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components/bt/host/bluedroid/stack/rfcomm/rfc_port_fsm.c
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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 file contains state machine and action routines for a port of the
* RFCOMM unit
*
******************************************************************************/
#include <string.h>
#include "common/bt_target.h"
#include "stack/rfcdefs.h"
#include "stack/btm_api.h"
#include "btm_int.h"
#include "stack/port_api.h"
#include "port_int.h"
#include "rfc_int.h"
#include "common/bt_defs.h"
#include "osi/allocator.h"
#include "osi/mutex.h"
#if (defined RFCOMM_INCLUDED && RFCOMM_INCLUDED == TRUE)
/********************************************************************************/
/* L O C A L F U N C T I O N P R O T O T Y P E S */
/********************************************************************************/
static void rfc_port_sm_state_closed (tPORT *p_port, UINT16 event, void *p_data);
static void rfc_port_sm_sabme_wait_ua (tPORT *p_port, UINT16 event, void *p_data);
static void rfc_port_sm_opened (tPORT *p_port, UINT16 event, void *p_data);
static void rfc_port_sm_orig_wait_sec_check (tPORT *p_port, UINT16 event, void *p_data);
static void rfc_port_sm_term_wait_sec_check (tPORT *p_port, UINT16 event, void *p_data);
static void rfc_port_sm_disc_wait_ua (tPORT *p_port, UINT16 event, void *p_data);
static void rfc_port_uplink_data (tPORT *p_port, BT_HDR *p_buf);
static void rfc_set_port_state(tPORT_STATE *port_pars, MX_FRAME *p_frame);
/*******************************************************************************
**
** Function rfc_port_sm_execute
**
** Description This function sends port events through the state
** machine.
**
** Returns void
**
*******************************************************************************/
void rfc_port_sm_execute (tPORT *p_port, UINT16 event, void *p_data)
{
RFCOMM_TRACE_DEBUG("%s st:%d, evt:%d\n", __func__, p_port->rfc.state, event);
if (!p_port) {
RFCOMM_TRACE_WARNING ("NULL port event %d", event);
return;
}
switch (p_port->rfc.state) {
case RFC_STATE_CLOSED:
rfc_port_sm_state_closed (p_port, event, p_data);
break;
case RFC_STATE_SABME_WAIT_UA:
rfc_port_sm_sabme_wait_ua (p_port, event, p_data);
break;
case RFC_STATE_ORIG_WAIT_SEC_CHECK:
rfc_port_sm_orig_wait_sec_check (p_port, event, p_data);
break;
case RFC_STATE_TERM_WAIT_SEC_CHECK:
rfc_port_sm_term_wait_sec_check (p_port, event, p_data);
break;
case RFC_STATE_OPENED:
rfc_port_sm_opened (p_port, event, p_data);
break;
case RFC_STATE_DISC_WAIT_UA:
rfc_port_sm_disc_wait_ua (p_port, event, p_data);
break;
