blob: aaad62ab898dcec8aca98960f53b835eab30d8b6 [file] [log] [blame]
/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This module contains functions for port emulation entity and RFCOMM
* communications
*
******************************************************************************/
#include <string.h>
#include "osi/include/mutex.h"
#include "bt_common.h"
#include "bt_target.h"
#include "bt_utils.h"
#include "btm_api.h"
#include "btm_int.h"
#include "port_api.h"
#include "port_int.h"
#include "rfc_int.h"
#include "rfcdefs.h"
/*
** Local function definitions
*/
UINT32 port_rfc_send_tx_data (tPORT *p_port);
void port_rfc_closed (tPORT *p_port, UINT8 res);
void port_get_credits (tPORT *p_port, UINT8 k);
/*******************************************************************************
**
** Function port_open_continue
**
** Description This function is called after security manager completes
** required security checks.
**
** Returns void
**
*******************************************************************************/
int port_open_continue (tPORT *p_port)
{
tRFC_MCB *p_mcb;
RFCOMM_TRACE_EVENT ("port_open_continue, p_port:%p", p_port);
/* Check if multiplexer channel has already been established */
if ((p_mcb = rfc_alloc_multiplexer_channel (p_port->bd_addr, TRUE)) == NULL)
{
RFCOMM_TRACE_WARNING ("port_open_continue no mx channel");
port_release_port (p_port);
return (PORT_NO_RESOURCES);
}
p_port->rfc.p_mcb = p_mcb;
p_mcb->port_inx[p_port->dlci] = p_port->inx;
/* Connection is up and we know local and remote features, select MTU */
port_select_mtu (p_port);
if (p_mcb->state == RFC_MX_STATE_CONNECTED)
{
RFCOMM_ParNegReq (p_mcb, p_port->dlci, p_port->mtu);
}
else if ((p_mcb->state == RFC_MX_STATE_IDLE)
||(p_mcb->state == RFC_MX_STATE_DISC_WAIT_UA))
{
/* In RFC_MX_STATE_IDLE state, MX state machine will create connection */
/* In RFC_MX_STATE_DISC_WAIT_UA state, MX state machine will recreate connection */
/* after disconnecting is completed */
RFCOMM_StartReq (p_mcb);
}
else
{
/* MX state machine ignores RFC_MX_EVENT_START_REQ in these states */
/* When it enters RFC_MX_STATE_CONNECTED, it will check any openning ports */
RFCOMM_TRACE_DEBUG ("port_open_continue: mx state(%d) mx channel is openning", p_mcb->state);
}
return (PORT_SUCCESS);
}
/*******************************************************************************
**
** Function port_start_control
**
** Description This function is called in the BTU_TASK context to
** send control information
**
** Returns void
**
*******************************************************************************/
void port_start_control (tPORT *p_port)
{
tRFC_MCB *p_mcb = p_port->rfc.p_mcb;
if (p_mcb == NULL)
return;
RFCOMM_ControlReq (p_mcb, p_port->dlci, &p_port->local_ctrl);
}
/*******************************************************************************
**
** Function port_start_par_neg
**
** Description This function is called in the BTU_TASK context to
** send configuration information
**
** Returns void
**
*******************************************************************************/
void port_start_par_neg (tPORT *p_port)
{
tRFC_MCB *p_mcb = p_port->rfc.p_mcb;
if (p_mcb == NULL)
return;
RFCOMM_PortNegReq (p_mcb, p_port->dlci, &p_port->user_port_pars);
}
/*******************************************************************************
**
** Function port_start_close
**
** Description This function is called in the BTU_TASK context to
** release DLC
**
** Returns void
**
*******************************************************************************/
void port_start_close (tPORT *p_port)
{
tRFC_MCB *p_mcb = p_port->rfc.p_mcb;
UINT8 old_signals;
UINT32 events = 0;
/* At first indicate to the user that signals on the connection were dropped */
p_port->line_status |= LINE_STATUS_FAILED;
old_signals = p_port->peer_ctrl.modem_signal;
p_port->peer_ctrl.modem_signal &= ~(PORT_DTRDSR_ON | PORT_CTSRTS_ON | PORT_DCD_ON);
events |= port_get_signal_changes (p_port, old_signals, p_port->peer_ctrl.modem_signal);
if(p_port->ev_mask & PORT_EV_CONNECT_ERR)
events |= PORT_EV_CONNECT_ERR;
if(p_port->ev_mask & PORT_EV_ERR)
events |= PORT_EV_ERR;
if ((p_port->p_callback != NULL) && events)
p_port->p_callback (events, p_port->inx);
/* Check if RFCOMM side has been closed while the message was queued */
if ((p_mcb == NULL) || (p_port->rfc.state == RFC_STATE_CLOSED))
{
/* Call management callback function before calling port_release_port() to clear tPort */
if (p_port->p_mgmt_callback)
p_port->p_mgmt_callback (PORT_CLOSED, p_port->inx);
port_release_port (p_port);
}
else
{
RFCOMM_DlcReleaseReq (p_mcb, p_port->dlci);
