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      1 /******************************************************************************
      2  *
      3  *  Copyright (C) 1999-2012 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 state machine and action routines for multiplexer
     22  *  channel of the RFCOMM unit
     23  *
     24  ******************************************************************************/
     25 #include <string.h>
     26 #include "gki.h"
     27 #include "bt_types.h"
     28 #include "rfcdefs.h"
     29 #include "l2cdefs.h"
     30 #include "port_api.h"
     31 #include "port_int.h"
     32 #include "l2c_api.h"
     33 #include "rfc_int.h"
     34 #include "bt_utils.h"
     35 
     36 #define L2CAP_SUCCESS   0
     37 #define L2CAP_ERROR     1
     38 
     39 
     40 /********************************************************************************/
     41 /*              L O C A L    F U N C T I O N     P R O T O T Y P E S            */
     42 /********************************************************************************/
     43 static void rfc_mx_sm_state_idle (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
     44 static void rfc_mx_sm_state_wait_conn_cnf (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
     45 static void rfc_mx_sm_state_configure (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
     46 static void rfc_mx_sm_sabme_wait_ua (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
     47 static void rfc_mx_sm_state_wait_sabme (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
     48 static void rfc_mx_sm_state_connected (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
     49 static void rfc_mx_sm_state_disc_wait_ua (tRFC_MCB *p_mcb, UINT16 event, void *p_data);
     50 
     51 static void rfc_mx_send_config_req (tRFC_MCB *p_mcb);
     52 static void rfc_mx_conf_ind (tRFC_MCB *p_mcb, tL2CAP_CFG_INFO *p_cfg);
     53 static void rfc_mx_conf_cnf (tRFC_MCB *p_mcb, tL2CAP_CFG_INFO *p_cfg);
     54 
     55 
     56 
     57 /*******************************************************************************
     58 **
     59 ** Function         rfc_mx_sm_execute
     60 **
     61 ** Description      This function sends multiplexor events through the state
     62 **                  machine.
     63 **
     64 ** Returns          void
     65 **
     66 *******************************************************************************/
     67 void rfc_mx_sm_execute (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
     68 {
     69     switch (p_mcb->state)
     70     {
     71     case RFC_MX_STATE_IDLE:
     72         rfc_mx_sm_state_idle (p_mcb, event, p_data);
     73         break;
     74 
     75     case RFC_MX_STATE_WAIT_CONN_CNF:
     76         rfc_mx_sm_state_wait_conn_cnf (p_mcb, event, p_data);
     77         break;
     78 
     79     case RFC_MX_STATE_CONFIGURE:
     80         rfc_mx_sm_state_configure (p_mcb, event, p_data);
     81         break;
     82 
     83     case RFC_MX_STATE_SABME_WAIT_UA:
     84         rfc_mx_sm_sabme_wait_ua (p_mcb, event, p_data);
     85         break;
     86 
     87     case RFC_MX_STATE_WAIT_SABME:
     88         rfc_mx_sm_state_wait_sabme (p_mcb, event, p_data);
     89         break;
     90 
     91     case RFC_MX_STATE_CONNECTED:
     92         rfc_mx_sm_state_connected (p_mcb, event, p_data);
     93         break;
     94 
     95     case RFC_MX_STATE_DISC_WAIT_UA:
     96         rfc_mx_sm_state_disc_wait_ua (p_mcb, event, p_data);
     97         break;
     98 
     99     }
    100 }
    101 
    102 
    103 /*******************************************************************************
    104 **
    105 ** Function         rfc_mx_sm_state_idle
    106 **
    107 ** Description      This function handles events when the multiplexer is in
    108 **                  IDLE state. This state exists when connection is being
    109 **                  initially established.