}
}
/*******************************************************************************
**
** Function rfc_port_sm_state_closed
**
** Description This function handles events when the port is in
** CLOSED state. This state exists when port is
** being initially established.
**
** Returns void
**
*******************************************************************************/
void rfc_port_sm_state_closed (tPORT *p_port, UINT16 event, void *p_data)
{
switch (event) {
case RFC_EVENT_OPEN:
p_port->rfc.state = RFC_STATE_ORIG_WAIT_SEC_CHECK;
btm_sec_mx_access_request (p_port->rfc.p_mcb->bd_addr, BT_PSM_RFCOMM, TRUE,
BTM_SEC_PROTO_RFCOMM, (UINT32)(p_port->dlci / 2),
&rfc_sec_check_complete, p_port);
return;
case RFC_EVENT_CLOSE:
break;
case RFC_EVENT_CLEAR:
return;
case RFC_EVENT_DATA:
osi_free (p_data);
break;
case RFC_EVENT_SABME:
/* make sure the multiplexer disconnect timer is not running (reconnect case) */
rfc_timer_stop(p_port->rfc.p_mcb );
/* Open will be continued after security checks are passed */
p_port->rfc.state = RFC_STATE_TERM_WAIT_SEC_CHECK;
btm_sec_mx_access_request (p_port->rfc.p_mcb->bd_addr, BT_PSM_RFCOMM, FALSE,
BTM_SEC_PROTO_RFCOMM, (UINT32)(p_port->dlci / 2),
&rfc_sec_check_complete, p_port);
return;
case RFC_EVENT_UA:
return;
case RFC_EVENT_DM:
rfc_port_closed (p_port);
return;
case RFC_EVENT_UIH:
osi_free (p_data);
rfc_send_dm (p_port->rfc.p_mcb, p_port->dlci, FALSE);
return;
case RFC_EVENT_DISC:
rfc_send_dm (p_port->rfc.p_mcb, p_port->dlci, FALSE);
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 closed Event ignored %d", event);
return;
}
/*******************************************************************************
**
** 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:
osi_free (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:
osi_free (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 rfc_port_sm_term_wait_sec_check
**
** Description This function handles events for the port in the
** WAIT_SEC_CHECK state. SABME has been received from the
** peer and Security Manager verifes BD_ADDR, before we can
** send ESTABLISH_IND to the Port entity
**
** Returns void
**
*******************************************************************************/
void rfc_port_sm_term_wait_sec_check (tPORT *p_port, UINT16 event, void *p_data)
{
switch (event) {
case RFC_EVENT_SEC_COMPLETE:
if (*((UINT8 *)p_data) != BTM_SUCCESS) {
/* Authentication/authorization failed. If link is still */
/* up send DM and check if we need to start inactive timer */
if (p_port->rfc.p_mcb) {
rfc_send_dm (p_port->rfc.p_mcb, p_port->dlci, TRUE);
p_port->rfc.p_mcb->is_disc_initiator = TRUE;
port_rfc_closed (p_port, PORT_SEC_FAILED);
}
} else {
PORT_DlcEstablishInd (p_port->rfc.p_mcb, p_port->dlci, p_port->rfc.p_mcb->peer_l2cap_mtu);
}
return;
case RFC_EVENT_OPEN:
case RFC_EVENT_CLOSE:
RFCOMM_TRACE_ERROR ("Port error state %d event %d", p_port->rfc.state, event);
return;
case RFC_EVENT_CLEAR:
btm_sec_abort_access_req (p_port->rfc.p_mcb->bd_addr);
rfc_port_closed (p_port);
return;
case RFC_EVENT_DATA:
RFCOMM_TRACE_ERROR ("Port error state Term Wait Sec event Data");
osi_free (p_data);
return;
case RFC_EVENT_SABME:
/* Ignore SABME retransmission if client dares to do so */
return;
case RFC_EVENT_DISC:
btm_sec_abort_access_req (p_port->rfc.p_mcb->bd_addr);
p_port->rfc.state = RFC_STATE_CLOSED;
rfc_send_ua (p_port->rfc.p_mcb, p_port->dlci);
PORT_DlcReleaseInd (p_port->rfc.p_mcb, p_port->dlci);
return;
case RFC_EVENT_UIH:
osi_free (p_data);