}
}
/*******************************************************************************
**
** Function PORT_StartCnf
**
** Description This function is called from the RFCOMM layer when
** establishing of the multiplexer channel is completed.
** Continue establishing of the connection for all ports that
** are in the OPENING state
**
*******************************************************************************/
void PORT_StartCnf (tRFC_MCB *p_mcb, UINT16 result)
{
tPORT *p_port;
int i;
BOOLEAN no_ports_up = TRUE;
RFCOMM_TRACE_EVENT ("PORT_StartCnf result:%d", result);
p_port = &rfc_cb.port.port[0];
for (i = 0; i < MAX_RFC_PORTS; i++, p_port++)
{
if (p_port->rfc.p_mcb == p_mcb)
{
no_ports_up = FALSE;
if (result == RFCOMM_SUCCESS)
RFCOMM_ParNegReq (p_mcb, p_port->dlci, p_port->mtu);
else
{
RFCOMM_TRACE_WARNING ("PORT_StartCnf failed result:%d", result);
/* Warning: result is also set to 4 when l2cap connection
fails due to l2cap connect cnf (no_resources) */
if( result == HCI_ERR_PAGE_TIMEOUT )
p_port->error = PORT_PAGE_TIMEOUT;
else
p_port->error = PORT_START_FAILED;
rfc_release_multiplexer_channel (p_mcb);
/* Send event to the application */
if (p_port->p_callback && (p_port->ev_mask & PORT_EV_CONNECT_ERR))
(p_port->p_callback)(PORT_EV_CONNECT_ERR, p_port->inx);
if (p_port->p_mgmt_callback)
p_port->p_mgmt_callback (PORT_START_FAILED, p_port->inx);
port_release_port (p_port);
}
}
}
/* There can be a situation when after starting connection, user closes the */
/* port, we can catch it here to close multiplexor channel */
if (no_ports_up)
{
rfc_check_mcb_active (p_mcb);
}
}
/*******************************************************************************
**
** Function PORT_StartInd
**
** Description This function is called from the RFCOMM layer when
** some peer device wants to establish a multiplexer
** connection. Check if there are any ports open with this
** or not assigned multiplexer.
**
*******************************************************************************/
void PORT_StartInd (tRFC_MCB *p_mcb)
{
tPORT *p_port;
int i;
RFCOMM_TRACE_EVENT ("PORT_StartInd");
p_port = &rfc_cb.port.port[0];
for (i = 0; i < MAX_RFC_PORTS; i++, p_port++)
{
if ((p_port->rfc.p_mcb == NULL)
|| (p_port->rfc.p_mcb == p_mcb))
{
RFCOMM_TRACE_DEBUG("PORT_StartInd, RFCOMM_StartRsp RFCOMM_SUCCESS: p_mcb:%p", p_mcb);
RFCOMM_StartRsp (p_mcb, RFCOMM_SUCCESS);
return;
}
}
RFCOMM_StartRsp (p_mcb, RFCOMM_ERROR);
