bta_ag_sdp.cc revision d35a648d39710bbc5ac59f8add85166455af5af7 
1/******************************************************************************
2 *
3 *  Copyright (C) 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 audio gateway functions performing SDP
22 *  operations.
23 *
24 ******************************************************************************/
25
26#include <string.h>
27#include "bta_api.h"
28#include "bta_sys.h"
29#include "bta_ag_api.h"
30#include "bta_ag_int.h"
31#include "sdp_api.h"
32#include "btm_api.h"
33#include "bt_common.h"
34#include "utl.h"
35
36/* Number of protocol elements in protocol element list. */
37#define BTA_AG_NUM_PROTO_ELEMS      2
38
39/* Number of elements in service class id list. */
40#define BTA_AG_NUM_SVC_ELEMS        2
41
42/* size of database for service discovery */
43#ifndef BTA_AG_DISC_BUF_SIZE
44#define BTA_AG_DISC_BUF_SIZE        BT_DEFAULT_BUFFER_SIZE
45#endif
46
47/* declare sdp callback functions */
48void bta_ag_sdp_cback_1(uint16_t status);
49void bta_ag_sdp_cback_2(uint16_t status);
50void bta_ag_sdp_cback_3(uint16_t status);
51
52/* SDP callback function table */
53typedef tSDP_DISC_CMPL_CB *tBTA_AG_SDP_CBACK;
54const tBTA_AG_SDP_CBACK bta_ag_sdp_cback_tbl[] =
55{
56    bta_ag_sdp_cback_1,
57    bta_ag_sdp_cback_2,
58    bta_ag_sdp_cback_3
59};
60
61/*******************************************************************************
62**
63** Function         bta_ag_sdp_cback
64**
65** Description      SDP callback function.
66**
67**
68** Returns          void
69**
70*******************************************************************************/
71static void bta_ag_sdp_cback(uint16_t status, uint8_t idx)
72{
73    uint16_t             event;
74    tBTA_AG_SCB         *p_scb;
75
76    APPL_TRACE_DEBUG("%s status:0x%x", __func__, status);
77
78    if ((p_scb = bta_ag_scb_by_idx(idx)) != NULL)
79    {
80        /* set event according to int/acp */
81        if (p_scb->role == BTA_AG_ACP)
82        {
83            event = BTA_AG_DISC_ACP_RES_EVT;
84        }
85        else
86        {
87            event = BTA_AG_DISC_INT_RES_EVT;
88        }
89
90        tBTA_AG_DISC_RESULT *p_buf =
91            (tBTA_AG_DISC_RESULT *)osi_malloc(sizeof(tBTA_AG_DISC_RESULT));
92        p_buf->hdr.event = event;
93        p_buf->hdr.layer_specific = idx;
94        p_buf->status = status;
95        bta_sys_sendmsg(p_buf);
96    }
97}
98
99/*******************************************************************************
100**
101** Function         bta_ag_sdp_cback_1 to 3
102**
103** Description      SDP callback functions.  Since there is no way to
104**                  distinguish scb from the callback we need separate
105**                  callbacks for each scb.
106**
107**
108** Returns          void
109**
110*******************************************************************************/
111void bta_ag_sdp_cback_1(uint16_t status) {bta_ag_sdp_cback(status, 1);}
112void bta_ag_sdp_cback_2(uint16_t status) {bta_ag_sdp_cback(status, 2);}
113void bta_ag_sdp_cback_3(uint16_t status) {bta_ag_sdp_cback(status, 3);}
114
115/******************************************************************************
116**
117** Function         bta_ag_add_record
118**
119** Description      This function is called by a server application to add
120**                  HSP or HFP information to an SDP record.  Prior to
121**                  calling this function the application must call
122**                  SDP_CreateRecord() to create an SDP record.
123**
124** Returns          true if function execution succeeded,
125**                  false if function execution failed.
