/*******************************************************************************
**
** Function rfc_mx_sm_state_idle
**
** Description This function handles events when the multiplexer is in
** IDLE state. This state exists when connection is being
** initially established.
**
** Returns void
**
*******************************************************************************/
void rfc_mx_sm_state_idle (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
RFCOMM_TRACE_EVENT1 ("rfc_mx_sm_state_idle - evt:%d", event);
switch (event)
{
case RFC_MX_EVENT_START_REQ:
/* Initialize L2CAP MTU */
p_mcb->peer_l2cap_mtu = L2CAP_DEFAULT_MTU - RFCOMM_MIN_OFFSET - 1;
if ((p_mcb->lcid = L2CA_ConnectReq (BT_PSM_RFCOMM, p_mcb->bd_addr)) == 0)
{
PORT_StartCnf (p_mcb, RFCOMM_ERROR);
return;
}
/* Save entry for quicker access to mcb based on the LCID */
rfc_save_lcid_mcb (p_mcb, p_mcb->lcid);
p_mcb->state = RFC_MX_STATE_WAIT_CONN_CNF;
return;
case RFC_MX_EVENT_START_RSP:
case RFC_MX_EVENT_CONN_CNF:
case RFC_MX_EVENT_CONF_IND:
case RFC_MX_EVENT_CONF_CNF:
RFCOMM_TRACE_ERROR2 ("Mx error state %d event %d", p_mcb->state, event);
return;
case RFC_MX_EVENT_CONN_IND:
rfc_timer_start (p_mcb, RFCOMM_CONN_TIMEOUT);
L2CA_ConnectRsp (p_mcb->bd_addr, *((UINT8 *)p_data), p_mcb->lcid, L2CAP_CONN_OK, 0);
rfc_mx_send_config_req (p_mcb);
p_mcb->state = RFC_MX_STATE_CONFIGURE;
return;
case RFC_EVENT_SABME:
break;
case RFC_EVENT_UA:
case RFC_EVENT_DM:
return;
case RFC_EVENT_DISC:
rfc_send_dm (p_mcb, RFCOMM_MX_DLCI, TRUE);
return;
case RFC_EVENT_UIH:
rfc_send_dm (p_mcb, RFCOMM_MX_DLCI, FALSE);
return;
}
RFCOMM_TRACE_EVENT2 ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
}
/*******************************************************************************
**
** 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 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_disc_wait_ua
**
** Description This function handles events when the multiplexer sent
** DISC and is waiting for UA reply.
**
** Returns void
**
*******************************************************************************/
void rfc_mx_sm_state_disc_wait_ua (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
BT_HDR *p_buf;
RFCOMM_TRACE_EVENT1 ("rfc_mx_sm_state_disc_wait_ua - evt:%d", event);
switch (event)
{
case RFC_EVENT_UA:
case RFC_EVENT_DM:
case RFC_EVENT_TIMEOUT:
L2CA_DisconnectReq (p_mcb->lcid);
if (p_mcb->restart_required)
{
/* Start Request was received while disconnecting. Execute it again */
if ((p_mcb->lcid = L2CA_ConnectReq (BT_PSM_RFCOMM, p_mcb->bd_addr)) == 0)
{
PORT_StartCnf (p_mcb, RFCOMM_ERROR);
return;
}
/* Save entry for quicker access to mcb based on the LCID */
rfc_save_lcid_mcb (p_mcb, p_mcb->lcid);
/* clean up before reuse it */
while ((p_buf = (BT_HDR *)GKI_dequeue(&p_mcb->cmd_q)) != NULL)
GKI_freebuf(p_buf);
rfc_timer_start (p_mcb, RFC_MCB_INIT_INACT_TIMER);
p_mcb->is_initiator = TRUE;
p_mcb->restart_required = FALSE;
p_mcb->local_cfg_sent = FALSE;
p_mcb->peer_cfg_rcvd = FALSE;
p_mcb->state = RFC_MX_STATE_WAIT_CONN_CNF;
return;
}
rfc_release_multiplexer_channel (p_mcb);
return;
case RFC_EVENT_DISC:
rfc_send_ua (p_mcb, RFCOMM_MX_DLCI);
return;
case RFC_EVENT_UIH:
GKI_freebuf (p_data);
rfc_send_dm (p_mcb, RFCOMM_MX_DLCI, FALSE);
return;
case RFC_MX_EVENT_START_REQ:
p_mcb->restart_required = TRUE;
return;
case RFC_MX_EVENT_DISC_IND:
p_mcb->state = RFC_MX_STATE_IDLE;
PORT_CloseInd (p_mcb);
return;
case RFC_MX_EVENT_CLOSE_REQ:
return;
case RFC_MX_EVENT_QOS_VIOLATION_IND:
break;
}
RFCOMM_TRACE_EVENT2 ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
}
/*******************************************************************************
**
** 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);
}