bta_ag_sdp.c revision 20524d393e8b3bea4c573f7980cd843500b0e6a4 
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 status);
49void bta_ag_sdp_cback_2(UINT16 status);
50void bta_ag_sdp_cback_3(UINT16 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 status, UINT8 idx)
72{
73    tBTA_AG_DISC_RESULT *p_buf;
74    UINT16              event;
75    tBTA_AG_SCB         *p_scb;
76
77    APPL_TRACE_DEBUG("bta_ag_sdp_cback status:0x%x", status);
78
79    if ((p_scb = bta_ag_scb_by_idx(idx)) != NULL)
80    {
81        /* set event according to int/acp */
82        if (p_scb->role == BTA_AG_ACP)
83        {
84            event = BTA_AG_DISC_ACP_RES_EVT;
85        }
86        else
87        {
88            event = BTA_AG_DISC_INT_RES_EVT;
89        }
90
91        if ((p_buf = (tBTA_AG_DISC_RESULT *) osi_getbuf(sizeof(tBTA_AG_DISC_RESULT))) != NULL)
92        {
93            p_buf->hdr.event = event;
94            p_buf->hdr.layer_specific = idx;
95            p_buf->status = status;
96            bta_sys_sendmsg(p_buf);
97        }
98    }
99}
100
101/*******************************************************************************
102**
103** Function         bta_ag_sdp_cback_1 to 3
104**
105** Description      SDP callback functions.  Since there is no way to
106**                  distinguish scb from the callback we need separate
107**                  callbacks for each scb.
108**
109**
110** Returns          void
111**
112*******************************************************************************/
113void bta_ag_sdp_cback_1(UINT16 status) {bta_ag_sdp_cback(status, 1);}
114void bta_ag_sdp_cback_2(UINT16 status) {bta_ag_sdp_cback(status, 2);}
115void bta_ag_sdp_cback_3(UINT16 status) {bta_ag_sdp_cback(status, 3);}
116
117/******************************************************************************
118**
119** Function         bta_ag_add_record
120**
121** Description      This function is called by a server application to add
122**                  HSP or HFP information to an SDP record.  Prior to
123**                  calling this function the application must call
124**                  SDP_CreateRecord() to create an SDP record.
125**
126** Returns          TRUE if function execution succeeded,
127**                  FALSE if function execution failed.
128**
129******************************************************************************/
130BOOLEAN bta_ag_add_record(UINT16 service_uuid, char *p_service_name, UINT8 scn,
131                          tBTA_AG_FEAT features, UINT32 sdp_handle)
132{
133    tSDP_PROTOCOL_ELEM  proto_elem_list[BTA_AG_NUM_PROTO_ELEMS];
134    UINT16              svc_class_id_list[BTA_AG_NUM_SVC_ELEMS];
135    UINT16              browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP};
136    UINT16              version;
137    UINT16              profile_uuid;
138    UINT8               network;
139    BOOLEAN             result = TRUE;
140    BOOLEAN             codec_supported = FALSE;
141    UINT8               buf[2];
142
143    APPL_TRACE_DEBUG("bta_ag_add_record uuid: %x", service_uuid);
144
145    memset( proto_elem_list, 0 , BTA_AG_NUM_PROTO_ELEMS*sizeof(tSDP_PROTOCOL_ELEM));
146
147    /* add the protocol element sequence */
148    proto_elem_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
149    proto_elem_list[0].num_params = 0;
150    proto_elem_list[1].protocol_uuid = UUID_PROTOCOL_RFCOMM;
151    proto_elem_list[1].num_params = 1;
152    proto_elem_list[1].params[0] = scn;
153    result &= SDP_AddProtocolList(sdp_handle, BTA_AG_NUM_PROTO_ELEMS, proto_elem_list);
154
155    /* add service class id list */
156    svc_class_id_list[0] = service_uuid;
157    svc_class_id_list[1] = UUID_SERVCLASS_GENERIC_AUDIO;
158    result &= SDP_AddServiceClassIdList(sdp_handle, BTA_AG_NUM_SVC_ELEMS, svc_class_id_list);
159
160    /* add profile descriptor list */
161    if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE)
162    {
163        profile_uuid = UUID_SERVCLASS_HF_HANDSFREE;
164        version = HFP_VERSION_1_6;
165    }
166    else
167    {
168        profile_uuid = UUID_SERVCLASS_HEADSET;
169        version = HSP_VERSION_1_2;
170    }
171    result &= SDP_AddProfileDescriptorList(sdp_handle, profile_uuid, version);
172
173    /* add service name */
174    if (p_service_name != NULL && p_service_name[0] != 0)
175    {
176        result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE,
177                    (UINT32)(strlen(p_service_name)+1), (UINT8 *) p_service_name);
178    }
179
180    /* add features and network */
181    if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE)
182    {
183        network = (features & BTA_AG_FEAT_REJECT) ? 1 : 0;
184        result &= SDP_AddAttribute(sdp_handle, ATTR_ID_DATA_STORES_OR_NETWORK,
185                    UINT_DESC_TYPE, 1, &network);
186
187        if (features & BTA_AG_FEAT_CODEC)
188            codec_supported = TRUE;
189
190        features &= BTA_AG_SDP_FEAT_SPEC;
191
192        /* Codec bit position is different in SDP and in BRSF */
193        if (codec_supported)
194            features |= 0x0020;
195
196        UINT16_TO_BE_FIELD(buf, features);
197        result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES, UINT_DESC_TYPE, 2, buf);
198    }
199
200    /* add browse group list */
201    result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, browse_list);
202
203    return result;
204}
205
206/*******************************************************************************
207**
208** Function         bta_ag_create_records
209**
210** Description      Create SDP records for registered services.