126**
127******************************************************************************/
128bool bta_ag_add_record(uint16_t service_uuid, char *p_service_name, uint8_t scn,
129                          tBTA_AG_FEAT features, uint32_t sdp_handle)
130{
131    tSDP_PROTOCOL_ELEM  proto_elem_list[BTA_AG_NUM_PROTO_ELEMS];
132    uint16_t            svc_class_id_list[BTA_AG_NUM_SVC_ELEMS];
133    uint16_t            browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP};
134    uint16_t            version;
135    uint16_t            profile_uuid;
136    uint8_t             network;
137    bool                result = true;
138    bool                codec_supported = false;
139    uint8_t             buf[2];
140
141    APPL_TRACE_DEBUG("%s uuid: %x", __func__, service_uuid);
142
143    memset( proto_elem_list, 0 , BTA_AG_NUM_PROTO_ELEMS*sizeof(tSDP_PROTOCOL_ELEM));
144
145    /* add the protocol element sequence */
146    proto_elem_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
147    proto_elem_list[0].num_params = 0;
148    proto_elem_list[1].protocol_uuid = UUID_PROTOCOL_RFCOMM;
149    proto_elem_list[1].num_params = 1;
150    proto_elem_list[1].params[0] = scn;
151    result &= SDP_AddProtocolList(sdp_handle, BTA_AG_NUM_PROTO_ELEMS, proto_elem_list);
152
153    /* add service class id list */
154    svc_class_id_list[0] = service_uuid;
155    svc_class_id_list[1] = UUID_SERVCLASS_GENERIC_AUDIO;
156    result &= SDP_AddServiceClassIdList(sdp_handle, BTA_AG_NUM_SVC_ELEMS, svc_class_id_list);
157
158    /* add profile descriptor list */
159    if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE)
160    {
161        profile_uuid = UUID_SERVCLASS_HF_HANDSFREE;
162        version = BTA_HFP_VERSION;
163    }
164    else
165    {
166        profile_uuid = UUID_SERVCLASS_HEADSET;
167        version = HSP_VERSION_1_2;
168    }
169    result &= SDP_AddProfileDescriptorList(sdp_handle, profile_uuid, version);
170
171    /* add service name */
172    if (p_service_name != NULL && p_service_name[0] != 0)
173    {
174        result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE,
175                    (uint32_t)(strlen(p_service_name)+1), (uint8_t *) p_service_name);
176    }
177
178    /* add features and network */
179    if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE)
180    {
181        network = (features & BTA_AG_FEAT_REJECT) ? 1 : 0;
182        result &= SDP_AddAttribute(sdp_handle, ATTR_ID_DATA_STORES_OR_NETWORK,
183                    UINT_DESC_TYPE, 1, &network);
184
185        if (features & BTA_AG_FEAT_CODEC)
186            codec_supported = true;
187
188        features &= BTA_AG_SDP_FEAT_SPEC;
189
190        /* Codec bit position is different in SDP and in BRSF */
191        if (codec_supported)
192            features |= 0x0020;
193
194        UINT16_TO_BE_FIELD(buf, features);
195        result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES, UINT_DESC_TYPE, 2, buf);
196    }
197
198    /* add browse group list */
199    result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, browse_list);
200
201    return result;
202}
203
204/*******************************************************************************
205**
206** Function         bta_ag_create_records
207**
208** Description      Create SDP records for registered services.
209**
210**
211** Returns          void
212**
213*******************************************************************************/
214void bta_ag_create_records(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
215{
216    int                 i;
217    tBTA_SERVICE_MASK   services;
218
219    services = p_scb->reg_services >> BTA_HSP_SERVICE_ID;
220    for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1)
221    {
222        /* if service is set in mask */
223        if (services & 1)
224        {
225            /* add sdp record if not already registered */
226            if (bta_ag_cb.profile[i].sdp_handle == 0)
227            {
228                bta_ag_cb.profile[i].sdp_handle = SDP_CreateRecord();
229                bta_ag_cb.profile[i].scn = BTM_AllocateSCN();
230                bta_ag_add_record(bta_ag_uuid[i], p_data->api_register.p_name[i],
231                    bta_ag_cb.profile[i].scn, p_data->api_register.features,
232                    bta_ag_cb.profile[i].sdp_handle);
233                bta_sys_add_uuid(bta_ag_uuid[i]);
234            }
235        }
236    }
237
238    p_scb->hsp_version = HSP_VERSION_1_2;
239
240}
241
242/*******************************************************************************
243**
244** Function         bta_ag_del_records
245**
246** Description      Delete SDP records for any registered services.
