bta/pan/bta_pan_act.c

   1 /******************************************************************************
   2  *
   3  *  Copyright (C) 2004-2012 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 pan action functions for the state machine.
  22  *
  23  ******************************************************************************/
  24
  25 #include "bt_target.h"
  26
  27 #if defined(PAN_INCLUDED) && (PAN_INCLUDED == TRUE)
  28
  29 #include "bta_api.h"
  30 #include "bta_sys.h"
  31 #include "bt_common.h"
  32 #include "pan_api.h"
  33 #include "bta_pan_api.h"
  34 #include "bta_pan_int.h"
  35 #include "bta_pan_co.h"
  36 #include <string.h>
  37 #include "utl.h"
  38
  39
  40 /* RX and TX data flow mask */
  41 #define BTA_PAN_RX_MASK              0x0F
  42 #define BTA_PAN_TX_MASK              0xF0
  43
  44 /*******************************************************************************
  45  **
  46  ** Function    bta_pan_pm_conn_busy
  47  **
  48  ** Description set pan pm connection busy state
  49  **
  50  ** Params      p_scb: state machine control block of pan connection
  51  **
  52  ** Returns     void
  53  **
  54  *******************************************************************************/
  55 static void bta_pan_pm_conn_busy(tBTA_PAN_SCB *p_scb)
  56 {
  57     if ((p_scb != NULL) && (p_scb->state != BTA_PAN_IDLE_ST))
  58         bta_sys_busy(BTA_ID_PAN, p_scb->app_id, p_scb->bd_addr);
  59 }
  60
  61 /*******************************************************************************
  62  **
  63  ** Function    bta_pan_pm_conn_idle
  64  **
  65  ** Description set pan pm connection idle state
  66  **
  67  ** Params      p_scb: state machine control block of pan connection
  68  **
  69  ** Returns     void
  70  **
  71  *******************************************************************************/
  72 static void bta_pan_pm_conn_idle(tBTA_PAN_SCB *p_scb)
  73 {
  74     if ((p_scb != NULL) && (p_scb->state != BTA_PAN_IDLE_ST))
  75         bta_sys_idle(BTA_ID_PAN, p_scb->app_id, p_scb->bd_addr);
  76 }
  77
  78 /*******************************************************************************
  79 **
  80 ** Function         bta_pan_conn_state_cback
  81 **
  82 ** Description      Connection state callback from Pan profile
  83 **
  84 **
  85 ** Returns          void
  86 **
  87 *******************************************************************************/
  88 static void bta_pan_conn_state_cback(UINT16 handle, BD_ADDR bd_addr, tPAN_RESULT state,
  89                                      BOOLEAN is_role_change, UINT8 src_role, UINT8 dst_role)
  90 {
  91     tBTA_PAN_SCB *p_scb;
  92     tBTA_PAN_CONN *p_buf = (tBTA_PAN_CONN *)osi_malloc(sizeof(tBTA_PAN_CONN));
  93
  94     if ((state == PAN_SUCCESS) && !is_role_change) {
  95         p_buf->hdr.event = BTA_PAN_CONN_OPEN_EVT;
  96         if ((p_scb = bta_pan_scb_by_handle(handle)) == NULL) {
  97             /* allocate an scb */
  98             p_scb = bta_pan_scb_alloc();
  99         }
 100         /* we have exceeded maximum number of connections */
 101         if (!p_scb) {
 102             PAN_Disconnect (handle);
 103             return;
 104         }
 105
 106         p_scb->handle = handle;
 107         p_scb->local_role = src_role;
 108         p_scb->peer_role = dst_role;
 109         p_scb->pan_flow_enable = TRUE;
 110         bdcpy(p_scb->bd_addr, bd_addr);
 111         p_scb->data_queue = fixed_queue_new(SIZE_MAX);
 112
 113         if (src_role == PAN_ROLE_CLIENT)
 114             p_scb->app_id = bta_pan_cb.app_id[0];
 115         else if (src_role == PAN_ROLE_GN_SERVER)
 116             p_scb->app_id = bta_pan_cb.app_id[1];
 117         else if (src_role == PAN_ROLE_NAP_SERVER)
