/*******************************************************************************
**
** Function l2c_rcv_acl_data
**
** Description This function is called from the HCI Interface when an ACL
** data packet is received.
**
** Returns void
**
*******************************************************************************/
void l2c_rcv_acl_data (BT_HDR *p_msg)
{
UINT8 *p = (UINT8 *)(p_msg + 1) + p_msg->offset;
UINT16 handle, hci_len;
UINT8 pkt_type;
tL2C_LCB *p_lcb;
tL2C_CCB *p_ccb = NULL;
UINT16 l2cap_len, rcv_cid, psm;
/* Extract the handle */
STREAM_TO_UINT16 (handle, p);
pkt_type = HCID_GET_EVENT (handle);
handle = HCID_GET_HANDLE (handle);
/* Since the HCI Transport is putting segmented packets back together, we */
/* should never get a valid packet with the type set to "continuation" */
if (pkt_type != L2CAP_PKT_CONTINUE)
{
/* Find the LCB based on the handle */
if ((p_lcb = l2cu_find_lcb_by_handle (handle)) == NULL)
{
UINT8 cmd_code;
/* There is a slight possibility (specifically with USB) that we get an */
/* L2CAP connection request before we get the HCI connection complete. */
/* So for these types of messages, hold them for up to 2 seconds. */
STREAM_TO_UINT16 (hci_len, p);
STREAM_TO_UINT16 (l2cap_len, p);
STREAM_TO_UINT16 (rcv_cid, p);
STREAM_TO_UINT8 (cmd_code, p);
if ((p_msg->layer_specific == 0) && (rcv_cid == L2CAP_SIGNALLING_CID)
&& (cmd_code == L2CAP_CMD_INFO_REQ || cmd_code == L2CAP_CMD_CONN_REQ))
{
L2CAP_TRACE_WARNING5 ("L2CAP - holding ACL for unknown handle:%d ls:%d cid:%d opcode:%d cur count:%d",
handle, p_msg->layer_specific, rcv_cid, cmd_code,
l2cb.rcv_hold_q.count);
p_msg->layer_specific = 2;
GKI_enqueue (&l2cb.rcv_hold_q, p_msg);
if (l2cb.rcv_hold_q.count == 1)
btu_start_timer (&l2cb.rcv_hold_tle, BTU_TTYPE_L2CAP_HOLD, BT_1SEC_TIMEOUT);
return;
}
else
{
L2CAP_TRACE_ERROR5 ("L2CAP - rcvd ACL for unknown handle:%d ls:%d cid:%d opcode:%d cur count:%d",
handle, p_msg->layer_specific, rcv_cid, cmd_code, l2cb.rcv_hold_q.count);
}
GKI_freebuf (p_msg);
return;
}
}
else
{
L2CAP_TRACE_WARNING1 ("L2CAP - expected pkt start or complete, got: %d", pkt_type);
GKI_freebuf (p_msg);
return;
}
/* Extract the length and update the buffer header */
STREAM_TO_UINT16 (hci_len, p);
p_msg->offset += 4;
#if (L2CAP_HOST_FLOW_CTRL == TRUE)
/* Send ack if we hit the threshold */
if (++p_lcb->link_pkts_unacked >= p_lcb->link_ack_thresh)
btu_hcif_send_host_rdy_for_data();
#endif
/* Extract the length and CID */
STREAM_TO_UINT16 (l2cap_len, p);
STREAM_TO_UINT16 (rcv_cid, p);
/* Find the CCB for this CID */
if (rcv_cid >= L2CAP_BASE_APPL_CID)
{
if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, rcv_cid)) == NULL)