    110 **
    111 ** Returns          void
    112 **
    113 *******************************************************************************/
    114 void rfc_mx_sm_state_idle (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
    115 {
    116     RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_idle - evt:%d", event);
    117     switch (event)
    118     {
    119     case RFC_MX_EVENT_START_REQ:
    120 
    121         /* Initialize L2CAP MTU */
    122         p_mcb->peer_l2cap_mtu = L2CAP_DEFAULT_MTU - RFCOMM_MIN_OFFSET - 1;
    123 
    124         if ((p_mcb->lcid = L2CA_ConnectReq (BT_PSM_RFCOMM, p_mcb->bd_addr)) == 0)
    125         {
    126             PORT_StartCnf (p_mcb, RFCOMM_ERROR);
    127             return;
    128         }
    129         /* Save entry for quicker access to mcb based on the LCID */
    130         rfc_save_lcid_mcb (p_mcb, p_mcb->lcid);
    131 
    132         p_mcb->state = RFC_MX_STATE_WAIT_CONN_CNF;
    133         return;
    134 
    135     case RFC_MX_EVENT_START_RSP:
    136     case RFC_MX_EVENT_CONN_CNF:
    137     case RFC_MX_EVENT_CONF_IND:
    138     case RFC_MX_EVENT_CONF_CNF:
    139         RFCOMM_TRACE_ERROR ("Mx error state %d event %d", p_mcb->state, event);
    140         return;
    141 
    142     case RFC_MX_EVENT_CONN_IND:
    143 
    144         rfc_timer_start (p_mcb, RFCOMM_CONN_TIMEOUT);
    145         L2CA_ConnectRsp (p_mcb->bd_addr, *((UINT8 *)p_data), p_mcb->lcid, L2CAP_CONN_OK, 0);
    146 
    147         rfc_mx_send_config_req (p_mcb);
    148 
    149         p_mcb->state = RFC_MX_STATE_CONFIGURE;
    150         return;
    151 
    152     case RFC_EVENT_SABME:
    153         break;
    154 
    155     case RFC_EVENT_UA:
    156     case RFC_EVENT_DM:
    157         return;
    158 
    159     case RFC_EVENT_DISC:
    160         rfc_send_dm (p_mcb, RFCOMM_MX_DLCI, TRUE);
    161         return;
    162 
    163     case RFC_EVENT_UIH:
    164         rfc_send_dm (p_mcb, RFCOMM_MX_DLCI, FALSE);
    165         return;
    166     }
    167     RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
    168 }
    169 
    170 
    171 /*******************************************************************************
    172 **
    173 ** Function         rfc_mx_sm_state_wait_conn_cnf
    174 **
    175 ** Description      This function handles events when the multiplexer is
    176 **                  waiting for Connection Confirm from L2CAP.
    177 **
    178 ** Returns          void
    179 **
    180 *******************************************************************************/
    181 void rfc_mx_sm_state_wait_conn_cnf (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
    182 {
    183     RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_wait_conn_cnf - evt:%d", event);
    184     switch (event)
    185     {
    186     case RFC_MX_EVENT_START_REQ:
    187         RFCOMM_TRACE_ERROR ("Mx error state %d event %d", p_mcb->state, event);
    188         return;
    189 
    190     /* There is some new timing so that Config Ind comes before security is completed
    191        so we are still waiting fo the confirmation. */
    192     case RFC_MX_EVENT_CONF_IND:
    193         rfc_mx_conf_ind (p_mcb, (tL2CAP_CFG_INFO *)p_data);
    194         return;
    195 
    196     case RFC_MX_EVENT_CONN_CNF:
    197         if (*((UINT16 *)p_data) != L2CAP_SUCCESS)
    198         {
    199             p_mcb->state = RFC_MX_STATE_IDLE;
    200 
    201             PORT_StartCnf (p_mcb, *((UINT16 *)p_data));
    202             return;
    203         }
    204         p_mcb->state = RFC_MX_STATE_CONFIGURE;
    205         rfc_mx_send_config_req (p_mcb);
    206         return;
    207 
    208     case RFC_MX_EVENT_DISC_IND:
    209         p_mcb->state = RFC_MX_STATE_IDLE;
    210         PORT_CloseInd (p_mcb);
    211         return;
    212 
    213     case RFC_EVENT_TIMEOUT:
    214         p_mcb->state = RFC_MX_STATE_IDLE;
    215         L2CA_DisconnectReq (p_mcb->lcid);
    216 
    217         /* we gave up outgoing connection request then try peer's request */
    218         if (p_mcb->pending_lcid)
    219         {
    220             UINT16 i;
    221             UINT8  idx;
    222 
    223             RFCOMM_TRACE_DEBUG ("RFCOMM MX retry as acceptor in collision case - evt:%d in state:%d", event, p_mcb->state);
    224 
    225             rfc_save_lcid_mcb (NULL, p_mcb->lcid);
    226             p_mcb->lcid = p_mcb->pending_lcid;
    227             rfc_save_lcid_mcb (p_mcb, p_mcb->lcid);
    228 
    229             p_mcb->is_initiator = FALSE;
    230 
    231             /* update direction bit */
    232             for (i = 0; i < RFCOMM_MAX_DLCI; i += 2)
    233             {
    234                 if ((idx = p_mcb->port_inx[i]) != 0)
    235                 {
    236                     p_mcb->port_inx[i] = 0;
    237                     p_mcb->port_inx[i+1] = idx;
    238                     rfc_cb.port.port[idx - 1].dlci += 1;
    239                     RFCOMM_TRACE_DEBUG ("RFCOMM MX - DLCI:%d -> %d", i, rfc_cb.port.port[idx - 1].dlci);
    240                 }
    241             }
    242 
    243             rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_CONN_IND, &(p_mcb->pending_id));
    244         }
    245         else
    246         {
    247             PORT_CloseInd (p_mcb);
    248         }
    249         return;
    250     }
    251     RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
    252 }
    253 
    254 
    255 /*******************************************************************************
    256 **
    257 ** Function         rfc_mx_sm_state_configure
    258 **
    259 ** Description      This function handles events when the multiplexer in the
    260 **                  configuration state.