 118             p_scb->app_id = bta_pan_cb.app_id[2];
 119     }
 120     else if ((state != PAN_SUCCESS) && !is_role_change) {
 121         p_buf->hdr.event = BTA_PAN_CONN_CLOSE_EVT;
 122     } else {
 123         return;
 124     }
 125
 126     p_buf->result = state;
 127     p_buf->hdr.layer_specific = handle;
 128
 129     bta_sys_sendmsg(p_buf);
 130 }
 131
 132 /*******************************************************************************
 133 **
 134 ** Function         bta_pan_data_flow_cb
 135 **
 136 ** Description      Data flow status callback from PAN
 137 **
 138 **
 139 ** Returns          void
 140 **
 141 *******************************************************************************/
 142 static void bta_pan_data_flow_cb(UINT16 handle, tPAN_RESULT result)
 143 {
 144     tBTA_PAN_SCB *p_scb;
 145
 146     if ((p_scb = bta_pan_scb_by_handle(handle)) == NULL)
 147         return;
 148
 149     if (result == PAN_TX_FLOW_ON) {
 150         BT_HDR *p_buf = (BT_HDR *) osi_malloc(sizeof(BT_HDR));
 151         p_buf->layer_specific = handle;
 152         p_buf->event = BTA_PAN_BNEP_FLOW_ENABLE_EVT;
 153         bta_sys_sendmsg(p_buf);
 154         bta_pan_co_rx_flow(handle, p_scb->app_id, TRUE);
 155     } else if (result == PAN_TX_FLOW_OFF) {
 156         p_scb->pan_flow_enable = FALSE;
 157         bta_pan_co_rx_flow(handle, p_scb->app_id, FALSE);
 158     }
 159 }
 160
 161 /*******************************************************************************
 162 **
 163 ** Function         bta_pan_data_buf_ind_cback
 164 **
 165 ** Description      data indication callback from pan profile
 166 **
 167 **
 168 ** Returns          void
 169 **
 170 *******************************************************************************/
 171 static void bta_pan_data_buf_ind_cback(UINT16 handle, BD_ADDR src, BD_ADDR dst, UINT16 protocol, BT_HDR *p_buf,
 172                                    BOOLEAN ext, BOOLEAN forward)
 173 {
 174     tBTA_PAN_SCB *p_scb;
 175     BT_HDR *p_new_buf;
 176
 177     if (sizeof(tBTA_PAN_DATA_PARAMS) > p_buf->offset) {
 178         /* offset smaller than data structure in front of actual data */
 179         p_new_buf = (BT_HDR *)osi_malloc(PAN_BUF_SIZE);
 180         memcpy((UINT8 *)(p_new_buf + 1) + sizeof(tBTA_PAN_DATA_PARAMS),
 181                (UINT8 *)(p_buf + 1) + p_buf->offset, p_buf->len);
 182         p_new_buf->len    = p_buf->len;
 183         p_new_buf->offset = sizeof(tBTA_PAN_DATA_PARAMS);
 184         osi_free(p_buf);
 185     } else {
 186         p_new_buf = p_buf;
 187     }
 188     /* copy params into the space before the data */
 189     bdcpy(((tBTA_PAN_DATA_PARAMS *)p_new_buf)->src, src);
 190     bdcpy(((tBTA_PAN_DATA_PARAMS *)p_new_buf)->dst, dst);
 191     ((tBTA_PAN_DATA_PARAMS *)p_new_buf)->protocol = protocol;
 192     ((tBTA_PAN_DATA_PARAMS *)p_new_buf)->ext = ext;
 193     ((tBTA_PAN_DATA_PARAMS *)p_new_buf)->forward = forward;
 194
 195     if ((p_scb = bta_pan_scb_by_handle(handle)) == NULL) {
 196         osi_free(p_new_buf);
 197         return;
 198     }
 199
 200     fixed_queue_enqueue(p_scb->data_queue, p_new_buf);
 201     BT_HDR *p_event = (BT_HDR *)osi_malloc(sizeof(BT_HDR));
 202     p_event->layer_specific = handle;
 203     p_event->event = BTA_PAN_RX_FROM_BNEP_READY_EVT;
 204     bta_sys_sendmsg(p_event);
 205 }
 206
 207 /*******************************************************************************
 208 **
 209 ** Function         bta_pan_pfilt_ind_cback
 210 **
 211 ** Description
 212 **
 213 **
 214 ** Returns          void
 215 **
 216 *******************************************************************************/
 217 static void bta_pan_pfilt_ind_cback(UINT16 handle, BOOLEAN indication,tBNEP_RESULT result,
