURN_STR(BTA_DM_BLE_LOCAL_ER_EVT)
259        CASE_RETURN_STR(BTA_DM_BLE_AUTH_CMPL_EVT)
260        CASE_RETURN_STR(BTA_DM_DEV_UNPAIRED_EVT)
261        CASE_RETURN_STR(BTA_DM_HW_ERROR_EVT)
262        CASE_RETURN_STR(BTA_DM_ENER_INFO_READ)
263
264        default:
265            return "UNKNOWN DM EVENT";
266    }
267}
268
269const char* dump_hf_event(UINT16 event)
270{
271    switch(event)
272    {
273        CASE_RETURN_STR(BTA_AG_ENABLE_EVT)
274        CASE_RETURN_STR(BTA_AG_REGISTER_EVT)
275        CASE_RETURN_STR(BTA_AG_OPEN_EVT)
276        CASE_RETURN_STR(BTA_AG_CLOSE_EVT)
277        CASE_RETURN_STR(BTA_AG_CONN_EVT)
278        CASE_RETURN_STR(BTA_AG_AUDIO_OPEN_EVT)
279        CASE_RETURN_STR(BTA_AG_AUDIO_CLOSE_EVT)
280        CASE_RETURN_STR(BTA_AG_SPK_EVT)
281        CASE_RETURN_STR(BTA_AG_MIC_EVT)
282        CASE_RETURN_STR(BTA_AG_AT_CKPD_EVT)
283        CASE_RETURN_STR(BTA_AG_DISABLE_EVT)
284#if (BTM_WBS_INCLUDED == TRUE )
285        CASE_RETURN_STR(BTA_AG_WBS_EVT)
286#endif
287        CASE_RETURN_STR(BTA_AG_AT_A_EVT)
288        CASE_RETURN_STR(BTA_AG_AT_D_EVT)
289        CASE_RETURN_STR(BTA_AG_AT_CHLD_EVT)
290        CASE_RETURN_STR(BTA_AG_AT_CHUP_EVT)
291        CASE_RETURN_STR(BTA_AG_AT_CIND_EVT)
292        CASE_RETURN_STR(BTA_AG_AT_VTS_EVT)
293        CASE_RETURN_STR(BTA_AG_AT_BINP_EVT)
294        CASE_RETURN_STR(BTA_AG_AT_BLDN_EVT)
295        CASE_RETURN_STR(BTA_AG_AT_BVRA_EVT)
296        CASE_RETURN_STR(BTA_AG_AT_NREC_EVT)
297        CASE_RETURN_STR(BTA_AG_AT_CNUM_EVT)
298        CASE_RETURN_STR(BTA_AG_AT_BTRH_EVT)
299        CASE_RETURN_STR(BTA_AG_AT_CLCC_EVT)
300        CASE_RETURN_STR(BTA_AG_AT_COPS_EVT)
301        CASE_RETURN_STR(BTA_AG_AT_UNAT_EVT)
302        CASE_RETURN_STR(BTA_AG_AT_CBC_EVT)
303        CASE_RETURN_STR(BTA_AG_AT_BAC_EVT)
304        CASE_RETURN_STR(BTA_AG_AT_BCS_EVT)
305
306        default:
307            return "UNKNOWN MSG ID";
308     }
309}
310
311const char* dump_hf_client_event(UINT16 event)
312{
313    switch(event)
314    {
315        CASE_RETURN_STR(BTA_HF_CLIENT_ENABLE_EVT)
316        CASE_RETURN_STR(BTA_HF_CLIENT_REGISTER_EVT)
317        CASE_RETURN_STR(BTA_HF_CLIENT_OPEN_EVT)
318        CASE_RETURN_STR(BTA_HF_CLIENT_CLOSE_EVT)
319        CASE_RETURN_STR(BTA_HF_CLIENT_CONN_EVT)
320        CASE_RETURN_STR(BTA_HF_CLIENT_AUDIO_OPEN_EVT)
321        CASE_RETURN_STR(BTA_HF_CLIENT_AUDIO_MSBC_OPEN_EVT)
322        CASE_RETURN_STR(BTA_HF_CLIENT_AUDIO_CLOSE_EVT)
323        CASE_RETURN_STR(BTA_HF_CLIENT_SPK_EVT)
324        CASE_RETURN_STR(BTA_HF_CLIENT_MIC_EVT)
325        CASE_RETURN_STR(BTA_HF_CLIENT_DISABLE_EVT)
326        CASE_RETURN_STR(BTA_HF_CLIENT_IND_EVT)
327        CASE_RETURN_STR(BTA_HF_CLIENT_VOICE_REC_EVT)
328        CASE_RETURN_STR(BTA_HF_CLIENT_OPERATOR_NAME_EVT)
329        CASE_RETURN_STR(BTA_HF_CLIENT_CLIP_EVT)
330        CASE_RETURN_STR(BTA_HF_CLIENT_CCWA_EVT)
331        CASE_RETURN_STR(BTA_HF_CLIENT_AT_RESULT_EVT)
332        CASE_RETURN_STR(BTA_HF_CLIENT_CLCC_EVT)
333        CASE_RETURN_STR(BTA_HF_CLIENT_CNUM_EVT)
334        CASE_RETURN_STR(BTA_HF_CLIENT_BTRH_EVT)
335        CASE_RETURN_STR(BTA_HF_CLIENT_BSIR_EVT)
336        CASE_RETURN_STR(BTA_HF_CLIENT_BINP_EVT)
