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PL286/system/bt/stack/rfcomm/port_rfc.cc

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/******************************************************************************
*
* 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 <base/logging.h>
#include <string.h>
#include "osi/include/mutex.h"
#include "osi/include/osi.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_t port_rfc_send_tx_data(tPORT* p_port);
void port_rfc_closed(tPORT* p_port, uint8_t res);
void port_get_credits(tPORT* p_port, uint8_t 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 */
p_mcb = rfc_alloc_multiplexer_channel(p_port->bd_addr, true);
if (p_mcb == 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_t old_signals;
uint32_t 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_t result) {
tPORT* p_port;
int i;
bool 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_t dlci, uint16_t mtu, uint8_t cl,
uint8_t k) {
tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
uint8_t our_cl;
uint8_t 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;
}
p_port->bd_addr = p_mcb->bd_addr;
/* 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_t dlci, uint16_t mtu, uint8_t cl,
uint8_t 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)) {
RFCOMM_TRACE_WARNING("%s, negotiation fails, index=%d", __func__,
p_port->inx);
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_t dlci, uint16_t 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);
VLOG(1) << __func__ << " p_mcb addr:" << p_mcb->bd_addr;
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_t dlci, uint16_t mtu,
uint16_t 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_t dlci, tPORT_STATE* p_pars,
uint16_t 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_t dlci,
UNUSED_ATTR tPORT_STATE* p_pars, uint16_t result) {
tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
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_t dlci, tPORT_CTRL* p_pars) {
tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
uint32_t event;
uint8_t 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_t dlci,
UNUSED_ATTR tPORT_CTRL* p_pars) {
tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
uint32_t event = 0;
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_t dlci, uint8_t line_status) {
tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
uint32_t 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_t 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_t dlci, BT_HDR* p_buf) {
tPORT* p_port = port_find_mcb_dlci_port(p_mcb, dlci);
uint8_t rx_char1;
uint32_t events = 0;
uint8_t* 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_t*)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;
}
/* 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_t*)(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_t*)(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_t dlci, bool enable_data) {
tPORT* p_port = (tPORT*)NULL;
uint32_t events = 0;
int i;
RFCOMM_TRACE_EVENT("PORT_FlowInd fc:%d", enable_data);
if (dlci == 0) {
p_mcb->peer_ready = enable_data;
} else {
p_port = port_find_mcb_dlci_port(p_mcb, dlci);
if (p_port == 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_t port_rfc_send_tx_data(tPORT* p_port) {
uint32_t 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();
p_buf = (BT_HDR*)fixed_queue_try_dequeue(p_port->tx.queue);
if (p_buf != 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 Called when RFCOMM port is closed
*
******************************************************************************/
void port_rfc_closed(tPORT* p_port, uint8_t res) {
uint8_t old_signals;
uint32_t events = 0;
tRFC_MCB* p_mcb = p_port->rfc.p_mcb;
if ((p_port->state == PORT_STATE_OPENING) && (p_port->is_server)) {
/* The server side was not informed that connection is up, ignore */
RFCOMM_TRACE_WARNING("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;
}
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 closed, index=%d, state=%d reason=%s[%d], "
"UUID=%04X, bd_addr=%s, is_server=%d",
__func__, p_port->inx, p_port->state, PORT_GetResultString(res), res,
p_port->uuid, p_port->bd_addr.ToString().c_str(), p_port->is_server);
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_t k) {
p_port->credit_tx = k;
if (p_port->credit_tx == 0) p_port->tx.peer_fc = true;
}