/*******************************************************************************
**
** Function RFCOMM_ConfigCnf
**
** Description This is a callback function called by L2CAP when
** L2CA_ConfigCnf received. Save L2CAP handle and dispatch
** event to the FSM.
**
*******************************************************************************/
void RFCOMM_ConfigCnf (UINT16 lcid, tL2CAP_CFG_INFO *p_cfg)
{
tRFC_MCB *p_mcb = rfc_find_lcid_mcb (lcid);
if (!p_mcb)
{
RFCOMM_TRACE_ERROR ("RFCOMM_ConfigCnf no MCB LCID:0x%x", lcid);
return;
}
rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_CONF_CNF, (void *)p_cfg);
}
/*******************************************************************************
**
** Function rfcomm_process_timeout
**
** Description The function called every second to check RFCOMM timers
**
** Returns void
**
*******************************************************************************/
void rfcomm_process_timeout (TIMER_LIST_ENT *p_tle)
{
switch (p_tle->event) {
case BTU_TTYPE_RFCOMM_MFC:
rfc_mx_sm_execute ((tRFC_MCB *)p_tle->param, RFC_EVENT_TIMEOUT, NULL);
break;
case BTU_TTYPE_RFCOMM_PORT:
rfc_port_sm_execute ((tPORT *)p_tle->param, RFC_EVENT_TIMEOUT, NULL);
break;
default:
break;
}
}
/*******************************************************************************
**
** Function RFCOMM_DisconnectInd
**
** Description This is a callback function called by L2CAP when
** L2CA_DisconnectInd received. Dispatch event to the FSM.
**
*******************************************************************************/
void RFCOMM_DisconnectInd (UINT16 lcid, BOOLEAN is_conf_needed)
{
tRFC_MCB *p_mcb = rfc_find_lcid_mcb (lcid);
if (is_conf_needed)
{
L2CA_DisconnectRsp (lcid);
}
if (!p_mcb)
{
RFCOMM_TRACE_WARNING ("RFCOMM_DisconnectInd LCID:0x%x", lcid);
return;
}
rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_DISC_IND, NULL);
}
/*******************************************************************************
**
** Function RFCOMM_ConnectInd
**
** Description This is a callback function called by L2CAP when
** L2CA_ConnectInd received. Allocate multiplexer control block
** and dispatch the event to it.
**
*******************************************************************************/
void RFCOMM_ConnectInd (BD_ADDR bd_addr, UINT16 lcid, UINT16 psm, UINT8 id)
{
tRFC_MCB *p_mcb = rfc_alloc_multiplexer_channel(bd_addr, FALSE);
UNUSED(psm);
if ((p_mcb)&&(p_mcb->state != RFC_MX_STATE_IDLE))
{
/* if this is collision case */
if ((p_mcb->is_initiator)&&(p_mcb->state == RFC_MX_STATE_WAIT_CONN_CNF))
{
p_mcb->pending_lcid = lcid;
p_mcb->pending_id = id;
/* wait random timeout (2 - 12) to resolve collision */
/* if peer gives up then local device rejects incoming connection and continues as initiator */
/* if timeout, local device disconnects outgoing connection and continues as acceptor */
RFCOMM_TRACE_DEBUG ("RFCOMM_ConnectInd start timer for collision, initiator's LCID(0x%x), acceptor's LCID(0x%x)",
p_mcb->lcid, p_mcb->pending_lcid);
rfc_timer_start(p_mcb, (UINT16)(GKI_get_tick_count()%10 + 2));
return;
}
else
{
/* we cannot accept connection request from peer at this state */
/* don't update lcid */
p_mcb = NULL;
}
}
else
{
/* store mcb even if null */
rfc_save_lcid_mcb (p_mcb, lcid);
}
if (p_mcb == NULL)
{
L2CA_ConnectRsp (bd_addr, id, lcid, L2CAP_CONN_NO_RESOURCES, 0);
return;
}
p_mcb->lcid = lcid;
rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_CONN_IND, &id);
}
/*******************************************************************************
**
** Function rfc_check_mcb_active
**
** Description Check if there are any opened ports on the MCB if not
** start MCB Inact timer.
**
** Returns void
**
*******************************************************************************/
void rfc_check_mcb_active (tRFC_MCB *p_mcb)
{
UINT16 i;
for (i = 0; i < RFCOMM_MAX_DLCI; i++) {
if (p_mcb->port_inx[i] != 0) {
p_mcb->is_disc_initiator = FALSE;
return;
}
}
/* The last port was DISCed. On the client side start disconnecting Mx */
/* On the server side start inactivity timer */
if (p_mcb->is_disc_initiator) {
p_mcb->is_disc_initiator = FALSE;
rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_CLOSE_REQ, NULL);
} else {
rfc_timer_start (p_mcb, RFC_MCB_RELEASE_INACT_TIMER);