337        CASE_RETURN_STR(BTA_HF_CLIENT_RING_INDICATION)
338        default:
339            return "UNKNOWN MSG ID";
340     }
341}
342
343const char* dump_hh_event(UINT16 event)
344{
345    switch(event)
346    {
347        CASE_RETURN_STR(BTA_HH_ENABLE_EVT)
348        CASE_RETURN_STR(BTA_HH_DISABLE_EVT)
349        CASE_RETURN_STR(BTA_HH_OPEN_EVT)
350        CASE_RETURN_STR(BTA_HH_CLOSE_EVT)
351        CASE_RETURN_STR(BTA_HH_GET_DSCP_EVT)
352        CASE_RETURN_STR(BTA_HH_GET_PROTO_EVT)
353        CASE_RETURN_STR(BTA_HH_GET_RPT_EVT)
354        CASE_RETURN_STR(BTA_HH_GET_IDLE_EVT)
355        CASE_RETURN_STR(BTA_HH_SET_PROTO_EVT)
356        CASE_RETURN_STR(BTA_HH_SET_RPT_EVT)
357        CASE_RETURN_STR(BTA_HH_SET_IDLE_EVT)
358        CASE_RETURN_STR(BTA_HH_VC_UNPLUG_EVT)
359        CASE_RETURN_STR(BTA_HH_ADD_DEV_EVT)
360        CASE_RETURN_STR(BTA_HH_RMV_DEV_EVT)
361        CASE_RETURN_STR(BTA_HH_API_ERR_EVT)
362        default:
363            return "UNKNOWN MSG ID";
364     }
365}
366
367
368const char* dump_hf_conn_state(UINT16 event)
369{
370    switch(event)
371    {
372        CASE_RETURN_STR(BTHF_CONNECTION_STATE_DISCONNECTED)
373        CASE_RETURN_STR(BTHF_CONNECTION_STATE_CONNECTING)
374        CASE_RETURN_STR(BTHF_CONNECTION_STATE_CONNECTED)
375        CASE_RETURN_STR(BTHF_CONNECTION_STATE_SLC_CONNECTED)
376        CASE_RETURN_STR(BTHF_CONNECTION_STATE_DISCONNECTING)
377        default:
378            return "UNKNOWN MSG ID";
379    }
380}
381
382const char* dump_hf_call_state(bthf_call_state_t call_state)
383{
384    switch(call_state)
385    {
386        CASE_RETURN_STR(BTHF_CALL_STATE_IDLE)
387        CASE_RETURN_STR(BTHF_CALL_STATE_HELD)
388        CASE_RETURN_STR(BTHF_CALL_STATE_DIALING)
389        CASE_RETURN_STR(BTHF_CALL_STATE_ALERTING)
390        CASE_RETURN_STR(BTHF_CALL_STATE_INCOMING)
391        CASE_RETURN_STR(BTHF_CALL_STATE_WAITING)
392        CASE_RETURN_STR(BTHF_CALL_STATE_ACTIVE)
393        default:
394            return "UNKNOWN CALL STATE";
395    }
396}
397
398const char* dump_thread_evt(bt_cb_thread_evt evt)
399{
400    switch(evt)
401    {
402        CASE_RETURN_STR(ASSOCIATE_JVM)
403        CASE_RETURN_STR(DISASSOCIATE_JVM)
404
405        default:
406            return "unknown thread evt";
407    }
408}
409
410
411const char* dump_hf_audio_state(UINT16 event)
412{
413    switch(event)
414    {
415        CASE_RETURN_STR(BTHF_AUDIO_STATE_DISCONNECTED)
416        CASE_RETURN_STR(BTHF_AUDIO_STATE_CONNECTING)
417        CASE_RETURN_STR(BTHF_AUDIO_STATE_CONNECTED)
418        CASE_RETURN_STR(BTHF_AUDIO_STATE_DISCONNECTING)
419        default:
420           return "UNKNOWN MSG ID";
421
422    }
423}
424
425const char* dump_av_conn_state(UINT16 event)
426{
427    switch(event)
428    {
429        CASE_RETURN_STR(BTAV_CONNECTION_STATE_DISCONNECTED)
430        CASE_RETURN_STR(BTAV_CONNECTION_STATE_CONNECTING)
431        CASE_RETURN_STR(BTAV_CONNECTION_STATE_CONNECTED)
432        CASE_RETURN_STR(BTAV_CONNECTION_STATE_DISCONNECTING)
433        default:
434            return "UNKNOWN MSG ID";
435    }
436}
437
438const char* dump_av_audio_state(UINT16 event)
439{
440    switch(event)
441    {
442        CASE_RETURN_STR(BTAV_AUDIO_STATE_REMOTE_SUSPEND)