    261 **
    262 ** Returns          void
    263 **
    264 *******************************************************************************/
    265 void rfc_mx_sm_state_configure (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
    266 {
    267     RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_configure - evt:%d", event);
    268     switch (event)
    269     {
    270     case RFC_MX_EVENT_START_REQ:
    271     case RFC_MX_EVENT_CONN_CNF:
    272 
    273         RFCOMM_TRACE_ERROR ("Mx error state %d event %d", p_mcb->state, event);
    274         return;
    275 
    276     case RFC_MX_EVENT_CONF_IND:
    277         rfc_mx_conf_ind (p_mcb, (tL2CAP_CFG_INFO *)p_data);
    278         return;
    279 
    280     case RFC_MX_EVENT_CONF_CNF:
    281         rfc_mx_conf_cnf (p_mcb, (tL2CAP_CFG_INFO *)p_data);
    282         return;
    283 
    284     case RFC_MX_EVENT_DISC_IND:
    285         p_mcb->state = RFC_MX_STATE_IDLE;
    286         PORT_CloseInd (p_mcb);
    287         return;
    288 
    289     case RFC_EVENT_TIMEOUT:
    290         p_mcb->state = RFC_MX_STATE_IDLE;
    291         L2CA_DisconnectReq (p_mcb->lcid);
    292 
    293         PORT_StartCnf (p_mcb, RFCOMM_ERROR);
    294         return;
    295     }
    296     RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
    297 }
    298 
    299 
    300 /*******************************************************************************
    301 **
    302 ** Function         rfc_mx_sm_sabme_wait_ua
    303 **
    304 ** Description      This function handles events when the multiplexer sent
    305 **                  SABME and is waiting for UA reply.
    306 **
    307 ** Returns          void
    308 **
    309 *******************************************************************************/
    310 void rfc_mx_sm_sabme_wait_ua (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
    311 {
    312     UNUSED(p_data);
    313 
    314     RFCOMM_TRACE_EVENT ("rfc_mx_sm_sabme_wait_ua - evt:%d", event);
    315     switch (event)
    316     {
    317     case RFC_MX_EVENT_START_REQ:
    318     case RFC_MX_EVENT_CONN_CNF:
    319         RFCOMM_TRACE_ERROR ("Mx error state %d event %d", p_mcb->state, event);
    320         return;
    321 
    322     /* workaround: we don't support reconfig */
    323     /* commented out until we support reconfig
    324     case RFC_MX_EVENT_CONF_IND:
    325         rfc_mx_conf_ind (p_mcb, (tL2CAP_CFG_INFO *)p_data);
    326         return;
    327 
    328     case RFC_MX_EVENT_CONF_CNF:
    329         rfc_mx_conf_cnf (p_mcb, (tL2CAP_CFG_INFO *)p_data);
    330         return;
    331     */
    332 
    333     case RFC_MX_EVENT_DISC_IND:
    334         p_mcb->state = RFC_MX_STATE_IDLE;
    335         PORT_CloseInd (p_mcb);
    336         return;
    337 
    338     case RFC_EVENT_UA:
    339         rfc_timer_stop (p_mcb);
    340 
    341         p_mcb->state      = RFC_MX_STATE_CONNECTED;
    342         p_mcb->peer_ready = TRUE;
    343 
    344         PORT_StartCnf (p_mcb, RFCOMM_SUCCESS);
    345         return;
    346 
    347     case RFC_EVENT_DM:
    348         rfc_timer_stop (p_mcb);
    349         /* Case falls through */
    350 
    351     case RFC_MX_EVENT_CONF_IND: /* workaround: we don't support reconfig */
    352     case RFC_MX_EVENT_CONF_CNF: /* workaround: we don't support reconfig */
    353     case RFC_EVENT_TIMEOUT:
    354         p_mcb->state = RFC_MX_STATE_IDLE;
    355         L2CA_DisconnectReq (p_mcb->lcid);
    356 
    357         PORT_StartCnf (p_mcb, RFCOMM_ERROR);
    358         return;
    359     }
    360     RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
    361 }
    362 
    363 /*******************************************************************************
    364 **
    365 ** Function         rfc_mx_sm_state_wait_sabme
    366 **
    367 ** Description      This function handles events when the multiplexer is
    368 **                  waiting for SABME on the acceptor side after configuration
    369 **
    370 ** Returns          void
    371 **
    372 *******************************************************************************/