 218                                     UINT16 num_filters, UINT8 *p_filters)
 219 {
 220
 221     bta_pan_co_pfilt_ind(handle, indication, (tBTA_PAN_STATUS)((result == BNEP_SUCCESS) ? BTA_PAN_SUCCESS : BTA_PAN_FAIL),
 222                                     num_filters, p_filters);
 223
 224
 225 }
 226
 227
 228 /*******************************************************************************
 229 **
 230 ** Function         bta_pan_mfilt_ind_cback
 231 **
 232 ** Description
 233 **
 234 **
 235 ** Returns          void
 236 **
 237 *******************************************************************************/
 238 static void bta_pan_mfilt_ind_cback(UINT16 handle, BOOLEAN indication,tBNEP_RESULT result,
 239                                     UINT16 num_mfilters, UINT8 *p_mfilters)
 240 {
 241
 242     bta_pan_co_mfilt_ind(handle, indication, (tBTA_PAN_STATUS)((result == BNEP_SUCCESS) ? BTA_PAN_SUCCESS : BTA_PAN_FAIL),
 243                                     num_mfilters, p_mfilters);
 244 }
 245
 246
 247
 248 /*******************************************************************************
 249 **
 250 ** Function         bta_pan_has_multiple_connections
 251 **
 252 ** Description      Check whether there are multiple GN/NAP connections to
 253 **                  different devices
 254 **
 255 **
 256 ** Returns          BOOLEAN
 257 **
 258 *******************************************************************************/
 259 static BOOLEAN bta_pan_has_multiple_connections(UINT8 app_id)
 260 {
 261     tBTA_PAN_SCB *p_scb = NULL;
 262     BOOLEAN     found = FALSE;
 263     BD_ADDR     bd_addr;
 264
 265     for (UINT8 index = 0; index < BTA_PAN_NUM_CONN; index++)
 266     {
 267         p_scb = &bta_pan_cb.scb[index];
 268         if (p_scb->in_use == TRUE && app_id == p_scb->app_id)
 269         {
 270             /* save temp bd_addr */
 271             bdcpy(bd_addr, p_scb->bd_addr);
 272             found = TRUE;
 273             break;
 274         }
 275     }
 276
 277     /* If cannot find a match then there is no connection at all */
 278     if (found == FALSE)
 279         return FALSE;
 280
 281     /* Find whether there is another connection with different device other than PANU.
 282         Could be same service or different service */
 283     for (UINT8 index = 0; index < BTA_PAN_NUM_CONN; index++)
 284     {
 285         p_scb = &bta_pan_cb.scb[index];
 286         if (p_scb->in_use == TRUE && p_scb->app_id != bta_pan_cb.app_id[0] &&
 287                 bdcmp(bd_addr, p_scb->bd_addr))
 288         {
 289             return TRUE;
 290         }
 291     }
 292     return FALSE;
 293 }
 294
 295 /*******************************************************************************
 296 **
 297 ** Function         bta_pan_enable
 298 **
 299 ** Description
 300 **
 301 **
 302 **
 303 ** Returns          void
 304 **
 305 *******************************************************************************/
 306 void bta_pan_enable(tBTA_PAN_DATA *p_data)
 307 {
 308     tPAN_REGISTER reg_data;
 309     UINT16  initial_discoverability;
 310     UINT16  initial_connectability;
 311     UINT16  d_window;
 312     UINT16  d_interval;
 313     UINT16  c_window;
 314     UINT16  c_interval;
 315
 316     bta_pan_cb.p_cback = p_data->api_enable.p_cback;
 317
 318     reg_data.pan_conn_state_cb  = bta_pan_conn_state_cback;
 319     reg_data.pan_bridge_req_cb  = NULL;
 320     reg_data.pan_data_buf_ind_cb = bta_pan_data_buf_ind_cback;
 321     reg_data.pan_data_ind_cb = NULL;
 322     reg_data.pan_pfilt_ind_cb = bta_pan_pfilt_ind_cback;
 323     reg_data.pan_mfilt_ind_cb = bta_pan_mfilt_ind_cback;
 324     reg_data.pan_tx_data_flow_cb = bta_pan_data_flow_cb;
 325
 326     /* read connectability and discoverability settings.