443        CASE_RETURN_STR(BTAV_AUDIO_STATE_STOPPED)
444        CASE_RETURN_STR(BTAV_AUDIO_STATE_STARTED)
445        default:
446            return "UNKNOWN MSG ID";
447    }
448}
449
450const char* dump_adapter_scan_mode(bt_scan_mode_t mode)
451{
452    switch(mode)
453    {
454        CASE_RETURN_STR(BT_SCAN_MODE_NONE)
455        CASE_RETURN_STR(BT_SCAN_MODE_CONNECTABLE)
456        CASE_RETURN_STR(BT_SCAN_MODE_CONNECTABLE_DISCOVERABLE)
457
458        default:
459            return "unknown scan mode";
460    }
461}
462
463const char* dump_bt_status(bt_status_t status)
464{
465    switch(status)
466    {
467        CASE_RETURN_STR(BT_STATUS_SUCCESS)
468        CASE_RETURN_STR(BT_STATUS_FAIL)
469        CASE_RETURN_STR(BT_STATUS_NOT_READY)
470        CASE_RETURN_STR(BT_STATUS_NOMEM)
471        CASE_RETURN_STR(BT_STATUS_BUSY)
472        CASE_RETURN_STR(BT_STATUS_UNSUPPORTED)
473
474        default:
475            return "unknown scan mode";
476    }
477}
478
479const char *dump_rc_event(UINT8 event)
480{
481   switch(event) {
482        CASE_RETURN_STR(BTA_AV_RC_OPEN_EVT)
483        CASE_RETURN_STR(BTA_AV_RC_CLOSE_EVT)
484        CASE_RETURN_STR(BTA_AV_REMOTE_CMD_EVT)
485        CASE_RETURN_STR(BTA_AV_REMOTE_RSP_EVT)
486        CASE_RETURN_STR(BTA_AV_VENDOR_CMD_EVT)
487        CASE_RETURN_STR(BTA_AV_VENDOR_RSP_EVT)
488        CASE_RETURN_STR(BTA_AV_META_MSG_EVT)
489        CASE_RETURN_STR(BTA_AV_RC_FEAT_EVT)
490        default:
491            return "UNKNOWN_EVENT";
492   }
493}
494
495const char * dump_rc_notification_event_id(UINT8 event_id)
496{
497    switch(event_id)
498    {
499        CASE_RETURN_STR(AVRC_EVT_PLAY_STATUS_CHANGE)
500        CASE_RETURN_STR(AVRC_EVT_TRACK_CHANGE)
501        CASE_RETURN_STR(AVRC_EVT_TRACK_REACHED_END)
502        CASE_RETURN_STR(AVRC_EVT_TRACK_REACHED_START)
503        CASE_RETURN_STR(AVRC_EVT_PLAY_POS_CHANGED)
504        CASE_RETURN_STR(AVRC_EVT_BATTERY_STATUS_CHANGE)
505        CASE_RETURN_STR(AVRC_EVT_SYSTEM_STATUS_CHANGE)
506        CASE_RETURN_STR(AVRC_EVT_APP_SETTING_CHANGE)
507        CASE_RETURN_STR(AVRC_EVT_VOLUME_CHANGE)
508
509        default:
510            return "Unhandled Event ID";
511    }
512}
513
514const char*  dump_rc_pdu(UINT8 pdu)
515{
516    switch(pdu)
517    {
518        CASE_RETURN_STR(AVRC_PDU_LIST_PLAYER_APP_ATTR)
519        CASE_RETURN_STR(AVRC_PDU_LIST_PLAYER_APP_VALUES)
520        CASE_RETURN_STR(AVRC_PDU_GET_CUR_PLAYER_APP_VALUE)
521        CASE_RETURN_STR(AVRC_PDU_SET_PLAYER_APP_VALUE)
522        CASE_RETURN_STR(AVRC_PDU_GET_PLAYER_APP_ATTR_TEXT)
523        CASE_RETURN_STR(AVRC_PDU_GET_PLAYER_APP_VALUE_TEXT)
524        CASE_RETURN_STR(AVRC_PDU_INFORM_DISPLAY_CHARSET)
525        CASE_RETURN_STR(AVRC_PDU_INFORM_BATTERY_STAT_OF_CT)
526        CASE_RETURN_STR(AVRC_PDU_GET_ELEMENT_ATTR)
527        CASE_RETURN_STR(AVRC_PDU_GET_PLAY_STATUS)
528        CASE_RETURN_STR(AVRC_PDU_REGISTER_NOTIFICATION)
529        CASE_RETURN_STR(AVRC_PDU_REQUEST_CONTINUATION_RSP)
530        CASE_RETURN_STR(AVRC_PDU_ABORT_CONTINUATION_RSP)
531        CASE_RETURN_STR(AVRC_PDU_SET_ABSOLUTE_VOLUME)
532        default:
533            return "Unknown PDU";
534    }
535}
536