    373 void rfc_mx_sm_state_wait_sabme (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
    374 {
    375     RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_wait_sabme - evt:%d", event);
    376     switch (event)
    377     {
    378     case RFC_MX_EVENT_DISC_IND:
    379         p_mcb->state = RFC_MX_STATE_IDLE;
    380         PORT_CloseInd (p_mcb);
    381         return;
    382 
    383     case RFC_EVENT_SABME:
    384         /* if we gave up outgoing connection request */
    385         if (p_mcb->pending_lcid)
    386         {
    387             p_mcb->pending_lcid = 0;
    388 
    389             rfc_send_ua (p_mcb, RFCOMM_MX_DLCI);
    390 
    391             rfc_timer_stop (p_mcb);
    392             p_mcb->state      = RFC_MX_STATE_CONNECTED;
    393             p_mcb->peer_ready = TRUE;
    394 
    395             /* MX channel collision has been resolved, continue to open ports */
    396             PORT_StartCnf (p_mcb, RFCOMM_SUCCESS);
    397         }
    398         else
    399         {
    400             rfc_timer_stop (p_mcb);
    401             PORT_StartInd (p_mcb);
    402         }
    403         return;
    404 
    405     case RFC_MX_EVENT_START_RSP:
    406         if (*((UINT16 *)p_data) != RFCOMM_SUCCESS)
    407             rfc_send_dm (p_mcb, RFCOMM_MX_DLCI, TRUE);
    408         else
    409         {
    410             rfc_send_ua (p_mcb, RFCOMM_MX_DLCI);
    411 
    412             p_mcb->state      = RFC_MX_STATE_CONNECTED;
    413             p_mcb->peer_ready = TRUE;
    414         }
    415         return;
    416 
    417     case RFC_MX_EVENT_CONF_IND: /* workaround: we don't support reconfig */
    418     case RFC_MX_EVENT_CONF_CNF: /* workaround: we don't support reconfig */
    419     case RFC_EVENT_TIMEOUT:
    420         p_mcb->state = RFC_MX_STATE_IDLE;
    421         L2CA_DisconnectReq (p_mcb->lcid);
    422 
    423         PORT_CloseInd (p_mcb);
    424         return;
    425     }
    426     RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
    427 }
    428 
    429 
    430 /*******************************************************************************
    431 **
    432 ** Function         rfc_mx_sm_state_connected
    433 **
    434 ** Description      This function handles events when the multiplexer is
    435 **                  in the CONNECTED state
    436 **
    437 ** Returns          void
    438 **
    439 *******************************************************************************/
    440 void rfc_mx_sm_state_connected (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
    441 {
    442     UNUSED(p_data);
    443 
    444     RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_connected - evt:%d", event);
    445 
    446     switch (event)
    447     {
    448     case RFC_EVENT_TIMEOUT:
    449     case RFC_MX_EVENT_CLOSE_REQ:
    450         rfc_timer_start (p_mcb, RFC_DISC_TIMEOUT);
    451         p_mcb->state = RFC_MX_STATE_DISC_WAIT_UA;
    452         rfc_send_disc (p_mcb, RFCOMM_MX_DLCI);
    453         return;
    454 
    455     case RFC_MX_EVENT_DISC_IND:
    456         p_mcb->state = RFC_MX_STATE_IDLE;
    457         PORT_CloseInd (p_mcb);
    458         return;
    459 
    460     case RFC_EVENT_DISC:
    461         /* Reply with UA.  If initiator bring down L2CAP connection */
    462         /* If server wait for some time if client decide to reinitiate channel */
    463         rfc_send_ua (p_mcb, RFCOMM_MX_DLCI);
    464         if (p_mcb->is_initiator)
    465         {
    466             L2CA_DisconnectReq (p_mcb->lcid);
    467         }
    468         /* notify all ports that connection is gone */
    469         PORT_CloseInd (p_mcb);
    470         return;
    471     }
    472     RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
    473 }
    474 
    475 
    476 /*******************************************************************************
    477 **
    478 ** Function         rfc_mx_sm_state_disc_wait_ua
    479 **
    480 ** Description      This function handles events when the multiplexer sent
    481 **                  DISC and is waiting for UA reply.
