/*******************************************************************************
**
** Function rfc_mx_sm_state_connected
**
** Description This function handles events when the multiplexer is
** in the CONNECTED state
**
** Returns void
**
*******************************************************************************/
void rfc_mx_sm_state_connected (tRFC_MCB *p_mcb, UINT16 event, void *p_data)
{
RFCOMM_TRACE_EVENT1 ("rfc_mx_sm_state_connected - evt:%d", event);
switch (event)
{
case RFC_EVENT_TIMEOUT:
case RFC_MX_EVENT_CLOSE_REQ:
rfc_timer_start (p_mcb, RFC_DISC_TIMEOUT);
p_mcb->state = RFC_MX_STATE_DISC_WAIT_UA;
rfc_send_disc (p_mcb, RFCOMM_MX_DLCI);
return;
case RFC_MX_EVENT_DISC_IND:
p_mcb->state = RFC_MX_STATE_IDLE;
PORT_CloseInd (p_mcb);
return;
case RFC_EVENT_DISC:
/* Reply with UA. If initiator bring down L2CAP connection */
/* If server wait for some time if client decide to reinitiate channel */
rfc_send_ua (p_mcb, RFCOMM_MX_DLCI);
if (p_mcb->is_initiator)
{
L2CA_DisconnectReq (p_mcb->lcid);
}
/* notify all ports that connection is gone */
PORT_CloseInd (p_mcb);
return;
}
RFCOMM_TRACE_EVENT2 ("RFCOMM MX ignored - evt:%d in state:%d", event, p_mcb->state);
}
/*******************************************************************************
**
** Function rfc_port_sm_sabme_wait_ua
**
** Description This function handles events when SABME on the DLC was
** sent and SM is waiting for UA or DM.
**
** Returns void
**
*******************************************************************************/
void rfc_port_sm_sabme_wait_ua (tPORT *p_port, UINT16 event, void *p_data)
{
switch (event)
{
case RFC_EVENT_OPEN:
case RFC_EVENT_ESTABLISH_RSP:
RFCOMM_TRACE_ERROR ("Port error state %d event %d", p_port->rfc.state, event);
return;
case RFC_EVENT_CLOSE:
rfc_port_timer_start (p_port, RFC_DISC_TIMEOUT);
rfc_send_disc (p_port->rfc.p_mcb, p_port->dlci);
p_port->rfc.expected_rsp = 0;
p_port->rfc.state = RFC_STATE_DISC_WAIT_UA;
return;
case RFC_EVENT_CLEAR:
rfc_port_closed (p_port);
return;
case RFC_EVENT_DATA:
GKI_freebuf (p_data);
break;
case RFC_EVENT_UA:
rfc_port_timer_stop (p_port);
p_port->rfc.state = RFC_STATE_OPENED;
PORT_DlcEstablishCnf (p_port->rfc.p_mcb, p_port->dlci, p_port->rfc.p_mcb->peer_l2cap_mtu, RFCOMM_SUCCESS);
return;
case RFC_EVENT_DM:
p_port->rfc.p_mcb->is_disc_initiator = TRUE;
PORT_DlcEstablishCnf (p_port->rfc.p_mcb, p_port->dlci, p_port->rfc.p_mcb->peer_l2cap_mtu, RFCOMM_ERROR);
rfc_port_closed (p_port);
return;
case RFC_EVENT_DISC:
rfc_send_ua (p_port->rfc.p_mcb, p_port->dlci);
PORT_DlcEstablishCnf (p_port->rfc.p_mcb, p_port->dlci, p_port->rfc.p_mcb->peer_l2cap_mtu, RFCOMM_ERROR);
rfc_port_closed (p_port);
return;
case RFC_EVENT_SABME:
/* Continue to wait for the UA the SABME this side sent */
rfc_send_ua (p_port->rfc.p_mcb, p_port->dlci);
return;
case RFC_EVENT_UIH:
GKI_freebuf (p_data);
return;
case RFC_EVENT_TIMEOUT:
p_port->rfc.state = RFC_STATE_CLOSED;
PORT_DlcEstablishCnf (p_port->rfc.p_mcb, p_port->dlci, p_port->rfc.p_mcb->peer_l2cap_mtu, RFCOMM_ERROR);
return;
}
RFCOMM_TRACE_WARNING ("Port state sabme_wait_ua Event ignored %d", event);