 327     Pan profile changes the settings. We have to change it back to
 328     be consistent with other bta subsystems */
 329     initial_connectability = BTM_ReadConnectability(&c_window, &c_interval);
 330     initial_discoverability = BTM_ReadDiscoverability(&d_window, &d_interval);
 331
 332
 333     PAN_Register (&reg_data);
 334
 335
 336     /* set it back to original value */
 337     BTM_SetDiscoverability(initial_discoverability, d_window, d_interval);
 338     BTM_SetConnectability(initial_connectability, c_window, c_interval);
 339
 340     bta_pan_cb.flow_mask = bta_pan_co_init(&bta_pan_cb.q_level);
 341     bta_pan_cb.p_cback(BTA_PAN_ENABLE_EVT, NULL);
 342
 343 }
 344
 345 /*******************************************************************************
 346 **
 347 ** Function         bta_pan_set_role
 348 **
 349 ** Description
 350 **
 351 ** Returns          void
 352 **
 353 *******************************************************************************/
 354 void bta_pan_set_role(tBTA_PAN_DATA *p_data)
 355 {
 356     tPAN_RESULT status;
 357     tBTA_PAN_SET_ROLE set_role;
 358     UINT8  sec[3];
 359
 360
 361     bta_pan_cb.app_id[0] = p_data->api_set_role.user_app_id;
 362     bta_pan_cb.app_id[1] = p_data->api_set_role.gn_app_id;
 363     bta_pan_cb.app_id[2] = p_data->api_set_role.nap_app_id;
 364
 365     sec[0] = p_data->api_set_role.user_sec_mask;
 366     sec[1] = p_data->api_set_role.gn_sec_mask;
 367     sec[2] = p_data->api_set_role.nap_sec_mask;
 368
 369     /* set security correctly in api and here */
 370     status = PAN_SetRole(p_data->api_set_role.role, sec,
 371                                      p_data->api_set_role.user_name,
 372                                      p_data->api_set_role.gn_name,
 373                                      p_data->api_set_role.nap_name);
 374
 375     set_role.role = p_data->api_set_role.role;
 376     if(status == PAN_SUCCESS)
 377     {
 378         if(p_data->api_set_role.role & PAN_ROLE_NAP_SERVER )
 379             bta_sys_add_uuid(UUID_SERVCLASS_NAP);
 380         else
 381             bta_sys_remove_uuid(UUID_SERVCLASS_NAP);
 382
 383         if(p_data->api_set_role.role & PAN_ROLE_GN_SERVER )
 384             bta_sys_add_uuid(UUID_SERVCLASS_GN);
 385         else
 386             bta_sys_remove_uuid(UUID_SERVCLASS_GN);
 387
 388         if(p_data->api_set_role.role & PAN_ROLE_CLIENT )
 389             bta_sys_add_uuid(UUID_SERVCLASS_PANU);
 390         else
 391             bta_sys_remove_uuid(UUID_SERVCLASS_PANU);
 392
 393         set_role.status = BTA_PAN_SUCCESS;
 394     }
 395     /* if status is not success clear everything */
 396     else
 397     {
 398         PAN_SetRole(0, 0, NULL, NULL, NULL);
 399         bta_sys_remove_uuid(UUID_SERVCLASS_NAP);
 400         bta_sys_remove_uuid(UUID_SERVCLASS_GN);
 401         bta_sys_remove_uuid(UUID_SERVCLASS_PANU);
 402         set_role.status = BTA_PAN_FAIL;
 403     }
 404     bta_pan_cb.p_cback(BTA_PAN_SET_ROLE_EVT, (tBTA_PAN *)&set_role);
 405 }
 406
 407
 408
 409 /*******************************************************************************
 410 **
 411 ** Function         bta_pan_disable
 412 **
 413 ** Description
 414 **
 415 **
 416 **
 417 ** Returns          void
 418 **
 419 *******************************************************************************/
 420 void bta_pan_disable(void)
 421 {
 422
 423     BT_HDR *p_buf;
 424     tBTA_PAN_SCB *p_scb = &bta_pan_cb.scb[0];
 425     UINT8 i;
 426
 427
 428     /* close all connections */
 429     PAN_SetRole (0, NULL, NULL, NULL, NULL);
 430
 431 #if (BTA_EIR_CANNED_UUID_LIST != TRUE)
 432     bta_sys_remove_uuid(UUID_SERVCLASS_NAP);
 433     bta_sys_remove_uuid(UUID_SERVCLASS_GN);
 434     bta_sys_remove_uuid(UUID_SERVCLASS_PANU);
 435 #endif // BTA_EIR_CANNED_UUID_LIST
 436     /* free all queued up data buffers */
 437     for (i = 0; i < BTA_PAN_NUM_CONN; i++, p_scb++)
 438     {
 439         if (p_scb->in_use)