return;
case RFC_EVENT_ESTABLISH_RSP:
if (*((UINT8 *)p_data) != RFCOMM_SUCCESS) {
if (p_port->rfc.p_mcb) {
rfc_send_dm (p_port->rfc.p_mcb, p_port->dlci, TRUE);
if (*((UINT8 *)p_data) == RFCOMM_LOW_RESOURCES) {
port_rfc_closed(p_port, PORT_NO_RESOURCES);
} else {
port_rfc_closed(p_port, PORT_UNKNOWN_ERROR);
}
}
} else {
rfc_send_ua (p_port->rfc.p_mcb, p_port->dlci);
p_port->rfc.state = RFC_STATE_OPENED;
}
return;
}
RFCOMM_TRACE_WARNING ("Port state term_wait_sec_check Event ignored %d", event);
}
/*******************************************************************************
**
** Function rfc_port_sm_orig_wait_sec_check
**
** Description This function handles events for the port in the
** ORIG_WAIT_SEC_CHECK state. RFCOMM is waiting for Security
** manager to finish before sending SABME to the peer
**
** Returns void
**
*******************************************************************************/
void rfc_port_sm_orig_wait_sec_check (tPORT *p_port, UINT16 event, void *p_data)
{
switch (event) {
case RFC_EVENT_SEC_COMPLETE:
if (*((UINT8 *)p_data) != BTM_SUCCESS) {
p_port->rfc.p_mcb->is_disc_initiator = TRUE;
PORT_DlcEstablishCnf (p_port->rfc.p_mcb, p_port->dlci, 0, RFCOMM_SECURITY_ERR);
rfc_port_closed (p_port);
return;
}
rfc_send_sabme (p_port->rfc.p_mcb, p_port->dlci);
rfc_port_timer_start (p_port, RFC_PORT_T1_TIMEOUT);
p_port->rfc.state = RFC_STATE_SABME_WAIT_UA;
return;
case RFC_EVENT_OPEN:
case RFC_EVENT_SABME: /* Peer should not use the same dlci */
RFCOMM_TRACE_ERROR ("Port error state %d event %d", p_port->rfc.state, event);
return;
case RFC_EVENT_CLOSE:
btm_sec_abort_access_req (p_port->rfc.p_mcb->bd_addr);
rfc_port_closed (p_port);
return;
case RFC_EVENT_DATA:
RFCOMM_TRACE_ERROR ("Port error state Orig Wait Sec event Data");
osi_free (p_data);
return;
case RFC_EVENT_UIH:
osi_free (p_data);
return;
}
RFCOMM_TRACE_WARNING ("Port state orig_wait_sec_check Event ignored %d", event);
}
/*******************************************************************************
**
** 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);
}
/*******************************************************************************
**
** Function rfc_port_sm_disc_wait_ua
**
** Description This function handles events when DISC on the DLC was
** sent and SM is waiting for UA or DM.
**
** Returns void
**
*******************************************************************************/
void rfc_port_sm_disc_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_CLEAR:
rfc_port_closed (p_port);
return;
case RFC_EVENT_DATA:
osi_free (p_data);
return;
case RFC_EVENT_UA:
p_port->rfc.p_mcb->is_disc_initiator = TRUE;
/* Case falls through */
case RFC_EVENT_DM:
rfc_port_closed (p_port);
return;
case RFC_EVENT_SABME:
rfc_send_dm (p_port->rfc.p_mcb, p_port->dlci, TRUE);
return;
case RFC_EVENT_DISC:
rfc_send_dm (p_port->rfc.p_mcb, p_port->dlci, TRUE);
return;
case RFC_EVENT_UIH:
osi_free (p_data);
rfc_send_dm (p_port->rfc.p_mcb, p_port->dlci, FALSE);
return;
case RFC_EVENT_TIMEOUT:
rfc_port_closed (p_port);
return;
}
RFCOMM_TRACE_WARNING ("Port state disc_wait_ua Event ignored %d", event);
}
/*******************************************************************************
**
** Function rfc_port_uplink_data
**
** Description This function handles uplink information data frame.
**
*******************************************************************************/
void rfc_port_uplink_data (tPORT *p_port, BT_HDR *p_buf)
{
PORT_DataInd (p_port->rfc.p_mcb, p_port->dlci, p_buf);