247**
248**
249** Returns          void
250**
251*******************************************************************************/
252void bta_ag_del_records(tBTA_AG_SCB *p_scb,
253                        UNUSED_ATTR tBTA_AG_DATA *p_data)
254{
255    tBTA_AG_SCB         *p = &bta_ag_cb.scb[0];
256    tBTA_SERVICE_MASK   services;
257    tBTA_SERVICE_MASK   others = 0;
258    int                 i;
259
260    /* get services of all other registered servers */
261    for (i = 0; i < BTA_AG_NUM_IDX; i++, p++)
262    {
263        if (p_scb == p)
264        {
265            continue;
266        }
267
268        if (p->in_use && p->dealloc == false)
269        {
270            others |= p->reg_services;
271        }
272    }
273
274    others >>= BTA_HSP_SERVICE_ID;
275    services = p_scb->reg_services >> BTA_HSP_SERVICE_ID;
276    for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1, others >>= 1)
277    {
278        /* if service registered for this scb and not registered for any other scb */
279        if (((services & 1) == 1) && ((others & 1) == 0))
280        {
281            APPL_TRACE_DEBUG("bta_ag_del_records %d", i);
282            if (bta_ag_cb.profile[i].sdp_handle != 0)
283            {
284                SDP_DeleteRecord(bta_ag_cb.profile[i].sdp_handle);
285                bta_ag_cb.profile[i].sdp_handle = 0;
286            }
287            BTM_FreeSCN(bta_ag_cb.profile[i].scn);
288            BTM_SecClrService(bta_ag_sec_id[i]);
289            bta_sys_remove_uuid(bta_ag_uuid[i]);
290        }
291    }
292}
293
294/*******************************************************************************
295**
296** Function         bta_ag_sdp_find_attr
297**
298** Description      Process SDP discovery results to find requested attributes
299**                  for requested service.
300**
301**
302** Returns          true if results found, false otherwise.
303**
304*******************************************************************************/
305bool bta_ag_sdp_find_attr(tBTA_AG_SCB *p_scb, tBTA_SERVICE_MASK service)
306{
307    tSDP_DISC_REC       *p_rec = NULL;
308    tSDP_DISC_ATTR      *p_attr;
309    tSDP_PROTOCOL_ELEM  pe;
310    uint16_t              uuid;
311    bool             result = false;
312
313    if (service & BTA_HFP_SERVICE_MASK)
314    {
315        uuid = UUID_SERVCLASS_HF_HANDSFREE;
316        p_scb->peer_version = HFP_VERSION_1_1;   /* Default version */
317    }
318    else if (service & BTA_HSP_SERVICE_MASK && p_scb->role == BTA_AG_INT)
319    {
320        uuid = UUID_SERVCLASS_HEADSET_HS;
321        p_scb->peer_version = 0x0100;   /* Default version */
322    }
323    else
324    {
325        return result;
326    }
327
328    /* loop through all records we found */
329    while (true)
330    {
331        /* get next record; if none found, we're done */
332        if ((p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec)) == NULL)
333        {
334            if (uuid == UUID_SERVCLASS_HEADSET_HS)
335            {
336                /* Search again in case the peer device is HSP v1.0 */
337                uuid = UUID_SERVCLASS_HEADSET;
338                if ((p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec)) == NULL)
339                {
340                    break;
341                }
342            }
343            else
344                break;
345        }
346
347        /* get scn from proto desc list if initiator */
348        if (p_scb->role == BTA_AG_INT)
349        {
350            if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_RFCOMM, &pe))
351            {
352                p_scb->peer_scn = (uint8_t) pe.params[0];
353            }
354            else
355            {
356                continue;
357            }
358        }
359
360        /* get profile version (if failure, version parameter is not updated) */
361        SDP_FindProfileVersionInRec(p_rec, uuid, &p_scb->peer_version);
362
363        /* get features if HFP */
364        if (service & BTA_HFP_SERVICE_MASK)
365        {
366            if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES)) != NULL)
367            {
368                /* Found attribute. Get value. */
369                /* There might be race condition between SDP and BRSF.  */
370                /* Do not update if we already received BRSF.           */
371                if (p_scb->peer_features == 0)
372                    p_scb->peer_features = p_attr->attr_value.v.u16;
373            }
374        }
375        else    /* HSP */
376        {
377            if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL)) != NULL)
378            {
379                /* Remote volume control of HSP */
380                if (p_attr->attr_value.v.u8)
381                    p_scb->peer_features |= BTA_AG_PEER_FEAT_VOL;
382                else
383                    p_scb->peer_features &= ~BTA_AG_PEER_FEAT_VOL;
384            }
385
386        }
387
388        /* found what we needed */
389        result = true;
390        break;
391    }
392    return result;
393}
394
395/*******************************************************************************
396**
397** Function         bta_ag_do_disc
398**
399** Description      Do service discovery.