}
/*******************************************************************************
**
** Function PORT_ParNegInd
**
** Description This function is called from the RFCOMM layer to change
** DLCI parameters (currently only MTU is negotiated).
** If can not find the port do not accept the request.
** Otherwise save the MTU size supported by the peer.
**
*******************************************************************************/
void PORT_ParNegInd (tRFC_MCB *p_mcb, UINT8 dlci, UINT16 mtu, UINT8 cl, UINT8 k)
{
tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
UINT8 our_cl;
UINT8 our_k;
RFCOMM_TRACE_EVENT ("PORT_ParNegInd dlci:%d mtu:%d", dlci, mtu);
if (!p_port)
{
/* This can be a first request for this port */
p_port = port_find_dlci_port (dlci);
if (!p_port)
{
/* If the port cannot be opened, send a DM. Per Errata 1205 */
rfc_send_dm(p_mcb, dlci, FALSE);
/* check if this is the last port open, some headsets have
problem, they don't disconnect if we send DM */
rfc_check_mcb_active( p_mcb );
RFCOMM_TRACE_EVENT( "PORT_ParNegInd: port not found" );
return;
}
p_mcb->port_inx[dlci] = p_port->inx;
}
memcpy (p_port->bd_addr, p_mcb->bd_addr, BD_ADDR_LEN);
/* Connection is up and we know local and remote features, select MTU */
port_select_mtu (p_port);
p_port->rfc.p_mcb = p_mcb;
p_port->mtu = (p_port->mtu < mtu) ? p_port->mtu : mtu;
p_port->peer_mtu = p_port->mtu;
/* Negotiate the flow control mechanism. If flow control mechanism for */
/* mux has not been set yet, set it now. If either we or peer wants TS 07.10, */
/* use that. Otherwise both must want credit based, so use that. If flow is */
/* already defined for this mux, we respond with that value. */
if (p_mcb->flow == PORT_FC_UNDEFINED)
{
if ((PORT_FC_DEFAULT == PORT_FC_TS710) || (cl == RFCOMM_PN_CONV_LAYER_TYPE_1))
{
p_mcb->flow = PORT_FC_TS710;
}
else
{
p_mcb->flow = PORT_FC_CREDIT;
}
}
/* Regardless of our flow control mechanism, if the PN cl is zero, we must */
/* respond with zero. "A responding implementation must set this field to 14 */
/* if (and only if) the PN request was 15." This could happen if a PN is sent */
/* after the DLCI is already established-- the PN in that case must have cl = 0. */
/* See RFCOMM spec 5.5.3 */
if (cl == RFCOMM_PN_CONV_LAYER_TYPE_1)
{
our_cl = RFCOMM_PN_CONV_LAYER_TYPE_1;
our_k = 0;
}
else if (p_mcb->flow == PORT_FC_CREDIT)
{
/* get credits */
port_get_credits (p_port, k);
/* Set convergence layer and number of credits (k) */
our_cl = RFCOMM_PN_CONV_LAYER_CBFC_R;
our_k = (p_port->credit_rx_max < RFCOMM_K_MAX) ? p_port->credit_rx_max : RFCOMM_K_MAX;
p_port->credit_rx = our_k;
}
else
{
/* must not be using credit based flow control; use TS 7.10 */
our_cl = RFCOMM_PN_CONV_LAYER_TYPE_1;
our_k = 0;
}
RFCOMM_ParNegRsp (p_mcb, dlci, p_port->mtu, our_cl, our_k);