{
L2CAP_TRACE_WARNING1 ("L2CAP - unknown CID: 0x%04x", rcv_cid);
GKI_freebuf (p_msg);
return;
}
}
if (hci_len >= L2CAP_PKT_OVERHEAD) /* Must receive at least the L2CAP length and CID.*/
{
p_msg->len = hci_len - L2CAP_PKT_OVERHEAD;
p_msg->offset += L2CAP_PKT_OVERHEAD;
}
else
{
L2CAP_TRACE_WARNING0 ("L2CAP - got incorrect hci header" );
GKI_freebuf (p_msg);
return;
}
if (l2cap_len != p_msg->len)
{
L2CAP_TRACE_WARNING2 ("L2CAP - bad length in pkt. Exp: %d Act: %d",
l2cap_len, p_msg->len);
GKI_freebuf (p_msg);
return;
}
/* Send the data through the channel state machine */
if (rcv_cid == L2CAP_SIGNALLING_CID)
{
process_l2cap_cmd (p_lcb, p, l2cap_len);
GKI_freebuf (p_msg);
}
else if (rcv_cid == L2CAP_CONNECTIONLESS_CID)
{
/* process_connectionless_data (p_lcb); */
STREAM_TO_UINT16 (psm, p);
L2CAP_TRACE_DEBUG1( "GOT CONNECTIONLESS DATA PSM:%d", psm ) ;
#if (TCS_BCST_SETUP_INCLUDED == TRUE && TCS_INCLUDED == TRUE)
if (psm == TCS_PSM_INTERCOM || psm == TCS_PSM_CORDLESS)
{
p_msg->offset += L2CAP_BCST_OVERHEAD;
p_msg->len -= L2CAP_BCST_OVERHEAD;
tcs_proc_bcst_msg( p_lcb->remote_bd_addr, p_msg ) ;
GKI_freebuf (p_msg);
}
else
#endif
#if (L2CAP_UCD_INCLUDED == TRUE)
/* if it is not broadcast, check UCD registration */
if ( l2c_ucd_check_rx_pkts( p_lcb, p_msg ) )
{
/* nothing to do */
}
else
#endif
GKI_freebuf (p_msg);
}
#if (BLE_INCLUDED == TRUE)
else if (rcv_cid == L2CAP_BLE_SIGNALLING_CID)
{
l2cble_process_sig_cmd (p_lcb, p, l2cap_len);
GKI_freebuf (p_msg);
}
#endif
#if (L2CAP_NUM_FIXED_CHNLS > 0)
else if ((rcv_cid >= L2CAP_FIRST_FIXED_CHNL) && (rcv_cid <= L2CAP_LAST_FIXED_CHNL) &&
(l2cb.fixed_reg[rcv_cid - L2CAP_FIRST_FIXED_CHNL].pL2CA_FixedData_Cb != NULL) )
{
/* If no CCB for this channel, allocate one */
if (l2cu_initialize_fixed_ccb (p_lcb, rcv_cid, &l2cb.fixed_reg[rcv_cid - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts))
{
p_ccb = p_lcb->p_fixed_ccbs[rcv_cid - L2CAP_FIRST_FIXED_CHNL];
if (p_ccb->peer_cfg.fcr.mode != L2CAP_FCR_BASIC_MODE)
l2c_fcr_proc_pdu (p_ccb, p_msg);
else
(*l2cb.fixed_reg[rcv_cid - L2CAP_FIRST_FIXED_CHNL].pL2CA_FixedData_Cb)(p_lcb->remote_bd_addr, p_msg);
}
else
GKI_freebuf (p_msg);
}
#endif
else
{
if (p_ccb == NULL)
GKI_freebuf (p_msg);
else
{
/* Basic mode packets go straight to the state machine */
if (p_ccb->peer_cfg.fcr.mode == L2CAP_FCR_BASIC_MODE)
l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DATA, p_msg);
else
{
/* eRTM or streaming mode, so we need to validate states first */
if ((p_ccb->chnl_state == CST_OPEN) || (p_ccb->chnl_state == CST_CONFIG))
l2c_fcr_proc_pdu (p_ccb, p_msg);
else
GKI_freebuf (p_msg);