400**
401**
402** Returns          void
403**
404*******************************************************************************/
405void bta_ag_do_disc(tBTA_AG_SCB *p_scb, tBTA_SERVICE_MASK service)
406{
407    tSDP_UUID       uuid_list[2];
408    uint16_t          num_uuid = 1;
409    uint16_t          attr_list[4];
410    uint8_t           num_attr;
411    bool         db_inited = false;
412
413    /* HFP initiator; get proto list and features */
414    if (service & BTA_HFP_SERVICE_MASK && p_scb->role == BTA_AG_INT)
415    {
416        attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
417        attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST;
418        attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST;
419        attr_list[3] = ATTR_ID_SUPPORTED_FEATURES;
420        num_attr = 4;
421        uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HF_HANDSFREE;
422    }
423    /* HFP acceptor; get features */
424    else if (service & BTA_HFP_SERVICE_MASK && p_scb->role == BTA_AG_ACP)
425    {
426        attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
427        attr_list[1] = ATTR_ID_BT_PROFILE_DESC_LIST;
428        attr_list[2] = ATTR_ID_SUPPORTED_FEATURES;
429        num_attr = 3;
430        uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HF_HANDSFREE;
431    }
432    /* HSP initiator; get proto list */
433    else if (service & BTA_HSP_SERVICE_MASK && p_scb->role == BTA_AG_INT)
434    {
435        attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
436        attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST;
437        attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST;
438        attr_list[3] = ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL;
439        num_attr = 4;
440
441        uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HEADSET;        /* Legacy from HSP v1.0 */
442        if (p_scb->hsp_version >= HSP_VERSION_1_2)
443        {
444            uuid_list[1].uu.uuid16 = UUID_SERVCLASS_HEADSET_HS;
445            num_uuid = 2;
446        }
447    }
448    /* HSP acceptor; no discovery */
449    else
450    {
451        return;
452    }
453
454    /* allocate buffer for sdp database */
455    p_scb->p_disc_db = (tSDP_DISCOVERY_DB *)osi_malloc(BTA_AG_DISC_BUF_SIZE);
456    /* set up service discovery database; attr happens to be attr_list len */
457    uuid_list[0].len = LEN_UUID_16;
458    uuid_list[1].len = LEN_UUID_16;
459    db_inited = SDP_InitDiscoveryDb(p_scb->p_disc_db, BTA_AG_DISC_BUF_SIZE,
460                                    num_uuid, uuid_list, num_attr, attr_list);
461
462    if(db_inited)
463    {
464        /*Service discovery not initiated */
465        db_inited = SDP_ServiceSearchAttributeRequest(p_scb->peer_addr, p_scb->p_disc_db,
466                                      bta_ag_sdp_cback_tbl[bta_ag_scb_to_idx(p_scb) - 1]);
467    }
468
469    if(!db_inited)
470    {
471        /*free discover db */
472        bta_ag_free_db(p_scb, NULL);
473        /* sent failed event */
474        bta_ag_sm_execute(p_scb, BTA_AG_DISC_FAIL_EVT, NULL);
475    }
476
477}
478
479/*******************************************************************************
480**
481** Function         bta_ag_free_db
482**
483** Description      Free discovery database.
484**
485**
486** Returns          void
487**
488*******************************************************************************/
489void bta_ag_free_db(tBTA_AG_SCB *p_scb,
490                    UNUSED_ATTR tBTA_AG_DATA *p_data)
491{
492    osi_free_and_reset((void **)&p_scb->p_disc_db);
493}
494