 440         {
 441             while ((p_buf = (BT_HDR *)fixed_queue_try_dequeue(p_scb->data_queue)) != NULL)
 442                 osi_free(p_buf);
 443
 444             bta_pan_co_close(p_scb->handle, p_scb->app_id);
 445
 446         }
 447     }
 448
 449
 450
 451     PAN_Deregister();
 452
 453 }
 454
 455 /*******************************************************************************
 456 **
 457 ** Function         bta_pan_open
 458 **
 459 ** Description
 460 **
 461 ** Returns          void
 462 **
 463 *******************************************************************************/
 464 void bta_pan_open(tBTA_PAN_SCB *p_scb, tBTA_PAN_DATA *p_data)
 465 {
 466     tPAN_RESULT status;
 467     tBTA_PAN_OPEN data;
 468     tBTA_PAN_OPENING    opening;
 469
 470
 471     status = PAN_Connect (p_data->api_open.bd_addr, p_data->api_open.local_role, p_data->api_open.peer_role,
 472                         &p_scb->handle);
 473     APPL_TRACE_DEBUG("%s pan connect status: %d", __func__, status);
 474
 475     if(status == PAN_SUCCESS)
 476     {
 477
 478         bdcpy(p_scb->bd_addr, p_data->api_open.bd_addr);
 479         p_scb->local_role = p_data->api_open.local_role;
 480         p_scb->peer_role = p_data->api_open.peer_role;
 481         bdcpy(opening.bd_addr, p_data->api_open.bd_addr);
 482         opening.handle = p_scb->handle;
 483         bta_pan_cb.p_cback(BTA_PAN_OPENING_EVT, (tBTA_PAN *)&opening);
 484
 485
 486     }
 487     else
 488     {
 489         bta_pan_scb_dealloc(p_scb);
 490         bdcpy(data.bd_addr, p_data->api_open.bd_addr);
 491         data.status = BTA_PAN_FAIL;
 492         data.local_role = p_data->api_open.local_role;
 493         data.peer_role = p_data->api_open.peer_role;
 494         bta_pan_cb.p_cback(BTA_PAN_OPEN_EVT, (tBTA_PAN *)&data);
 495     }
 496
 497 }
 498
 499
 500 /*******************************************************************************
 501 **
 502 ** Function         bta_pan_close
 503 **
 504 ** Description
 505 **
 506 **
 507 **
 508 ** Returns          void
 509 **
 510 *******************************************************************************/
 511 void bta_pan_api_close (tBTA_PAN_SCB *p_scb, tBTA_PAN_DATA *p_data)
 512 {
 513     tBTA_PAN_CONN *p_buf = (tBTA_PAN_CONN *)osi_malloc(sizeof(tBTA_PAN_CONN));
 514
 515     UNUSED(p_data);
 516
 517     PAN_Disconnect(p_scb->handle);
 518
 519     /*
 520      * Send an event to BTA so that application will get the connection
 521      * close event.
 522      */
 523     p_buf->hdr.event = BTA_PAN_CONN_CLOSE_EVT;
 524     p_buf->hdr.layer_specific = p_scb->handle;
 525
 526     bta_sys_sendmsg(p_buf);
 527 }
 528
 529 /*******************************************************************************
 530 **
 531 ** Function         bta_pan_conn_open
 532 **
 533 ** Description      process connection open event
 534 **
 535 ** Returns          void
 536 **
 537 *******************************************************************************/
 538 void bta_pan_conn_open(tBTA_PAN_SCB *p_scb, tBTA_PAN_DATA *p_data)
 539 {
 540
 541     tBTA_PAN_OPEN data;
 542
 543     APPL_TRACE_DEBUG("%s pan connection result: %d", __func__, p_data->conn.result);
 544
 545     bdcpy(data.bd_addr, p_scb->bd_addr);
 546     data.handle = p_scb->handle;
 547     data.local_role = p_scb->local_role;
 548     data.peer_role = p_scb->peer_role;
 549
 550     if(p_data->conn.result == PAN_SUCCESS)
 551     {
 552         data.status = BTA_PAN_SUCCESS;
 553         p_scb->pan_flow_enable = TRUE;
 554         p_scb->app_flow_enable = TRUE;
 555         bta_sys_conn_open(BTA_ID_PAN ,p_scb->app_id, p_scb->bd_addr);
 556     }
 557     else
 558     {
 559         bta_pan_scb_dealloc(p_scb);
 560         data.status = BTA_PAN_FAIL;
 561     }
 562
 563     p_scb->pan_flow_enable = TRUE;
 564     p_scb->app_flow_enable = TRUE;
 565
 566     /* If app_id is NAP/GN, check whether there are multiple connections.