}
/*******************************************************************************
**
** Function rfc_process_pn
**
** Description This function handles DLC parameter negotiation frame.
** Record MTU and pass indication to the upper layer.
**
*******************************************************************************/
void rfc_process_pn (tRFC_MCB *p_mcb, BOOLEAN is_command, MX_FRAME *p_frame)
{
tPORT *p_port;
UINT8 dlci = p_frame->dlci;
if (is_command) {
/* Ignore if Multiplexer is being shut down */
if (p_mcb->state != RFC_MX_STATE_DISC_WAIT_UA) {
PORT_ParNegInd (p_mcb, dlci, p_frame->u.pn.mtu,
p_frame->u.pn.conv_layer, p_frame->u.pn.k);
} else {
rfc_send_dm(p_mcb, dlci, FALSE);
RFCOMM_TRACE_WARNING("***** MX PN while disconnecting *****");
}
return;
}
/* If we are not awaiting response just ignore it */
p_port = port_find_mcb_dlci_port (p_mcb, dlci);
if ((p_port == NULL) || !(p_port->rfc.expected_rsp & RFC_RSP_PN)) {
return;
}
p_port->rfc.expected_rsp &= ~RFC_RSP_PN;
rfc_port_timer_stop (p_port);
PORT_ParNegCnf (p_mcb, dlci, p_frame->u.pn.mtu,
p_frame->u.pn.conv_layer, p_frame->u.pn.k);
}
/*******************************************************************************
**
** Function rfc_process_rpn
**
** Description This function handles Remote DLC parameter negotiation
** command/response. Pass command to the user.
**
*******************************************************************************/
void rfc_process_rpn (tRFC_MCB *p_mcb, BOOLEAN is_command,
BOOLEAN is_request, MX_FRAME *p_frame)
{
tPORT_STATE port_pars;
tPORT *p_port;
if ((p_port = port_find_mcb_dlci_port (p_mcb, p_frame->dlci)) == NULL) {
/* This is the first command on the port */
if (is_command) {
memset(&port_pars, 0, sizeof(tPORT_STATE));
rfc_set_port_state(&port_pars, p_frame);
PORT_PortNegInd(p_mcb, p_frame->dlci, &port_pars, p_frame->u.rpn.param_mask);
}
return;
}
if (is_command && is_request) {
/* This is the special situation when peer just request local pars */
port_pars = p_port->peer_port_pars;
rfc_send_rpn (p_mcb, p_frame->dlci, FALSE, &p_port->peer_port_pars, 0);
return;
}
port_pars = p_port->peer_port_pars;
rfc_set_port_state(&port_pars, p_frame);
if (is_command) {
PORT_PortNegInd (p_mcb, p_frame->dlci, &port_pars, p_frame->u.rpn.param_mask);
return;
}
/* If we are not awaiting response just ignore it */
p_port = port_find_mcb_dlci_port (p_mcb, p_frame->dlci);
if ((p_port == NULL) || !(p_port->rfc.expected_rsp & (RFC_RSP_RPN | RFC_RSP_RPN_REPLY))) {
return;
}
/* If we sent a request for port parameters to the peer he is replying with */
/* mask 0. */
rfc_port_timer_stop (p_port);
if (p_port->rfc.expected_rsp & RFC_RSP_RPN_REPLY) {
p_port->rfc.expected_rsp &= ~RFC_RSP_RPN_REPLY;
p_port->peer_port_pars = port_pars;
if ((port_pars.fc_type == (RFCOMM_FC_RTR_ON_INPUT | RFCOMM_FC_RTR_ON_OUTPUT))
|| (port_pars.fc_type == (RFCOMM_FC_RTC_ON_INPUT | RFCOMM_FC_RTC_ON_OUTPUT))) {