}
/*******************************************************************************
**
** Function PORT_ParNegCnf
**
** Description This function is called from the RFCOMM layer to change
** DLCI parameters (currently only MTU is negotiated).
** Save the MTU size supported by the peer.
** If the confirmation is received during the port opening
** procedure send EstablishRequest to continue.
**
*******************************************************************************/
void PORT_ParNegCnf (tRFC_MCB *p_mcb, UINT8 dlci, UINT16 mtu, UINT8 cl, UINT8 k)
{
tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
RFCOMM_TRACE_EVENT ("PORT_ParNegCnf dlci:%d mtu:%d cl: %d k: %d", dlci, mtu, cl, k);
if (!p_port)
return;
/* Flow control mechanism not set yet. Negotiate flow control mechanism. */
if (p_mcb->flow == PORT_FC_UNDEFINED)
{
/* Our stack is configured for TS07.10 and they responded with credit-based. */
/* This is illegal-- negotiation fails. */
if ((PORT_FC_DEFAULT == PORT_FC_TS710) && (cl == RFCOMM_PN_CONV_LAYER_CBFC_R))
{
rfc_send_disc (p_mcb, p_port->dlci);
rfc_port_closed (p_port);
return;
}
/* Our stack is configured for credit-based and they responded with credit-based. */
else if (cl == RFCOMM_PN_CONV_LAYER_CBFC_R)
{
p_mcb->flow = PORT_FC_CREDIT;
}
/* They responded with any other value. Treat this as negotiation to TS07.10. */
else
{
p_mcb->flow = PORT_FC_TS710;
}
}
/* If mux flow control mechanism set, we honor that setting regardless of */
/* the CL value in their response. This allows us to gracefully accept any */
/* illegal PN negotiation scenarios. */
p_port->mtu = (p_port->mtu < mtu) ? p_port->mtu : mtu;
p_port->peer_mtu = p_port->mtu;
if (p_mcb->flow == PORT_FC_CREDIT)
{
port_get_credits (p_port, k);
}
if (p_port->state == PORT_STATE_OPENING)
RFCOMM_DlcEstablishReq (p_mcb, p_port->dlci, p_port->mtu);
}
/*******************************************************************************
**
** Function rfc_port_sm_opened
**
** Description This function handles events for the port in the OPENED
** state
**
** Returns void
**
*******************************************************************************/
void rfc_port_sm_opened (tPORT *p_port, UINT16 event, void *p_data)
{
switch (event) {
case RFC_EVENT_OPEN:
RFCOMM_TRACE_ERROR ("Port error state %d event %d", p_port->rfc.state, event);
return;
case RFC_EVENT_CLOSE:
rfc_port_timer_start (p_port, RFC_DISC_TIMEOUT);
rfc_send_disc (p_port->rfc.p_mcb, p_port->dlci);
p_port->rfc.expected_rsp = 0;
p_port->rfc.state = RFC_STATE_DISC_WAIT_UA;
return;
case RFC_EVENT_CLEAR:
rfc_port_closed (p_port);
return;
case RFC_EVENT_DATA:
/* Send credits in the frame. Pass them in the layer specific member of the hdr. */
/* There might be an initial case when we reduced rx_max and credit_rx is still */
/* bigger. Make sure that we do not send 255 */
if ((p_port->rfc.p_mcb->flow == PORT_FC_CREDIT)
&& (((BT_HDR *)p_data)->len < p_port->peer_mtu)
&& (!p_port->rx.user_fc)
&& (p_port->credit_rx_max > p_port->credit_rx)) {
((BT_HDR *)p_data)->layer_specific = (UINT8) (p_port->credit_rx_max - p_port->credit_rx);
p_port->credit_rx = p_port->credit_rx_max;
} else {
((BT_HDR *)p_data)->layer_specific = 0;
}
rfc_send_buf_uih (p_port->rfc.p_mcb, p_port->dlci, (BT_HDR *)p_data);
rfc_dec_credit (p_port);
return;
case RFC_EVENT_UA:
return;
case RFC_EVENT_SABME:
rfc_send_ua (p_port->rfc.p_mcb, p_port->dlci);
return;
case RFC_EVENT_DM:
PORT_DlcReleaseInd (p_port->rfc.p_mcb, p_port->dlci);
rfc_port_closed (p_port);
return;
case RFC_EVENT_DISC:
p_port->rfc.state = RFC_STATE_CLOSED;
rfc_send_ua (p_port->rfc.p_mcb, p_port->dlci);
if (! fixed_queue_is_empty(p_port->rx.queue)) {
/* give a chance to upper stack to close port properly */
RFCOMM_TRACE_DEBUG("port queue is not empty");
rfc_port_timer_start (p_port, RFC_DISC_TIMEOUT);
} else {
PORT_DlcReleaseInd (p_port->rfc.p_mcb, p_port->dlci);
}
return;
case RFC_EVENT_UIH:
rfc_port_uplink_data (p_port, (BT_HDR *)p_data);
return;
case RFC_EVENT_TIMEOUT:
Port_TimeOutCloseMux( p_port->rfc.p_mcb ) ;
RFCOMM_TRACE_ERROR ("Port error state %d event %d", p_port->rfc.state, event);
return;
}
RFCOMM_TRACE_WARNING ("Port state opened Event ignored %d", event);
}