}
}
}
}
/*******************************************************************************
**
** Function l2c_rcv_acl_data
**
** Description This function is called from the HCI Interface when an ACL
** data packet is received.
**
** Returns void
**
*******************************************************************************/
void l2c_rcv_acl_data (BT_HDR *p_msg)
{
UINT8 *p = (UINT8 *)(p_msg + 1) + p_msg->offset;
UINT16 handle, hci_len;
UINT8 pkt_type;
tL2C_LCB *p_lcb;
tL2C_CCB *p_ccb = NULL;
UINT16 l2cap_len, rcv_cid, psm;
/* Extract the handle */
STREAM_TO_UINT16 (handle, p);
pkt_type = HCID_GET_EVENT (handle);
handle = HCID_GET_HANDLE (handle);
/* Since the HCI Transport is putting segmented packets back together, we */
/* should never get a valid packet with the type set to "continuation" */
if (pkt_type != L2CAP_PKT_CONTINUE) {
/* Find the LCB based on the handle */
if ((p_lcb = l2cu_find_lcb_by_handle (handle)) == NULL) {
UINT8 cmd_code;
/* There is a slight possibility (specifically with USB) that we get an */
/* L2CAP connection request before we get the HCI connection complete. */
/* So for these types of messages, hold them for up to 2 seconds. */
STREAM_TO_UINT16 (hci_len, p);
STREAM_TO_UINT16 (l2cap_len, p);
STREAM_TO_UINT16 (rcv_cid, p);
STREAM_TO_UINT8 (cmd_code, p);
if ((p_msg->layer_specific == 0) && (rcv_cid == L2CAP_SIGNALLING_CID)
&& (cmd_code == L2CAP_CMD_INFO_REQ || cmd_code == L2CAP_CMD_CONN_REQ)) {
L2CAP_TRACE_WARNING ("L2CAP - holding ACL for unknown handle:%d ls:%d"
" cid:%d opcode:%d cur count:%d", handle, p_msg->layer_specific,
rcv_cid, cmd_code, list_length(l2cb.rcv_pending_q));
p_msg->layer_specific = 2;
list_append(l2cb.rcv_pending_q, p_msg);
if (list_length(l2cb.rcv_pending_q) == 1) {
btu_start_timer (&l2cb.rcv_hold_tle, BTU_TTYPE_L2CAP_HOLD, BT_1SEC_TIMEOUT);
}
return;
} else {
L2CAP_TRACE_ERROR ("L2CAP - rcvd ACL for unknown handle:%d ls:%d cid:%d"
" opcode:%d cur count:%d", handle, p_msg->layer_specific, rcv_cid,
cmd_code, list_length(l2cb.rcv_pending_q));
}
GKI_freebuf (p_msg);
return;
}
} else {
L2CAP_TRACE_WARNING ("L2CAP - expected pkt start or complete, got: %d", pkt_type);
GKI_freebuf (p_msg);
return;
}
/* Extract the length and update the buffer header */
STREAM_TO_UINT16 (hci_len, p);
p_msg->offset += 4;
/* Extract the length and CID */
STREAM_TO_UINT16 (l2cap_len, p);
STREAM_TO_UINT16 (rcv_cid, p);
#if BLE_INCLUDED == TRUE
/* for BLE channel, always notify connection when ACL data received on the link */
if (p_lcb && p_lcb->transport == BT_TRANSPORT_LE && p_lcb->link_state != LST_DISCONNECTING)
/* only process fixed channel data as channel open indication when link is not in disconnecting mode */
{
l2cble_notify_le_connection(p_lcb->remote_bd_addr);
}
#endif
L2CAP_TRACE_DEBUG ("L2CAP - rcv_cid CID: 0x%04x\n", rcv_cid);
/* Find the CCB for this CID */
if (rcv_cid >= L2CAP_BASE_APPL_CID) {
if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, rcv_cid)) == NULL) {
L2CAP_TRACE_WARNING ("L2CAP - unknown CID: 0x%04x", rcv_cid);
GKI_freebuf (p_msg);
return;
}
}