/* This is satisfactory port parameters. Set mask as it was Ok */
p_frame->u.rpn.param_mask = RFCOMM_RPN_PM_MASK;
} else {
/* Current peer parameters are not good, try to fix them */
p_port->peer_port_pars.fc_type = (RFCOMM_FC_RTR_ON_INPUT | RFCOMM_FC_RTR_ON_OUTPUT);
p_port->rfc.expected_rsp |= RFC_RSP_RPN;
rfc_send_rpn (p_mcb, p_frame->dlci, TRUE, &p_port->peer_port_pars,
RFCOMM_RPN_PM_RTR_ON_INPUT | RFCOMM_RPN_PM_RTR_ON_OUTPUT);
rfc_port_timer_start (p_port, RFC_T2_TIMEOUT) ;
return;
}
} else {
p_port->rfc.expected_rsp &= ~RFC_RSP_RPN;
}
/* Check if all suggested parameters were accepted */
if (((p_frame->u.rpn.param_mask & (RFCOMM_RPN_PM_RTR_ON_INPUT | RFCOMM_RPN_PM_RTR_ON_OUTPUT)) ==
(RFCOMM_RPN_PM_RTR_ON_INPUT | RFCOMM_RPN_PM_RTR_ON_OUTPUT))
|| ((p_frame->u.rpn.param_mask & (RFCOMM_RPN_PM_RTC_ON_INPUT | RFCOMM_RPN_PM_RTC_ON_OUTPUT)) ==
(RFCOMM_RPN_PM_RTC_ON_INPUT | RFCOMM_RPN_PM_RTC_ON_OUTPUT))) {
PORT_PortNegCnf (p_mcb, p_port->dlci, &port_pars, RFCOMM_SUCCESS);
return;
}
/* If we were proposing RTR flow control try RTC flow control */
/* If we were proposing RTC flow control try no flow control */
/* otherwise drop the connection */
if (p_port->peer_port_pars.fc_type == (RFCOMM_FC_RTR_ON_INPUT | RFCOMM_FC_RTR_ON_OUTPUT)) {
/* Current peer parameters are not good, try to fix them */
p_port->peer_port_pars.fc_type = (RFCOMM_FC_RTC_ON_INPUT | RFCOMM_FC_RTC_ON_OUTPUT);
p_port->rfc.expected_rsp |= RFC_RSP_RPN;
rfc_send_rpn (p_mcb, p_frame->dlci, TRUE, &p_port->peer_port_pars,
RFCOMM_RPN_PM_RTC_ON_INPUT | RFCOMM_RPN_PM_RTC_ON_OUTPUT);
rfc_port_timer_start (p_port, RFC_T2_TIMEOUT) ;
return;
}
/* Other side does not support flow control */
if (p_port->peer_port_pars.fc_type == (RFCOMM_FC_RTC_ON_INPUT | RFCOMM_FC_RTC_ON_OUTPUT)) {
p_port->peer_port_pars.fc_type = RFCOMM_FC_OFF;
PORT_PortNegCnf (p_mcb, p_port->dlci, &port_pars, RFCOMM_SUCCESS);
}
}
/*******************************************************************************
**
** Function rfc_process_msc
**
** Description This function handles Modem Status Command.
** Pass command to the user.
**
*******************************************************************************/
void rfc_process_msc (tRFC_MCB *p_mcb, BOOLEAN is_command, MX_FRAME *p_frame)
{
tPORT_CTRL pars;
tPORT *p_port;
UINT8 modem_signals = p_frame->u.msc.signals;
BOOLEAN new_peer_fc = FALSE;
p_port = port_find_mcb_dlci_port (p_mcb, p_frame->dlci);
if (p_port == NULL) {
return;
}
pars.modem_signal = 0;
if (modem_signals & RFCOMM_MSC_RTC) {
pars.modem_signal |= MODEM_SIGNAL_DTRDSR;
}
if (modem_signals & RFCOMM_MSC_RTR) {
pars.modem_signal |= MODEM_SIGNAL_RTSCTS;
}
if (modem_signals & RFCOMM_MSC_IC) {
pars.modem_signal |= MODEM_SIGNAL_RI;
}
if (modem_signals & RFCOMM_MSC_DV) {
pars.modem_signal |= MODEM_SIGNAL_DCD;
}
pars.fc = ((modem_signals & RFCOMM_MSC_FC) == RFCOMM_MSC_FC);
pars.break_signal = (p_frame->u.msc.break_present) ?