}
/*******************************************************************************
**
** 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 PORT_DlcEstablishInd
**
** Description This function is called from the RFCOMM layer when peer
** device wants to establish a new DLC. If this is not the
** first message in the establishment procedure port_handle
** has a handle to the port control block otherwise the control
** block should be found based on the muliplexer channel and
** dlci. The block should be allocated allocated before
** meaning that application already made open.
**
*******************************************************************************/
void PORT_DlcEstablishInd (tRFC_MCB *p_mcb, UINT8 dlci, UINT16 mtu)
{
tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
RFCOMM_TRACE_DEBUG ("PORT_DlcEstablishInd p_mcb:%p, dlci:%d mtu:%di, p_port:%p", p_mcb, dlci, mtu, p_port);
RFCOMM_TRACE_DEBUG ("PORT_DlcEstablishInd p_mcb addr:%02x:%02x:%02x:%02x:%02x:%02x",
p_mcb->bd_addr[0], p_mcb->bd_addr[1], p_mcb->bd_addr[2],
p_mcb->bd_addr[3], p_mcb->bd_addr[4], p_mcb->bd_addr[5]);
if (!p_port)
{
/* This can be a first request for this port */
p_port = port_find_dlci_port (dlci);
if (!p_port)
{
RFCOMM_DlcEstablishRsp (p_mcb, dlci, 0, RFCOMM_ERROR);
return;
}
p_mcb->port_inx[dlci] = p_port->inx;
}
/* If L2CAP's mtu less then RFCOMM's take it */
if (mtu && (mtu < p_port->peer_mtu))
p_port->peer_mtu = mtu;
/* If there was an inactivity timer running for MCB stop it */
rfc_timer_stop (p_mcb);
RFCOMM_DlcEstablishRsp (p_mcb, dlci, p_port->mtu, RFCOMM_SUCCESS);
/* This is the server side. If application wants to know when connection */
/* is established, thats the place */
if (p_port->p_callback && (p_port->ev_mask & PORT_EV_CONNECTED))
(p_port->p_callback)(PORT_EV_CONNECTED, p_port->inx);
if (p_port->p_mgmt_callback)
p_port->p_mgmt_callback (PORT_SUCCESS, p_port->inx);
p_port->state = PORT_STATE_OPENED;
}
/*******************************************************************************
**
** Function PORT_DlcEstablishCnf
**
** Description This function is called from the RFCOMM layer when peer
** acknowledges establish procedure (SABME/UA). Send reply
** to the user and set state to OPENED if result was
** successfull.
**
*******************************************************************************/
void PORT_DlcEstablishCnf (tRFC_MCB *p_mcb, UINT8 dlci, UINT16 mtu, UINT16 result)
{
tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
RFCOMM_TRACE_EVENT ("PORT_DlcEstablishCnf dlci:%d mtu:%d result:%d", dlci, mtu, result);
if (!p_port)
return;
if (result != RFCOMM_SUCCESS)
{
p_port->error = PORT_START_FAILED;
port_rfc_closed (p_port, PORT_START_FAILED);
return;
}
/* If L2CAP's mtu less then RFCOMM's take it */
if (mtu && (mtu < p_port->peer_mtu))
p_port->peer_mtu = mtu;
/* If there was an inactivity timer running for MCB stop it */
rfc_timer_stop (p_mcb);
if (p_port->p_callback && (p_port->ev_mask & PORT_EV_CONNECTED))
(p_port->p_callback)(PORT_EV_CONNECTED, p_port->inx);
if (p_port->p_mgmt_callback)
p_port->p_mgmt_callback (PORT_SUCCESS, p_port->inx);
p_port->state = PORT_STATE_OPENED;
/* RPN is required only if we want to tell DTE how the port should be opened */
if ((p_port->uuid == UUID_SERVCLASS_DIALUP_NETWORKING)
|| (p_port->uuid == UUID_SERVCLASS_FAX))
RFCOMM_PortNegReq (p_port->rfc.p_mcb, p_port->dlci, NULL);
else
RFCOMM_ControlReq (p_port->rfc.p_mcb, p_port->dlci, &p_port->local_ctrl);
}
/*******************************************************************************
**
** Function PORT_PortNegInd
**
** Description This function is called from the RFCOMM layer when peer
** device wants to set parameters of the port. As per the spec
** this message has to be sent before the first data packet
** and can be sent before establish. The block should be
** allocated before meaning that application already made open.
**
*******************************************************************************/
void PORT_PortNegInd (tRFC_MCB *p_mcb, UINT8 dlci, tPORT_STATE *p_pars,
UINT16 param_mask)
{
tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
RFCOMM_TRACE_EVENT ("PORT_PortNegInd");
if (!p_port)
{
/* This can be a first request for this port */
p_port = port_find_dlci_port (dlci);
if (!p_port)
{
RFCOMM_PortNegRsp (p_mcb, dlci, p_pars, 0);
return;
}
p_mcb->port_inx[dlci] = p_port->inx;
}
/* Check if the flow control is acceptable on local side */
p_port->peer_port_pars = *p_pars;
RFCOMM_PortNegRsp (p_mcb, dlci, p_pars, param_mask);