211**
212**
213** Returns          void
214**
215*******************************************************************************/
216void bta_ag_create_records(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
217{
218    int                 i;
219    tBTA_SERVICE_MASK   services;
220
221    services = p_scb->reg_services >> BTA_HSP_SERVICE_ID;
222    for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1)
223    {
224        /* if service is set in mask */
225        if (services & 1)
226        {
227            /* add sdp record if not already registered */
228            if (bta_ag_cb.profile[i].sdp_handle == 0)
229            {
230                bta_ag_cb.profile[i].sdp_handle = SDP_CreateRecord();
231                bta_ag_cb.profile[i].scn = BTM_AllocateSCN();
232                bta_ag_add_record(bta_ag_uuid[i], p_data->api_register.p_name[i],
233                    bta_ag_cb.profile[i].scn, p_data->api_register.features,
234                    bta_ag_cb.profile[i].sdp_handle);
235                bta_sys_add_uuid(bta_ag_uuid[i]);
236            }
237        }
238    }
239
240    p_scb->hsp_version = HSP_VERSION_1_2;
241
242}
243
244/*******************************************************************************
245**
246** Function         bta_ag_del_records
247**
248** Description      Delete SDP records for any registered services.
249**
250**
251** Returns          void
252**
253*******************************************************************************/
254void bta_ag_del_records(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
255{
256    tBTA_AG_SCB         *p = &bta_ag_cb.scb[0];
257    tBTA_SERVICE_MASK   services;
258    tBTA_SERVICE_MASK   others = 0;
259    int                 i;
260    UNUSED(p_data);
261
262    /* get services of all other registered servers */
263    for (i = 0; i < BTA_AG_NUM_IDX; i++, p++)
264    {
265        if (p_scb == p)
266        {
267            continue;
268        }
269
270        if (p->in_use && p->dealloc == FALSE)
271        {
272            others |= p->reg_services;
273        }
274    }
275
276    others >>= BTA_HSP_SERVICE_ID;
277    services = p_scb->reg_services >> BTA_HSP_SERVICE_ID;
278    for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1, others >>= 1)
279    {
280        /* if service registered for this scb and not registered for any other scb */
281        if (((services & 1) == 1) && ((others & 1) == 0))
282        {
283            APPL_TRACE_DEBUG("bta_ag_del_records %d", i);
284            if (bta_ag_cb.profile[i].sdp_handle != 0)
285            {
286                SDP_DeleteRecord(bta_ag_cb.profile[i].sdp_handle);
287                bta_ag_cb.profile[i].sdp_handle = 0;
288            }
289            BTM_FreeSCN(bta_ag_cb.profile[i].scn);
290            BTM_SecClrService(bta_ag_sec_id[i]);
291            bta_sys_remove_uuid(bta_ag_uuid[i]);
292        }
293    }
294}
295
296/*******************************************************************************
297**
298** Function         bta_ag_sdp_find_attr
299**
300** Description      Process SDP discovery results to find requested attributes
301**                  for requested service.
302**
303**
304** Returns          TRUE if results found, FALSE otherwise.
