/*******************************************************************************
**
** Function llcp_init
**
** Description This function is called once at startup to initialize
** all the LLCP structures
**
** Returns void
**
*******************************************************************************/
void llcp_init (void)
{
UINT32 pool_count;
memset (&llcp_cb, 0, sizeof (tLLCP_CB));
llcp_cb.trace_level = LLCP_INITIAL_TRACE_LEVEL;
LLCP_TRACE_DEBUG0 ("LLCP - llcp_init ()");
llcp_cb.lcb.local_link_miu = (LLCP_MIU <= LLCP_MAX_MIU ? LLCP_MIU : LLCP_MAX_MIU);
llcp_cb.lcb.local_opt = LLCP_OPT_VALUE;
llcp_cb.lcb.local_wt = LLCP_WAITING_TIME;
llcp_cb.lcb.local_lto = LLCP_LTO_VALUE;
llcp_cb.lcb.inact_timeout_init = LLCP_INIT_INACTIVITY_TIMEOUT;
llcp_cb.lcb.inact_timeout_target = LLCP_TARGET_INACTIVITY_TIMEOUT;
llcp_cb.lcb.symm_delay = LLCP_DELAY_RESP_TIME;
llcp_cb.lcb.data_link_timeout = LLCP_DATA_LINK_CONNECTION_TOUT;
llcp_cb.lcb.delay_first_pdu_timeout = LLCP_DELAY_TIME_TO_SEND_FIRST_PDU;
llcp_cb.lcb.wks = LLCP_WKS_MASK_LM;
/* total number of buffers for LLCP */
pool_count = GKI_poolcount (LLCP_POOL_ID);
/* number of buffers for receiving data */
llcp_cb.num_rx_buff = (pool_count * LLCP_RX_BUFF_RATIO) / 100;
/* rx congestion start/end threshold */
llcp_cb.overall_rx_congest_start = (UINT8) ((llcp_cb.num_rx_buff * LLCP_RX_CONGEST_START) / 100);
llcp_cb.overall_rx_congest_end = (UINT8) ((llcp_cb.num_rx_buff * LLCP_RX_CONGEST_END) / 100);
/* max number of buffers for receiving data on logical data link */
llcp_cb.max_num_ll_rx_buff = (UINT8) ((llcp_cb.num_rx_buff * LLCP_LL_RX_BUFF_LIMIT) / 100);
LLCP_TRACE_DEBUG4 ("num_rx_buff = %d, rx_congest_start = %d, rx_congest_end = %d, max_num_ll_rx_buff = %d",
llcp_cb.num_rx_buff, llcp_cb.overall_rx_congest_start,
llcp_cb.overall_rx_congest_end, llcp_cb.max_num_ll_rx_buff);
/* max number of buffers for transmitting data */
llcp_cb.max_num_tx_buff = (UINT8) (pool_count - llcp_cb.num_rx_buff);
/* max number of buffers for transmitting data on logical data link */
llcp_cb.max_num_ll_tx_buff = (UINT8) ((llcp_cb.max_num_tx_buff * LLCP_LL_TX_BUFF_LIMIT) / 100);
LLCP_TRACE_DEBUG2 ("max_num_tx_buff = %d, max_num_ll_tx_buff = %d",
llcp_cb.max_num_tx_buff, llcp_cb.max_num_ll_tx_buff);
llcp_cb.ll_tx_uncongest_ntf_start_sap = LLCP_SAP_SDP + 1;
LLCP_RegisterServer (LLCP_SAP_SDP, LLCP_LINK_TYPE_DATA_LINK_CONNECTION, "urn:nfc:sn:sdp", llcp_sdp_proc_data);
}
/*******************************************************************************
**
** Function llcp_sdp_return_sap
**
** Description Report TID and SAP to requester
**
**
** Returns void
**
*******************************************************************************/
static void llcp_sdp_return_sap (UINT8 tid, UINT8 sap)
{
UINT8 i;
LLCP_TRACE_DEBUG2 ("llcp_sdp_return_sap (): tid=0x%x, SAP=0x%x", tid, sap);
for (i = 0; i < LLCP_MAX_SDP_TRANSAC; i++)
{
if ( (llcp_cb.sdp_cb.transac[i].p_cback)
&&(llcp_cb.sdp_cb.transac[i].tid == tid) )
{
(*llcp_cb.sdp_cb.transac[i].p_cback) (tid, sap);
llcp_cb.sdp_cb.transac[i].p_cback = NULL;
}