}
/*******************************************************************************
**
** Function PORT_PortNegCnf
**
** Description This function is called from the RFCOMM layer to change
** state for the port. Propagate change to the user.
**
*******************************************************************************/
void PORT_PortNegCnf (tRFC_MCB *p_mcb, UINT8 dlci, tPORT_STATE *p_pars, UINT16 result)
{
tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
UNUSED(p_pars);
RFCOMM_TRACE_EVENT ("PORT_PortNegCnf");
if (!p_port)
{
RFCOMM_TRACE_WARNING ("PORT_PortNegCnf no port");
return;
}
/* Port negotiation failed. Drop the connection */
if (result != RFCOMM_SUCCESS)
{
p_port->error = PORT_PORT_NEG_FAILED;
RFCOMM_DlcReleaseReq (p_mcb, p_port->dlci);
port_rfc_closed (p_port, PORT_PORT_NEG_FAILED);
return;
}
if (!(p_port->port_ctrl & PORT_CTRL_REQ_SENT))
{
RFCOMM_ControlReq (p_port->rfc.p_mcb, p_port->dlci, &p_port->local_ctrl);
}
else
{
RFCOMM_TRACE_WARNING ("PORT_PortNegCnf Control Already sent");
}
}
/*******************************************************************************
**
** Function PORT_ControlInd
**
** Description This function is called from the RFCOMM layer on the modem
** signal change. Propagate change to the user.
**
*******************************************************************************/
void PORT_ControlInd (tRFC_MCB *p_mcb, UINT8 dlci, tPORT_CTRL *p_pars)
{
tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
UINT32 event;
UINT8 old_signals;
RFCOMM_TRACE_EVENT ("PORT_ControlInd");
if (!p_port)
return;
old_signals = p_port->peer_ctrl.modem_signal;
event = port_get_signal_changes (p_port, old_signals, p_pars->modem_signal);
p_port->peer_ctrl = *p_pars;
if (!(p_port->port_ctrl & PORT_CTRL_REQ_SENT))
RFCOMM_ControlReq (p_port->rfc.p_mcb, p_port->dlci, &p_port->local_ctrl);
else
{
/* If this is the first time we received control RFCOMM is connected */
if (!(p_port->port_ctrl & PORT_CTRL_IND_RECEIVED))
{
event |= (PORT_EV_CONNECTED & p_port->ev_mask);
}
if (p_port->port_ctrl & PORT_CTRL_REQ_CONFIRMED)
{
event |= port_rfc_send_tx_data(p_port);
}
}
p_port->port_ctrl |= (PORT_CTRL_IND_RECEIVED | PORT_CTRL_IND_RESPONDED);
if (p_pars->break_signal)
event |= (PORT_EV_BREAK & p_port->ev_mask);
/* execute call back function only if the application is registered for events */
if (event && p_port->p_callback)
(p_port->p_callback)(event, p_port->inx);
RFCOMM_TRACE_EVENT ("PORT_ControlInd DTR_DSR : %d, RTS_CTS : %d, RI : %d, DCD : %d",
((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_DTRDSR) ? 1 : 0),
((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_RTSCTS) ? 1 : 0),
((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_RI) ? 1 : 0),
((p_port->peer_ctrl.modem_signal & MODEM_SIGNAL_DCD) ? 1 : 0));