305**
306*******************************************************************************/
307BOOLEAN bta_ag_sdp_find_attr(tBTA_AG_SCB *p_scb, tBTA_SERVICE_MASK service)
308{
309    tSDP_DISC_REC       *p_rec = NULL;
310    tSDP_DISC_ATTR      *p_attr;
311    tSDP_PROTOCOL_ELEM  pe;
312    UINT16              uuid;
313    BOOLEAN             result = FALSE;
314
315    if (service & BTA_HFP_SERVICE_MASK)
316    {
317        uuid = UUID_SERVCLASS_HF_HANDSFREE;
318        p_scb->peer_version = HFP_VERSION_1_1;   /* Default version */
319    }
320    else if (service & BTA_HSP_SERVICE_MASK && p_scb->role == BTA_AG_INT)
321    {
322        uuid = UUID_SERVCLASS_HEADSET_HS;
323        p_scb->peer_version = 0x0100;   /* Default version */
324    }
325    else
326    {
327        return result;
328    }
329
330    /* loop through all records we found */
331    while (TRUE)
332    {
333        /* get next record; if none found, we're done */
334        if ((p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec)) == NULL)
335        {
336            if (uuid == UUID_SERVCLASS_HEADSET_HS)
337            {
338                /* Search again in case the peer device is HSP v1.0 */
339                uuid = UUID_SERVCLASS_HEADSET;
340                if ((p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec)) == NULL)
341                {
342                    break;
343                }
344            }
345            else
346                break;
347        }
348
349        /* get scn from proto desc list if initiator */
350        if (p_scb->role == BTA_AG_INT)
351        {
352            if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_RFCOMM, &pe))
353            {
354                p_scb->peer_scn = (UINT8) pe.params[0];
355            }
356            else
357            {
358                continue;
359            }
360        }
361
362        /* get profile version (if failure, version parameter is not updated) */
363        SDP_FindProfileVersionInRec(p_rec, uuid, &p_scb->peer_version);
364
365        /* get features if HFP */
366        if (service & BTA_HFP_SERVICE_MASK)
367        {
368            if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES)) != NULL)
369            {
370                /* Found attribute. Get value. */
371                /* There might be race condition between SDP and BRSF.  */
372                /* Do not update if we already received BRSF.           */
373                if (p_scb->peer_features == 0)
374                    p_scb->peer_features = p_attr->attr_value.v.u16;
375            }
376        }
377        else    /* HSP */
378        {
379            if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL)) != NULL)
380            {
381                /* Remote volume control of HSP */
382                if (p_attr->attr_value.v.u8)
383                    p_scb->peer_features |= BTA_AG_PEER_FEAT_VOL;
384                else
385                    p_scb->peer_features &= ~BTA_AG_PEER_FEAT_VOL;
386            }
387
388        }
389
390        /* found what we needed */
391        result = TRUE;
392        break;
393    }
394    return result;
395}
396
397/*******************************************************************************
398**
399** Function         bta_ag_do_disc
400**
401** Description      Do service discovery.
402**
403**
404** Returns          void
405**
406*******************************************************************************/
407void bta_ag_do_disc(tBTA_AG_SCB *p_scb, tBTA_SERVICE_MASK service)
408{
409    tSDP_UUID       uuid_list[2];
410    UINT16          num_uuid = 1;
411    UINT16          attr_list[4];
412    UINT8           num_attr;
413    BOOLEAN         db_inited = FALSE;
414
415    /* HFP initiator; get proto list and features */
416    if (service & BTA_HFP_SERVICE_MASK && p_scb->role == BTA_AG_INT)
417    {
418        attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
419        attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST;
420        attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST;
421        attr_list[3] = ATTR_ID_SUPPORTED_FEATURES;
422        num_attr = 4;
423        uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HF_HANDSFREE;
424    }
425    /* HFP acceptor; get features */
426    else if (service & BTA_HFP_SERVICE_MASK && p_scb->role == BTA_AG_ACP)
427    {
428        attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
429        attr_list[1] = ATTR_ID_BT_PROFILE_DESC_LIST;
430        attr_list[2] = ATTR_ID_SUPPORTED_FEATURES;
431        num_attr = 3;
432        uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HF_HANDSFREE;
433    }
434    /* HSP initiator; get proto list */
435    else if (service & BTA_HSP_SERVICE_MASK && p_scb->role == BTA_AG_INT)
436    {
437        attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
438        attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST;
439        attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST;
440        attr_list[3] = ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL;
441        num_attr = 4;
442
443        uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HEADSET;        /* Legacy from HSP v1.0 */
444        if (p_scb->hsp_version >= HSP_VERSION_1_2)
445        {
446            uuid_list[1].uu.uuid16 = UUID_SERVCLASS_HEADSET_HS;
447            num_uuid = 2;
448        }
449    }
450    /* HSP acceptor; no discovery */
451    else
452    {
453        return;
454    }
455
456    /* allocate buffer for sdp database */
457    p_scb->p_disc_db = (tSDP_DISCOVERY_DB *) osi_getbuf(BTA_AG_DISC_BUF_SIZE);
458
459    if(p_scb->p_disc_db)
460    {
461        /* set up service discovery database; attr happens to be attr_list len */
462        uuid_list[0].len = LEN_UUID_16;
463        uuid_list[1].len = LEN_UUID_16;
464        db_inited = SDP_InitDiscoveryDb(p_scb->p_disc_db, BTA_AG_DISC_BUF_SIZE, num_uuid,
465                            uuid_list, num_attr, attr_list);
466    }
467
468    if(db_inited)
469    {
470        /*Service discovery not initiated */
471        db_inited = SDP_ServiceSearchAttributeRequest(p_scb->peer_addr, p_scb->p_disc_db,
472                                      bta_ag_sdp_cback_tbl[bta_ag_scb_to_idx(p_scb) - 1]);
473    }
474
475    if(!db_inited)
476    {
477        /*free discover db */
478        bta_ag_free_db(p_scb, NULL);
479        /* sent failed event */
480        bta_ag_sm_execute(p_scb, BTA_AG_DISC_FAIL_EVT, NULL);
481    }
482
483}
484
485/*******************************************************************************
486**
487** Function         bta_ag_free_db
488**
489** Description      Free discovery database.
490**
491**
492** Returns          void
493**
494*******************************************************************************/
495void bta_ag_free_db(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
496{
497    UNUSED(p_data);
498    osi_freebuf_and_reset((void **)&p_scb->p_disc_db);
499}
500