    482 **
    483 ** Returns          void
    484 **
    485 *******************************************************************************/
    486 void rfc_mx_sm_state_disc_wait_ua (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
    487 {
    488     BT_HDR *p_buf;
    489 
    490     RFCOMM_TRACE_EVENT ("rfc_mx_sm_state_disc_wait_ua - evt:%d", event);
    491     switch (event)
    492     {
    493     case RFC_EVENT_UA:
    494     case RFC_EVENT_DM:
    495     case RFC_EVENT_TIMEOUT:
    496         L2CA_DisconnectReq (p_mcb->lcid);
    497 
    498         if (p_mcb->restart_required)
    499         {
    500             /* Start Request was received while disconnecting.  Execute it again */
    501             if ((p_mcb->lcid = L2CA_ConnectReq (BT_PSM_RFCOMM, p_mcb->bd_addr)) == 0)
    502             {
    503                 PORT_StartCnf (p_mcb, RFCOMM_ERROR);
    504                 return;
    505             }
    506             /* Save entry for quicker access to mcb based on the LCID */
    507             rfc_save_lcid_mcb (p_mcb, p_mcb->lcid);
    508 
    509             /* clean up before reuse it */
    510             while ((p_buf = (BT_HDR *)GKI_dequeue(&p_mcb->cmd_q)) != NULL)
    511                 GKI_freebuf(p_buf);
    512 
    513             rfc_timer_start (p_mcb, RFC_MCB_INIT_INACT_TIMER);
    514 
    515             p_mcb->is_initiator     = TRUE;
    516             p_mcb->restart_required = FALSE;
    517             p_mcb->local_cfg_sent   = FALSE;
    518             p_mcb->peer_cfg_rcvd    = FALSE;
    519 
    520             p_mcb->state = RFC_MX_STATE_WAIT_CONN_CNF;
    521             return;
    522         }
    523         rfc_release_multiplexer_channel (p_mcb);
    524         return;
    525 
    526     case RFC_EVENT_DISC:
    527         rfc_send_ua (p_mcb, RFCOMM_MX_DLCI);
    528         return;
    529 
    530     case RFC_EVENT_UIH:
    531         GKI_freebuf (p_data);
    532         rfc_send_dm (p_mcb, RFCOMM_MX_DLCI, FALSE);
    533         return;
    534 
    535     case RFC_MX_EVENT_START_REQ:
    536         p_mcb->restart_required = TRUE;
    537         return;
    538 
    539     case RFC_MX_EVENT_DISC_IND:
    540         p_mcb->state = RFC_MX_STATE_IDLE;
    541         PORT_CloseInd (p_mcb);
    542         return;
    543 
    544     case RFC_MX_EVENT_CLOSE_REQ:
    545         return;
    546 
    547     case RFC_MX_EVENT_QOS_VIOLATION_IND:
    548         break;
    549     }
    550     RFCOMM_TRACE_EVENT ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
    551 }
    552 
    553 
    554 /*******************************************************************************
    555 **
    556 ** Function         rfc_mx_send_config_req
    557 **
    558 ** Description      This function handles L2CA_ConnectInd message from the
    559 **                  L2CAP.  Accept connection.
    560 **
    561 *******************************************************************************/
    562 static void rfc_mx_send_config_req (tRFC_MCB *p_mcb)
    563 {
    564     tL2CAP_CFG_INFO cfg;
    565 
    566     RFCOMM_TRACE_EVENT ("rfc_mx_send_config_req");
    567 
    568     memset (&cfg, 0, sizeof (tL2CAP_CFG_INFO));
    569 
    570     cfg.mtu_present      = TRUE;
    571     cfg.mtu              = L2CAP_MTU_SIZE;
    572 
    573 /* Defaults set by memset
    574     cfg.flush_to_present = FALSE;
    575     cfg.qos_present      = FALSE;
    576     cfg.fcr_present      = FALSE;
    577     cfg.fcr.mode         = L2CAP_FCR_BASIC_MODE;
    578     cfg.fcs_present      = FALSE;
    579     cfg.fcs              = N/A when fcs_present is FALSE;
    580 */
    581     L2CA_ConfigReq (p_mcb->lcid, &cfg);
    582 }
    583 
    584 
    585 /*******************************************************************************
    586 **
    587 ** Function         rfc_mx_conf_cnf
    588 **
    589 ** Description      This function handles L2CA_ConfigCnf message from the
    590 **                  L2CAP.  If result is not success tell upper layer that
    591 **                  start has not been accepted.  If initiator send SABME
    592 **                  on DLCI 0.  T1 is still running.