}
/*******************************************************************************
**
** Function PORT_ControlCnf
**
** Description This function is called from the RFCOMM layer when
** peer acknowleges change of the modem signals.
**
*******************************************************************************/
void PORT_ControlCnf (tRFC_MCB *p_mcb, UINT8 dlci, tPORT_CTRL *p_pars)
{
tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
UINT32 event = 0;
UNUSED(p_pars);
RFCOMM_TRACE_EVENT ("PORT_ControlCnf");
if (!p_port)
return;
if (!(p_port->port_ctrl & PORT_CTRL_REQ_CONFIRMED))
{
p_port->port_ctrl |= PORT_CTRL_REQ_CONFIRMED;
if (p_port->port_ctrl & PORT_CTRL_IND_RECEIVED)
event = (p_port->ev_mask & PORT_EV_CONNECTED);
}
if (p_port->port_ctrl & PORT_CTRL_IND_RECEIVED)
{
event |= port_rfc_send_tx_data(p_port);
}
/* execute call back function only if the application is registered for events */
if (event && p_port->p_callback)
(p_port->p_callback)(event, p_port->inx);
}
/*******************************************************************************
**
** Function PORT_LineStatusInd
**
** Description This function is called from the RFCOMM layer when
** peer indicates change in the line status
**
*******************************************************************************/
void PORT_LineStatusInd (tRFC_MCB *p_mcb, UINT8 dlci, UINT8 line_status)
{
tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
UINT32 event = 0;
RFCOMM_TRACE_EVENT ("PORT_LineStatusInd");
if (!p_port)
return;
p_port->line_status |= line_status;
if (line_status & PORT_ERR_OVERRUN)
event |= PORT_EV_OVERRUN;
if (line_status & PORT_ERR_BREAK)
event |= PORT_EV_BREAK;
if (line_status & ~(PORT_ERR_OVERRUN | PORT_ERR_BREAK))
event |= PORT_EV_ERR;
if ((p_port->p_callback != NULL) && (p_port->ev_mask & event))
p_port->p_callback ((p_port->ev_mask & event), p_port->inx);
}
/*******************************************************************************
**
** Function PORT_DlcReleaseInd
**
** Description This function is called from the RFCOMM layer when
** DLC connection is released.
**
*******************************************************************************/
void PORT_DlcReleaseInd (tRFC_MCB *p_mcb, UINT8 dlci)
{
tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
RFCOMM_TRACE_EVENT ("PORT_DlcReleaseInd");
if (!p_port)
return;
port_rfc_closed (p_port, PORT_CLOSED);
}
/*******************************************************************************
**
** Function PORT_CloseInd
**
** Description This function is called from the RFCOMM layer when
** multiplexer connection is released.
**
*******************************************************************************/
void PORT_CloseInd (tRFC_MCB *p_mcb)
{
tPORT *p_port;
int i;
RFCOMM_TRACE_EVENT ("PORT_CloseInd");
p_port = &rfc_cb.port.port[0];
for (i = 0; i < MAX_RFC_PORTS; i++, p_port++)
{
if (p_port->rfc.p_mcb == p_mcb)
{
port_rfc_closed (p_port, PORT_PEER_CONNECTION_FAILED);
}
}
rfc_release_multiplexer_channel (p_mcb);
}
/*******************************************************************************
**
** Function Port_TimeOutCloseMux
**
** Description This function is called when RFCOMM timesout on a command
** as a result multiplexer connection is closed.
**
*******************************************************************************/
void Port_TimeOutCloseMux (tRFC_MCB *p_mcb)
{
tPORT *p_port;
int i;
RFCOMM_TRACE_EVENT ("Port_TimeOutCloseMux");
p_port = &rfc_cb.port.port[0];
for (i = 0; i < MAX_RFC_PORTS; i++, p_port++)
{
if (p_port->rfc.p_mcb == p_mcb)
{
port_rfc_closed (p_port, PORT_PEER_TIMEOUT);
