/*******************************************************************************
**
** Function avdt_ad_open_req
**
** Description This function is called by a CCB or SCB to open a transport
** channel. This function allocates and initializes a
** transport channel table entry. The channel can be opened
** in two roles: as an initiator or acceptor. When opened
** as an initiator the function will start an L2CAP connection.
** When opened as an acceptor the function simply configures
** the table entry to listen for an incoming channel.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avdt_ad_open_req(UINT8 type, tAVDT_CCB *p_ccb, tAVDT_SCB *p_scb, UINT8 role)
{
tAVDT_TC_TBL *p_tbl;
UINT16 lcid;
if ((p_tbl = avdt_ad_tc_tbl_alloc(p_ccb)) == NULL) {
AVDT_TRACE_ERROR("avdt_ad_open_req: Cannot allocate p_tbl");
return;
}
p_tbl->tcid = avdt_ad_type_to_tcid(type, p_scb);
AVDT_TRACE_DEBUG("avdt_ad_open_req: type: %d, role: %d, tcid:%d\n",
type, role, p_tbl->tcid);
if (type == AVDT_CHAN_SIG) {
/* if signaling, get mtu from registration control block */
p_tbl->my_mtu = avdt_cb.rcb.ctrl_mtu;
p_tbl->my_flush_to = L2CAP_DEFAULT_FLUSH_TO;
} else {
/* otherwise get mtu from scb */
p_tbl->my_mtu = p_scb->cs.mtu;
p_tbl->my_flush_to = p_scb->cs.flush_to;
/* also set scb_hdl in rt_tbl */
avdt_cb.ad.rt_tbl[avdt_ccb_to_idx(p_ccb)][p_tbl->tcid].scb_hdl = avdt_scb_to_hdl(p_scb);
AVDT_TRACE_DEBUG("avdt_cb.ad.rt_tbl[%d][%d].scb_hdl = %d\n",
avdt_ccb_to_idx(p_ccb), p_tbl->tcid,
avdt_scb_to_hdl(p_scb));
}
/* if we're acceptor, we're done; just sit back and listen */
if (role == AVDT_ACP) {
p_tbl->state = AVDT_AD_ST_ACP;
}
/* else we're inititator, start the L2CAP connection */
else {
p_tbl->state = AVDT_AD_ST_CONN;
/* call l2cap connect req */
if ((lcid = L2CA_ConnectReq(AVDT_PSM, p_ccb->peer_addr)) != 0) {
/* if connect req ok, store tcid in lcid table */
avdt_cb.ad.lcid_tbl[lcid - L2CAP_BASE_APPL_CID] = avdt_ad_tc_tbl_to_idx(p_tbl);
AVDT_TRACE_DEBUG("avdt_cb.ad.lcid_tbl[%d] = %d\n",
(lcid - L2CAP_BASE_APPL_CID), avdt_ad_tc_tbl_to_idx(p_tbl));
avdt_cb.ad.rt_tbl[avdt_ccb_to_idx(p_ccb)][p_tbl->tcid].lcid = lcid;
AVDT_TRACE_DEBUG("avdt_cb.ad.rt_tbl[%d][%d].lcid = 0x%x\n",
avdt_ccb_to_idx(p_ccb), p_tbl->tcid,
lcid);
} else {
/* if connect req failed, call avdt_ad_tc_close_ind() */
avdt_ad_tc_close_ind(p_tbl, 0);
}
}
}
/*******************************************************************************
**
** Function avdt_l2c_connect_ind_cback
**
** Description This is the L2CAP connect indication callback function.
**
**
** Returns void
**
*******************************************************************************/
void avdt_l2c_connect_ind_cback(BD_ADDR bd_addr, UINT16 lcid, UINT16 psm, UINT8 id)
{
tAVDT_CCB *p_ccb;
tAVDT_TC_TBL *p_tbl = NULL;
UINT16 result;
tL2CAP_CFG_INFO cfg;
tBTM_STATUS rc;
UNUSED(psm);
/* do we already have a control channel for this peer? */
if ((p_ccb = avdt_ccb_by_bd(bd_addr)) == NULL) {
/* no, allocate ccb */
if ((p_ccb = avdt_ccb_alloc(bd_addr)) == NULL) {
/* no ccb available, reject L2CAP connection */
result = L2CAP_CONN_NO_RESOURCES;
} else {
/* allocate and set up entry; first channel is always signaling */
p_tbl = avdt_ad_tc_tbl_alloc(p_ccb);
p_tbl->my_mtu = avdt_cb.rcb.ctrl_mtu;
p_tbl->my_flush_to = L2CAP_DEFAULT_FLUSH_TO;
p_tbl->tcid = AVDT_CHAN_SIG;
p_tbl->lcid = lcid;
p_tbl->id = id;
p_tbl->state = AVDT_AD_ST_SEC_ACP;
p_tbl->cfg_flags = AVDT_L2C_CFG_CONN_ACP;
/* Check the security */
rc = btm_sec_mx_access_request (bd_addr, AVDT_PSM,
FALSE, BTM_SEC_PROTO_AVDT,
AVDT_CHAN_SIG,
&avdt_sec_check_complete_term, NULL);
if (rc == BTM_CMD_STARTED) {
L2CA_ConnectRsp (p_ccb->peer_addr, p_tbl->id, lcid, L2CAP_CONN_PENDING, L2CAP_CONN_OK);
}
return;
}
}
/* deal with simultaneous control channel connect case */
else if ((p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_SIG, p_ccb, AVDT_AD_ST_CONN)) != NULL) {
/* reject their connection */
result = L2CAP_CONN_NO_RESOURCES;
}
/* this must be a traffic channel; are we accepting a traffic channel
** for this ccb?
*/
else if ((p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_MEDIA, p_ccb, AVDT_AD_ST_ACP)) != NULL) {
/* yes; proceed with connection */
result = L2CAP_CONN_OK;
}
#if AVDT_REPORTING == TRUE
/* this must be a reporting channel; are we accepting a reporting channel
** for this ccb?
*/
else if ((p_tbl = avdt_ad_tc_tbl_by_st(AVDT_CHAN_REPORT, p_ccb, AVDT_AD_ST_ACP)) != NULL) {
/* yes; proceed with connection */
result = L2CAP_CONN_OK;
}
#endif
/* else we're not listening for traffic channel; reject */
else {
result = L2CAP_CONN_NO_PSM;
}
/* Send L2CAP connect rsp */
L2CA_ConnectRsp(bd_addr, id, lcid, result, 0);
/* if result ok, proceed with connection */
if (result == L2CAP_CONN_OK) {
/* store idx in LCID table, store LCID in routing table */
avdt_cb.ad.lcid_tbl[lcid - L2CAP_BASE_APPL_CID] = avdt_ad_tc_tbl_to_idx(p_tbl);
avdt_cb.ad.rt_tbl[avdt_ccb_to_idx(p_ccb)][p_tbl->tcid].lcid = lcid;
/* transition to configuration state */
p_tbl->state = AVDT_AD_ST_CFG;
/* Send L2CAP config req */
memset(&cfg, 0, sizeof(tL2CAP_CFG_INFO));
cfg.mtu_present = TRUE;
cfg.mtu = p_tbl->my_mtu;
cfg.flush_to_present = TRUE;
cfg.flush_to = p_tbl->my_flush_to;
L2CA_ConfigReq(lcid, &cfg);
}
}