    593 **
    594 *******************************************************************************/
    595 static void rfc_mx_conf_cnf (tRFC_MCB *p_mcb, tL2CAP_CFG_INFO *p_cfg)
    596 {
    597     RFCOMM_TRACE_EVENT ("rfc_mx_conf_cnf p_cfg:%08x res:%d ", p_cfg, (p_cfg) ? p_cfg->result : 0);
    598 
    599     if (p_cfg->result != L2CAP_CFG_OK)
    600     {
    601         if (p_mcb->is_initiator)
    602         {
    603             PORT_StartCnf (p_mcb, p_cfg->result);
    604             L2CA_DisconnectReq (p_mcb->lcid);
    605         }
    606         rfc_release_multiplexer_channel (p_mcb);
    607         return;
    608     }
    609 
    610     p_mcb->local_cfg_sent = TRUE;
    611     if ((p_mcb->state == RFC_MX_STATE_CONFIGURE) && p_mcb->peer_cfg_rcvd)
    612     {
    613         if (p_mcb->is_initiator)
    614         {
    615             p_mcb->state = RFC_MX_STATE_SABME_WAIT_UA;
    616             rfc_send_sabme (p_mcb, RFCOMM_MX_DLCI);
    617             rfc_timer_start (p_mcb, RFC_T1_TIMEOUT);
    618         }
    619         else
    620         {
    621             p_mcb->state = RFC_MX_STATE_WAIT_SABME;
    622             rfc_timer_start (p_mcb, RFCOMM_CONN_TIMEOUT); /* - increased from T2=20 to CONN=120
    623                                                 to allow the user more than 10 sec to type in the
    624                                                 pin which can be e.g. 16 digits */
    625         }
    626     }
    627 }
    628 
    629 
    630 /*******************************************************************************
    631 **
    632 ** Function         rfc_mx_conf_ind
    633 **
    634 ** Description      This function handles L2CA_ConfigInd message from the
    635 **                  L2CAP.  Send the L2CA_ConfigRsp message.
    636 **
    637 *******************************************************************************/
    638 static void rfc_mx_conf_ind (tRFC_MCB *p_mcb, tL2CAP_CFG_INFO *p_cfg)
    639 {
    640     /* Save peer L2CAP MTU if present */
    641     /* RFCOMM adds 3-4 bytes in the beginning and 1 bytes FCS */
    642     if (p_cfg->mtu_present)
    643         p_mcb->peer_l2cap_mtu = p_cfg->mtu - RFCOMM_MIN_OFFSET - 1;
    644     else
    645         p_mcb->peer_l2cap_mtu = L2CAP_DEFAULT_MTU - RFCOMM_MIN_OFFSET - 1;
    646 
    647     p_cfg->mtu_present      = FALSE;
    648     p_cfg->flush_to_present = FALSE;
    649     p_cfg->qos_present      = FALSE;
    650 
    651     p_cfg->result = L2CAP_CFG_OK;
    652 
    653     L2CA_ConfigRsp (p_mcb->lcid, p_cfg);
    654 
    655     p_mcb->peer_cfg_rcvd = TRUE;
    656     if ((p_mcb->state == RFC_MX_STATE_CONFIGURE) && p_mcb->local_cfg_sent)
    657     {
    658         if (p_mcb->is_initiator)
    659         {
    660             p_mcb->state = RFC_MX_STATE_SABME_WAIT_UA;
    661             rfc_send_sabme (p_mcb, RFCOMM_MX_DLCI);
    662             rfc_timer_start (p_mcb, RFC_T1_TIMEOUT);
    663         }
    664         else
    665         {
    666             p_mcb->state = RFC_MX_STATE_WAIT_SABME;
    667             rfc_timer_start (p_mcb, RFCOMM_CONN_TIMEOUT); /* - increased from T2=20 to CONN=120
    668                                                 to allow the user more than 10 sec to type in the
    669                                                 pin which can be e.g. 16 digits */
    670         }
    671     }
    672 }
    673