}
}
}
/*******************************************************************************
**
** Function PORT_DataInd
**
** Description This function is called from the RFCOMM layer when data
** buffer is received from the peer.
**
*******************************************************************************/
void PORT_DataInd (tRFC_MCB *p_mcb, UINT8 dlci, BT_HDR *p_buf)
{
tPORT *p_port = port_find_mcb_dlci_port (p_mcb, dlci);
UINT8 rx_char1;
UINT32 events = 0;
UINT8 *p;
int i;
RFCOMM_TRACE_EVENT("PORT_DataInd with data length %d, p_mcb:%p,p_port:%p,dlci:%d",
p_buf->len, p_mcb, p_port, dlci);
if (!p_port)
{
osi_free(p_buf);
return;
}
/* If client registered callout callback with flow control we can just deliver receive data */
if (p_port->p_data_co_callback)
{
/* Another packet is delivered to user. Send credits to peer if required */
if(p_port->p_data_co_callback(p_port->inx, (UINT8*)p_buf, -1, DATA_CO_CALLBACK_TYPE_INCOMING))
port_flow_control_peer(p_port, TRUE, 1);
else port_flow_control_peer(p_port, FALSE, 0);
//osi_free(p_buf);
return;
}
else RFCOMM_TRACE_ERROR("PORT_DataInd, p_port:%p, p_data_co_callback is null", p_port);
/* If client registered callback we can just deliver receive data */
if (p_port->p_data_callback)
{
/* Another packet is delivered to user. Send credits to peer if required */
port_flow_control_peer(p_port, TRUE, 1);
p_port->p_data_callback (p_port->inx, (UINT8 *)(p_buf + 1) + p_buf->offset, p_buf->len);
osi_free(p_buf);
return;
}
/* Check if rx queue exceeds the limit */
if ((p_port->rx.queue_size + p_buf->len > PORT_RX_CRITICAL_WM)
|| (fixed_queue_length(p_port->rx.queue) + 1 > p_port->rx_buf_critical))
{
RFCOMM_TRACE_EVENT ("PORT_DataInd. Buffer over run. Dropping the buffer");
osi_free(p_buf);
RFCOMM_LineStatusReq (p_mcb, dlci, LINE_STATUS_OVERRUN);
return;
}
/* If user registered to receive notification when a particular byte is */
/* received we mast check all received bytes */
if (((rx_char1 = p_port->user_port_pars.rx_char1) != 0)
&& (p_port->ev_mask & PORT_EV_RXFLAG))
{
for (i = 0, p = (UINT8 *)(p_buf + 1) + p_buf->offset; i < p_buf->len; i++)
{
if (*p++ == rx_char1)
{
events |= PORT_EV_RXFLAG;
break;
}
}
}
mutex_global_lock();
fixed_queue_enqueue(p_port->rx.queue, p_buf);
p_port->rx.queue_size += p_buf->len;
mutex_global_unlock();
/* perform flow control procedures if necessary */
port_flow_control_peer(p_port, FALSE, 0);
/* If user indicated flow control can not deliver any notifications to him */
if (p_port->rx.user_fc)
{
if (events & PORT_EV_RXFLAG)
p_port->rx_flag_ev_pending = TRUE;
return;
}
events |= PORT_EV_RXCHAR;
/* Mask out all events that are not of interest to user */
events &= p_port->ev_mask;
if (p_port->p_callback && events)
p_port->p_callback (events, p_port->inx);
}
/*******************************************************************************
**
** Function PORT_FlowInd
**
** Description This function is called from the RFCOMM layer on the flow
** control signal change. Propagate change to the user.
**
*******************************************************************************/
void PORT_FlowInd (tRFC_MCB *p_mcb, UINT8 dlci, BOOLEAN enable_data)
{
tPORT *p_port = (tPORT *)NULL;
UINT32 events = 0;
int i;
RFCOMM_TRACE_EVENT ("PORT_FlowInd fc:%d", enable_data);
if (dlci == 0)
{
p_mcb->peer_ready = enable_data;
}
else
{
if ((p_port = port_find_mcb_dlci_port (p_mcb, dlci)) == NULL)
return;
p_port->tx.peer_fc = !enable_data;
}
for (i = 0; i < MAX_RFC_PORTS; i++)
{
/* If DLCI is 0 event applies to all ports */
if (dlci == 0)
{
p_port = &rfc_cb.port.port[i];
if (!p_port->in_use
|| (p_port->rfc.p_mcb != p_mcb)
|| (p_port->rfc.state != RFC_STATE_OPENED))
continue;
}
events = 0;
/* Check if flow of data is still enabled */
events |= port_flow_control_user (p_port);
/* Check if data can be sent and send it */
events |= port_rfc_send_tx_data (p_port);