}
}
/*******************************************************************************
**
** Function llcp_util_allocate_data_link
**
** Description Allocate tLLCP_DLCB for data link connection
**
** Returns tLLCP_DLCB *
**
******************************************************************************/
tLLCP_DLCB *llcp_util_allocate_data_link (UINT8 reg_sap, UINT8 remote_sap)
{
tLLCP_DLCB *p_dlcb = NULL;
int idx;
LLCP_TRACE_DEBUG2 ("llcp_util_allocate_data_link (): reg_sap = 0x%x, remote_sap = 0x%x",
reg_sap, remote_sap);
for (idx = 0; idx < LLCP_MAX_DATA_LINK; idx++)
{
if (llcp_cb.dlcb[idx].state == LLCP_DLC_STATE_IDLE)
{
p_dlcb = &(llcp_cb.dlcb[idx]);
memset (p_dlcb, 0, sizeof (tLLCP_DLCB));
break;
}
}
if (!p_dlcb)
{
LLCP_TRACE_ERROR0 ("llcp_util_allocate_data_link (): Out of DLCB");
}
else
{
p_dlcb->p_app_cb = llcp_util_get_app_cb (reg_sap);
p_dlcb->local_sap = reg_sap;
p_dlcb->remote_sap = remote_sap;
p_dlcb->timer.param = (TIMER_PARAM_TYPE) p_dlcb;
/* this is for inactivity timer and congestion control. */
llcp_cb.num_data_link_connection++;
LLCP_TRACE_DEBUG3 ("llcp_util_allocate_data_link (): local_sap = 0x%x, remote_sap = 0x%x, num_data_link_connection = %d",
p_dlcb->local_sap, p_dlcb->remote_sap, llcp_cb.num_data_link_connection);
}
return p_dlcb;
}
/*******************************************************************************
**
** Function llcp_sdp_send_sdres
**
** Description Send Service Discovery Response
**
**
** Returns LLCP_STATUS
**
*******************************************************************************/
static tLLCP_STATUS llcp_sdp_send_sdres (UINT8 tid, UINT8 sap)
{
tLLCP_STATUS status;
UINT16 available_bytes;
LLCP_TRACE_DEBUG2 ("llcp_sdp_send_sdres (): tid=0x%x, SAP=0x%x", tid, sap);
/* if there is no pending SNL */
if (!llcp_cb.sdp_cb.p_snl)
{
llcp_cb.sdp_cb.p_snl = (BT_HDR*) GKI_getpoolbuf (LLCP_POOL_ID);
if (llcp_cb.sdp_cb.p_snl)
{
llcp_cb.sdp_cb.p_snl->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE + LLCP_PDU_HEADER_SIZE;
llcp_cb.sdp_cb.p_snl->len = 0;
}
}
if (llcp_cb.sdp_cb.p_snl)
{
available_bytes = GKI_get_buf_size (llcp_cb.sdp_cb.p_snl)
- BT_HDR_SIZE - llcp_cb.sdp_cb.p_snl->offset
- llcp_cb.sdp_cb.p_snl->len;
/* if SDRES parameter can be added in SNL */
if ( (available_bytes >= 2 + LLCP_SDRES_LEN)
&&(llcp_cb.sdp_cb.p_snl->len + 2 + LLCP_SDRES_LEN <= llcp_cb.lcb.effective_miu) )
{
llcp_sdp_add_sdres (tid, sap);
status = LLCP_STATUS_SUCCESS;
}
else
{
/* send pending SNL PDU to LM */
llcp_sdp_check_send_snl ();
llcp_cb.sdp_cb.p_snl = (BT_HDR*) GKI_getpoolbuf (LLCP_POOL_ID);
if (llcp_cb.sdp_cb.p_snl)
{
llcp_cb.sdp_cb.p_snl->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE + LLCP_PDU_HEADER_SIZE;
llcp_cb.sdp_cb.p_snl->len = 0;
llcp_sdp_add_sdres (tid, sap);
status = LLCP_STATUS_SUCCESS;
}
else
{
status = LLCP_STATUS_FAIL;
}
}
}
else
{
status = LLCP_STATUS_FAIL;
}
/* if LM is waiting for PDUs from upper layer */
if ( (status == LLCP_STATUS_SUCCESS)
&&(llcp_cb.lcb.symm_state == LLCP_LINK_SYMM_LOCAL_XMIT_NEXT) )
{
llcp_link_check_send_data ();
}
return status;
}