if (hci_len >= L2CAP_PKT_OVERHEAD) { /* Must receive at least the L2CAP length and CID.*/
p_msg->len = hci_len - L2CAP_PKT_OVERHEAD;
p_msg->offset += L2CAP_PKT_OVERHEAD;
} else {
L2CAP_TRACE_WARNING ("L2CAP - got incorrect hci header" );
GKI_freebuf (p_msg);
return;
}
if (l2cap_len != p_msg->len) {
L2CAP_TRACE_WARNING ("L2CAP - bad length in pkt. Exp: %d Act: %d",
l2cap_len, p_msg->len);
GKI_freebuf (p_msg);
return;
}
/* Send the data through the channel state machine */
if (rcv_cid == L2CAP_SIGNALLING_CID) {
//counter_add("l2cap.sig.rx.bytes", l2cap_len);
//counter_add("l2cap.sig.rx.pkts", 1);
#if (CLASSIC_BT_INCLUDED == TRUE)
process_l2cap_cmd (p_lcb, p, l2cap_len);
#endif ///CLASSIC_BT_INCLUDED == TRUE
GKI_freebuf (p_msg);
} else if (rcv_cid == L2CAP_CONNECTIONLESS_CID) {
//counter_add("l2cap.ch2.rx.bytes", l2cap_len);
//counter_add("l2cap.ch2.rx.pkts", 1);
/* process_connectionless_data (p_lcb); */
STREAM_TO_UINT16 (psm, p);
L2CAP_TRACE_DEBUG( "GOT CONNECTIONLESS DATA PSM:%d", psm ) ;
#if (L2CAP_UCD_INCLUDED == TRUE)
/* if it is not broadcast, check UCD registration */
if ( l2c_ucd_check_rx_pkts( p_lcb, p_msg ) ) {
/* nothing to do */
} else
#endif
GKI_freebuf (p_msg);
}
#if (BLE_INCLUDED == TRUE)
else if (rcv_cid == L2CAP_BLE_SIGNALLING_CID) {
//counter_add("l2cap.ble.rx.bytes", l2cap_len);
//counter_add("l2cap.ble.rx.pkts", 1);
l2cble_process_sig_cmd (p_lcb, p, l2cap_len);
GKI_freebuf (p_msg);
}
#endif
#if (L2CAP_NUM_FIXED_CHNLS > 0)
else if ((rcv_cid >= L2CAP_FIRST_FIXED_CHNL) && (rcv_cid <= L2CAP_LAST_FIXED_CHNL) &&
(l2cb.fixed_reg[rcv_cid - L2CAP_FIRST_FIXED_CHNL].pL2CA_FixedData_Cb != NULL) ) {
//counter_add("l2cap.fix.rx.bytes", l2cap_len);
//counter_add("l2cap.fix.rx.pkts", 1);
/* If no CCB for this channel, allocate one */
if (p_lcb &&
/* only process fixed channel data when link is open or wait for data indication */
(p_lcb->link_state != LST_DISCONNECTING) &&
l2cu_initialize_fixed_ccb (p_lcb, rcv_cid, &l2cb.fixed_reg[rcv_cid - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts)) {
p_ccb = p_lcb->p_fixed_ccbs[rcv_cid - L2CAP_FIRST_FIXED_CHNL];
if (p_ccb->peer_cfg.fcr.mode != L2CAP_FCR_BASIC_MODE) {
#if (CLASSIC_BT_INCLUDED == TRUE)
l2c_fcr_proc_pdu (p_ccb, p_msg);
#endif ///CLASSIC_BT_INCLUDED == TRUE
} else
(*l2cb.fixed_reg[rcv_cid - L2CAP_FIRST_FIXED_CHNL].pL2CA_FixedData_Cb)
(rcv_cid, p_lcb->remote_bd_addr, p_msg);
} else {
GKI_freebuf (p_msg);
}
}
#endif
else {
//counter_add("l2cap.dyn.rx.bytes", l2cap_len);
//counter_add("l2cap.dyn.rx.pkts", 1);
if (p_ccb == NULL) {
GKI_freebuf (p_msg);
} else {
/* Basic mode packets go straight to the state machine */
if (p_ccb->peer_cfg.fcr.mode == L2CAP_FCR_BASIC_MODE) {
#if (CLASSIC_BT_INCLUDED == TRUE)
l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DATA, p_msg);
#endif ///CLASSIC_BT_INCLUDED == TRUE
} else {
/* eRTM or streaming mode, so we need to validate states first */
if ((p_ccb->chnl_state == CST_OPEN) || (p_ccb->chnl_state == CST_CONFIG)) {
#if (CLASSIC_BT_INCLUDED == TRUE)
l2c_fcr_proc_pdu (p_ccb, p_msg);
#endif ///CLASSIC_BT_INCLUDED == TRUE
} else {
GKI_freebuf (p_msg);
}
}
}
}
}