}
}
/*******************************************************************************
**
** Function RFCOMM_StartRsp
**
** Description This function handles Start Response from the upper layer.
** Save upper layer handle and result of the Start Indication
** in the control block and dispatch event to the FSM.
**
*******************************************************************************/
void RFCOMM_StartRsp (tRFC_MCB *p_mcb, UINT16 result)
{
rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_START_RSP, &result);
}
/*******************************************************************************
**
** Function RFCOMM_StartReq
**
** Description This function handles Start Request from the upper layer.
** If RFCOMM multiplexer channel can not be allocated
** send start not accepted confirmation. Otherwise dispatch
** start event to the state machine.
**
*******************************************************************************/
void RFCOMM_StartReq (tRFC_MCB *p_mcb)
{
rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_START_REQ, NULL);
}
/*******************************************************************************
**
** Function RFCOMM_BufDataInd
**
** Description This is a callback function called by L2CAP when
** data RFCOMM frame is received. Parse the frames, check
** the checksum and dispatch event to multiplexer or port
** state machine depending on the frame destination.
**
*******************************************************************************/
void RFCOMM_BufDataInd (UINT16 lcid, BT_HDR *p_buf)
{
tRFC_MCB *p_mcb = rfc_find_lcid_mcb (lcid);
tPORT *p_port;
UINT8 event;
if (!p_mcb)
{
RFCOMM_TRACE_WARNING ("RFCOMM_BufDataInd LCID:0x%x", lcid);
GKI_freebuf (p_buf);
return;
}
event = rfc_parse_data (p_mcb, &rfc_cb.rfc.rx_frame, p_buf);
/* If the frame did not pass validation just ignore it */
if (event == RFC_EVENT_BAD_FRAME)
{
GKI_freebuf (p_buf);
return;
}
if (rfc_cb.rfc.rx_frame.dlci == RFCOMM_MX_DLCI)
{
/* Take special care of the Multiplexer Control Messages */
if (event == RFC_EVENT_UIH)
{
rfc_process_mx_message (p_mcb, p_buf);
return;
}
/* Other multiplexer events go to state machine */
rfc_mx_sm_execute (p_mcb, event, NULL);
GKI_freebuf (p_buf);
return;
}
/* The frame was received on the data channel DLCI, verify that DLC exists */
if (((p_port = port_find_mcb_dlci_port (p_mcb, rfc_cb.rfc.rx_frame.dlci)) == NULL)
|| (!p_port->rfc.p_mcb))
{
/* If this is a SABME on the new port, check if any appl is waiting for it */
if (event != RFC_EVENT_SABME)
{
if (( p_mcb->is_initiator && !rfc_cb.rfc.rx_frame.cr)
|| (!p_mcb->is_initiator && rfc_cb.rfc.rx_frame.cr))
rfc_send_dm (p_mcb, rfc_cb.rfc.rx_frame.dlci, rfc_cb.rfc.rx_frame.pf);
GKI_freebuf (p_buf);
return;
}
if ((p_port = port_find_dlci_port (rfc_cb.rfc.rx_frame.dlci)) == NULL)
{
rfc_send_dm (p_mcb, rfc_cb.rfc.rx_frame.dlci, TRUE);
GKI_freebuf (p_buf);
return;
}
p_mcb->port_inx[rfc_cb.rfc.rx_frame.dlci] = p_port->inx;
p_port->rfc.p_mcb = p_mcb;
}
if (event == RFC_EVENT_UIH)
{
if (p_buf->len > 0)
rfc_port_sm_execute (p_port, event, p_buf);
else
GKI_freebuf (p_buf);
if (rfc_cb.rfc.rx_frame.credit != 0)
rfc_inc_credit (p_port, rfc_cb.rfc.rx_frame.credit);
return;
}
rfc_port_sm_execute (p_port, event, NULL);
GKI_freebuf (p_buf);