/* Mask out all events that are not of interest to user */
events &= p_port->ev_mask;
/* Send event to the application */
if (p_port->p_callback && events)
(p_port->p_callback)(events, p_port->inx);
/* If DLCI is not 0 event applies to one port only */
if (dlci != 0)
break;
}
}
/*******************************************************************************
**
** Function port_rfc_send_tx_data
**
** Description This function is when forward data can be sent to the peer
**
*******************************************************************************/
UINT32 port_rfc_send_tx_data (tPORT *p_port)
{
UINT32 events = 0;
BT_HDR *p_buf;
/* if there is data to be sent */
if (p_port->tx.queue_size > 0)
{
/* while the rfcomm peer is not flow controlling us, and peer is ready */
while (!p_port->tx.peer_fc && p_port->rfc.p_mcb && p_port->rfc.p_mcb->peer_ready)
{
/* get data from tx queue and send it */
mutex_global_lock();
if ((p_buf = (BT_HDR *)fixed_queue_try_dequeue(p_port->tx.queue)) != NULL)
{
p_port->tx.queue_size -= p_buf->len;
mutex_global_unlock();
RFCOMM_TRACE_DEBUG ("Sending RFCOMM_DataReq tx.queue_size=%d", p_port->tx.queue_size);
RFCOMM_DataReq (p_port->rfc.p_mcb, p_port->dlci, p_buf);
events |= PORT_EV_TXCHAR;
if (p_port->tx.queue_size == 0)
{
events |= PORT_EV_TXEMPTY;
break;
}
}
/* queue is empty-- all data sent */
else
{
mutex_global_unlock();
events |= PORT_EV_TXEMPTY;
break;
}
}
/* If we flow controlled user based on the queue size enable data again */
events |= port_flow_control_user (p_port);
}
return (events & p_port->ev_mask);
}
/*******************************************************************************
**
** Function port_rfc_closed
**
** Description This function when RFCOMM side of port is closed
**
*******************************************************************************/
void port_rfc_closed (tPORT *p_port, UINT8 res)
{
UINT8 old_signals;
UINT32 events = 0;
tRFC_MCB *p_mcb = p_port->rfc.p_mcb;
if ((p_port->state == PORT_STATE_OPENING) && (p_port->is_server))
{
/* The servr side has not been informed that connection is up, ignore */
RFCOMM_TRACE_EVENT ("port_rfc_closed in OPENING state ignored");
rfc_port_timer_stop (p_port);
p_port->rfc.state = RFC_STATE_CLOSED;
if (p_mcb)
{
p_mcb->port_inx[p_port->dlci] = 0;
/* If there are no more ports opened on this MCB release it */
rfc_check_mcb_active (p_mcb);
p_port->rfc.p_mcb = NULL;
}
/* Need to restore DLCI to listening state
* if the server was on the initiating RFC
*/
p_port->dlci &= 0xfe;
return;
}
if ((p_port->state != PORT_STATE_CLOSING) && (p_port->state != PORT_STATE_CLOSED))
{
p_port->line_status |= LINE_STATUS_FAILED;
old_signals = p_port->peer_ctrl.modem_signal;
p_port->peer_ctrl.modem_signal &= ~(PORT_DTRDSR_ON | PORT_CTSRTS_ON | PORT_DCD_ON);
events |= port_get_signal_changes (p_port, old_signals, p_port->peer_ctrl.modem_signal);
if(p_port->ev_mask & PORT_EV_CONNECT_ERR)
events |= PORT_EV_CONNECT_ERR;
}
RFCOMM_TRACE_EVENT ("port_rfc_closed state:%d sending events:%x", p_port->state, events);
if ((p_port->p_callback != NULL) && events)
p_port->p_callback (events, p_port->inx);
if (p_port->p_mgmt_callback)
p_port->p_mgmt_callback (res, p_port->inx);
p_port->rfc.state = RFC_STATE_CLOSED;
RFCOMM_TRACE_WARNING ("%s RFCOMM connection in state %d closed: %s (res: %d)",
__func__, p_port->state, PORT_GetResultString(res), res);
port_release_port (p_port);
}
/*******************************************************************************
**
** Function port_get_credits
**
** Description Set initial values for credits.
** Adjust max number of rx credits based on negotiated MTU.
** Check max allowed num of bytes, max allowed num buffers,
** should be less then 255
**
*******************************************************************************/
void port_get_credits (tPORT *p_port, UINT8 k)
{
p_port->credit_tx = k;
if (p_port->credit_tx == 0)
p_port->tx.peer_fc = TRUE;
}