 567        If there are, provide a special app_id to dm to enforce master role only. */
 568     if ((p_scb->app_id == bta_pan_cb.app_id[1] || p_scb->app_id == bta_pan_cb.app_id[2]) &&
 569             bta_pan_has_multiple_connections(p_scb->app_id))
 570     {
 571         p_scb->app_id = BTA_APP_ID_PAN_MULTI;
 572     }
 573
 574     bta_sys_conn_open(BTA_ID_PAN, p_scb->app_id, p_scb->bd_addr);
 575     bta_pan_cb.p_cback(BTA_PAN_OPEN_EVT, (tBTA_PAN *)&data);
 576
 577
 578 }
 579
 580 /*******************************************************************************
 581 **
 582 ** Function         bta_pan_conn_close
 583 **
 584 ** Description      process connection close event
 585 **
 586 **
 587 **
 588 ** Returns          void
 589 **
 590 *******************************************************************************/
 591 void bta_pan_conn_close(tBTA_PAN_SCB *p_scb, tBTA_PAN_DATA *p_data)
 592 {
 593
 594     tBTA_PAN_CLOSE data;
 595     BT_HDR *p_buf;
 596
 597     data.handle = p_data->hdr.layer_specific;
 598
 599     bta_sys_conn_close( BTA_ID_PAN ,p_scb->app_id, p_scb->bd_addr);
 600
 601     /* free all queued up data buffers */
 602     while ((p_buf = (BT_HDR *)fixed_queue_try_dequeue(p_scb->data_queue)) != NULL)
 603         osi_free(p_buf);
 604
 605     bta_pan_scb_dealloc(p_scb);
 606
 607     bta_pan_cb.p_cback(BTA_PAN_CLOSE_EVT, (tBTA_PAN *)&data);
 608
 609 }
 610
 611
 612
 613
 614 /*******************************************************************************
 615 **
 616 ** Function         bta_pan_rx_path
 617 **
 618 ** Description      Handle data on the RX path (data sent from the phone to
 619 **                  BTA).
 620 **
 621 **
 622 ** Returns          void
 623 **
 624 *******************************************************************************/
 625 void bta_pan_rx_path(tBTA_PAN_SCB *p_scb, tBTA_PAN_DATA *p_data)
 626 {
 627     UNUSED(p_data);
 628
 629     /* if data path configured for rx pull */
 630     if ((bta_pan_cb.flow_mask & BTA_PAN_RX_MASK) == BTA_PAN_RX_PULL)
 631     {
 632         /* if we can accept data */
 633         if (p_scb->pan_flow_enable == TRUE)
 634         {
 635             /* call application callout function for rx path */
 636             bta_pan_co_rx_path(p_scb->handle, p_scb->app_id);
 637         }
 638     }
 639     /* else data path configured for rx push */
 640     else
 641     {
 642
 643     }
 644 }
 645
 646 /*******************************************************************************
 647 **
 648 ** Function         bta_pan_tx_path
 649 **
 650 ** Description      Handle the TX data path (data sent from BTA to the phone).