}
/*******************************************************************************
**
** Function RFCOMM_ConnectCnf
**
** Description This is a callback function called by L2CAP when
** L2CA_ConnectCnf received. Save L2CAP handle and dispatch
** event to the FSM.
**
*******************************************************************************/
void RFCOMM_ConnectCnf (UINT16 lcid, UINT16 result)
{
tRFC_MCB *p_mcb = rfc_find_lcid_mcb (lcid);
if (!p_mcb)
{
RFCOMM_TRACE_ERROR ("RFCOMM_ConnectCnf LCID:0x%x", lcid);
return;
}
if (p_mcb->pending_lcid)
{
/* if peer rejects our connect request but peer's connect request is pending */
if (result != L2CAP_CONN_OK )
{
UINT16 i;
UINT8 idx;
RFCOMM_TRACE_DEBUG ("RFCOMM_ConnectCnf retry as acceptor on pending LCID(0x%x)", p_mcb->pending_lcid);
/* remove mcb from mapping table */
rfc_save_lcid_mcb (NULL, p_mcb->lcid);
p_mcb->lcid = p_mcb->pending_lcid;
p_mcb->is_initiator = FALSE;
p_mcb->state = RFC_MX_STATE_IDLE;
/* store mcb into mapping table */
rfc_save_lcid_mcb (p_mcb, p_mcb->lcid);
/* update direction bit */
for (i = 0; i < RFCOMM_MAX_DLCI; i += 2)
{
if ((idx = p_mcb->port_inx[i]) != 0)
{
p_mcb->port_inx[i] = 0;
p_mcb->port_inx[i+1] = idx;
rfc_cb.port.port[idx - 1].dlci += 1;
RFCOMM_TRACE_DEBUG ("RFCOMM MX - DLCI:%d -> %d", i, rfc_cb.port.port[idx - 1].dlci);
}
}
rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_CONN_IND, &(p_mcb->pending_id));
return;
}
else
{
RFCOMM_TRACE_DEBUG ("RFCOMM_ConnectCnf peer gave up pending LCID(0x%x)", p_mcb->pending_lcid);
/* Peer gave up his connection request, make sure cleaning up L2CAP channel */
L2CA_ConnectRsp (p_mcb->bd_addr, p_mcb->pending_id, p_mcb->pending_lcid, L2CAP_CONN_NO_RESOURCES, 0);
p_mcb->pending_lcid = 0;
}
}
/* Save LCID to be used in all consecutive calls to L2CAP */
p_mcb->lcid = lcid;
rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_CONN_CNF, &result);
}
/*******************************************************************************
**
** Function rfc_mx_sm_state_wait_conn_cnf
**
** Description This function handles events when the multiplexer is
** waiting for Connection Confirm from L2CAP.
**
** Returns void
**
*******************************************************************************/
void rfc_mx_sm_state_wait_conn_cnf (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
RFCOMM_TRACE_EVENT1 ("rfc_mx_sm_state_wait_conn_cnf - evt:%d", event);
switch (event)
{
case RFC_MX_EVENT_START_REQ:
RFCOMM_TRACE_ERROR2 ("Mx error state %d event %d", p_mcb->state, event);
return;
/* There is some new timing so that Config Ind comes before security is completed
so we are still waiting fo the confirmation. */
case RFC_MX_EVENT_CONF_IND:
rfc_mx_conf_ind (p_mcb, (tL2CAP_CFG_INFO *)p_data);
return;
case RFC_MX_EVENT_CONN_CNF:
if (*((UINT16 *)p_data) != L2CAP_SUCCESS)
{
p_mcb->state = RFC_MX_STATE_IDLE;
PORT_StartCnf (p_mcb, *((UINT16 *)p_data));
return;
}
p_mcb->state = RFC_MX_STATE_CONFIGURE;
rfc_mx_send_config_req (p_mcb);
return;
case RFC_MX_EVENT_DISC_IND:
p_mcb->state = RFC_MX_STATE_IDLE;
PORT_CloseInd (p_mcb);
return;
case RFC_EVENT_TIMEOUT:
p_mcb->state = RFC_MX_STATE_IDLE;
L2CA_DisconnectReq (p_mcb->lcid);
/* we gave up outgoing connection request then try peer's request */
if (p_mcb->pending_lcid)
{
UINT16 i;
UINT8 idx;
RFCOMM_TRACE_DEBUG2 ("RFCOMM MX retry as acceptor in collision case - evt:%d in state:%d", event, p_mcb->state);
rfc_save_lcid_mcb (NULL, p_mcb->lcid);
p_mcb->lcid = p_mcb->pending_lcid;
rfc_save_lcid_mcb (p_mcb, p_mcb->lcid);
p_mcb->is_initiator = FALSE;
/* update direction bit */
for (i = 0; i < RFCOMM_MAX_DLCI; i += 2)
{
if ((idx = p_mcb->port_inx[i]) != 0)
{
p_mcb->port_inx[i] = 0;
p_mcb->port_inx[i+1] = idx;
rfc_cb.port.port[idx - 1].dlci += 1;
RFCOMM_TRACE_DEBUG2 ("RFCOMM MX - DLCI:%d -> %d", i, rfc_cb.port.port[idx - 1].dlci);
}
}
rfc_mx_sm_execute (p_mcb, RFC_MX_EVENT_CONN_IND, &(p_mcb->pending_id));
}
else
{
PORT_CloseInd (p_mcb);
}
return;
}
RFCOMM_TRACE_EVENT2 ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
}