 651 **
 652 **
 653 ** Returns          void
 654 **
 655 *******************************************************************************/
 656 void bta_pan_tx_path(tBTA_PAN_SCB *p_scb, tBTA_PAN_DATA *p_data)
 657 {
 658     UNUSED(p_data);
 659
 660     /* if data path configured for tx pull */
 661     if ((bta_pan_cb.flow_mask & BTA_PAN_TX_MASK) == BTA_PAN_TX_PULL)
 662     {
 663         bta_pan_pm_conn_busy(p_scb);
 664         /* call application callout function for tx path */
 665         bta_pan_co_tx_path(p_scb->handle, p_scb->app_id);
 666
 667         /* free data that exceeds queue level */
 668         while (fixed_queue_length(p_scb->data_queue) > bta_pan_cb.q_level)
 669             osi_free(fixed_queue_try_dequeue(p_scb->data_queue));
 670         bta_pan_pm_conn_idle(p_scb);
 671     }
 672     /* if configured for zero copy push */
 673     else if ((bta_pan_cb.flow_mask & BTA_PAN_TX_MASK) == BTA_PAN_TX_PUSH_BUF)
 674     {
 675         /* if app can accept data */
 676         if (p_scb->app_flow_enable == TRUE)
 677         {
 678             BT_HDR *p_buf;
 679
 680             /* read data from the queue */
 681             if ((p_buf = (BT_HDR *)fixed_queue_try_dequeue(p_scb->data_queue)) != NULL)
 682             {
 683                 /* send data to application */
 684                 bta_pan_co_tx_writebuf(p_scb->handle,
 685                                         p_scb->app_id,
 686                                         ((tBTA_PAN_DATA_PARAMS *)p_buf)->src,
 687                                         ((tBTA_PAN_DATA_PARAMS *)p_buf)->dst,
 688                                         ((tBTA_PAN_DATA_PARAMS *)p_buf)->protocol,
 689                                         p_buf,
 690                                         ((tBTA_PAN_DATA_PARAMS *)p_buf)->ext,
 691                                         ((tBTA_PAN_DATA_PARAMS *)p_buf)->forward);
 692
 693             }
 694             /* free data that exceeds queue level  */
 695             while (fixed_queue_length(p_scb->data_queue) > bta_pan_cb.q_level)
 696                 osi_free(fixed_queue_try_dequeue(p_scb->data_queue));
 697
 698             /* if there is more data to be passed to
 699             upper layer */
 700             if (!fixed_queue_is_empty(p_scb->data_queue))
 701             {
 702                 p_buf = (BT_HDR *)osi_malloc(sizeof(BT_HDR));
 703                 p_buf->layer_specific = p_scb->handle;
 704                 p_buf->event = BTA_PAN_RX_FROM_BNEP_READY_EVT;
 705                 bta_sys_sendmsg(p_buf);
 706             }
 707         }
 708     }
 709 }
 710
 711 /*******************************************************************************
 712 **
 713 ** Function         bta_pan_tx_flow
 714 **
 715 ** Description      Set the application flow control state.
 716 **
 717 **
 718 ** Returns          void
 719 **
 720 *******************************************************************************/
 721 void bta_pan_tx_flow(tBTA_PAN_SCB *p_scb, tBTA_PAN_DATA *p_data)
 722 {
 723     p_scb->app_flow_enable = p_data->ci_tx_flow.enable;
 724 }
 725
 726 /*******************************************************************************
 727 **
 728 ** Function         bta_pan_write_buf
 729 **
 730 ** Description      Handle a bta_pan_ci_rx_writebuf() and send data to PAN.
 731 **
 732 **
 733 ** Returns          void
 734 **
 735 *******************************************************************************/
 736 void bta_pan_write_buf(tBTA_PAN_SCB *p_scb, tBTA_PAN_DATA *p_data)
 737 {
 738     if ((bta_pan_cb.flow_mask & BTA_PAN_RX_MASK) == BTA_PAN_RX_PUSH_BUF)
 739     {
 740         bta_pan_pm_conn_busy(p_scb);
 741
 742         PAN_WriteBuf (p_scb->handle,
 743                       ((tBTA_PAN_DATA_PARAMS *)p_data)->dst,
 744                       ((tBTA_PAN_DATA_PARAMS *)p_data)->src,
 745                       ((tBTA_PAN_DATA_PARAMS *)p_data)->protocol,
 746                       (BT_HDR *)p_data,
 747                       ((tBTA_PAN_DATA_PARAMS *)p_data)->ext);
 748         bta_pan_pm_conn_idle(p_scb);
 749
 750     }
 751 }
 752
 753 /*******************************************************************************
 754 **
 755 ** Function         bta_pan_free_buf
 756 **
 757 ** Description      Frees the data buffer during closing state
 758 **
 759 **
 760 ** Returns          void
 761 **
 762 *******************************************************************************/
 763 void bta_pan_free_buf(tBTA_PAN_SCB *p_scb, tBTA_PAN_DATA *p_data)
 764 {
 765     UNUSED(p_scb);
 766     osi_free(p_data);
 767 }
 768
 769 #endif /* PAN_INCLUDED */