p_frame->u.msc.break_duration : 0;
pars.discard_buffers = 0;
pars.break_signal_seq = RFCOMM_CTRL_BREAK_IN_SEQ; /* this is default */
/* Check if this command is passed only to indicate flow control */
if (is_command) {
rfc_send_msc (p_mcb, p_frame->dlci, FALSE, &pars);
if (p_port->rfc.p_mcb->flow != PORT_FC_CREDIT) {
/* Spec 1.1 indicates that only FC bit is used for flow control */
p_port->peer_ctrl.fc = new_peer_fc = pars.fc;
if (new_peer_fc != p_port->tx.peer_fc) {
PORT_FlowInd (p_mcb, p_frame->dlci, (BOOLEAN)!new_peer_fc);
}
}
PORT_ControlInd (p_mcb, p_frame->dlci, &pars);
return;
}
/* If we are not awaiting response just ignore it */
if (!(p_port->rfc.expected_rsp & RFC_RSP_MSC)) {
return;
}
p_port->rfc.expected_rsp &= ~RFC_RSP_MSC;
rfc_port_timer_stop (p_port);
PORT_ControlCnf (p_port->rfc.p_mcb, p_port->dlci, &pars);
}
/*******************************************************************************
**
** Function rfc_process_rls
**
** Description This function handles Remote Line Status command.
** Pass command to the user.
**
*******************************************************************************/
void rfc_process_rls (tRFC_MCB *p_mcb, BOOLEAN is_command, MX_FRAME *p_frame)
{
tPORT *p_port;
if (is_command) {
PORT_LineStatusInd (p_mcb, p_frame->dlci, p_frame->u.rls.line_status);
rfc_send_rls (p_mcb, p_frame->dlci, FALSE, p_frame->u.rls.line_status);
} else {
p_port = port_find_mcb_dlci_port (p_mcb, p_frame->dlci);
/* If we are not awaiting response just ignore it */
if (!p_port || !(p_port->rfc.expected_rsp & RFC_RSP_RLS)) {
return;
}
p_port->rfc.expected_rsp &= ~RFC_RSP_RLS;
rfc_port_timer_stop (p_port);
}
}
/*******************************************************************************
**
** Function rfc_process_nsc
**
** Description This function handles None Supported Command frame.
**
*******************************************************************************/
void rfc_process_nsc (tRFC_MCB *p_mcb, MX_FRAME *p_frame)
{
UNUSED(p_mcb);
UNUSED(p_frame);
}
/*******************************************************************************
**
** Function rfc_process_test
**
** Description This function handles Test frame. If this is a command
** reply to it. Otherwise pass response to the user.
**
*******************************************************************************/
void rfc_process_test_rsp (tRFC_MCB *p_mcb, BT_HDR *p_buf)
{
UNUSED(p_mcb);
osi_free (p_buf);
}
/*******************************************************************************
**
** Function rfc_process_fcon
**
** Description This function handles FCON frame. The peer entity is able
** to receive new information
**
*******************************************************************************/
void rfc_process_fcon (tRFC_MCB *p_mcb, BOOLEAN is_command)
{
if (is_command) {
rfc_cb.rfc.peer_rx_disabled = FALSE;
rfc_send_fcon (p_mcb, FALSE);
if (!p_mcb->l2cap_congested) {
PORT_FlowInd (p_mcb, 0, TRUE);
}
}
}
/*******************************************************************************
**
** Function rfc_process_fcoff
**
** Description This function handles FCOFF frame. The peer entity is unable
** to receive new information
**
*******************************************************************************/
void rfc_process_fcoff (tRFC_MCB *p_mcb, BOOLEAN is_command)
{
if (is_command) {
rfc_cb.rfc.peer_rx_disabled = TRUE;
if (!p_mcb->l2cap_congested) {
PORT_FlowInd (p_mcb, 0, FALSE);
}
rfc_send_fcoff (p_mcb, FALSE);
}
}
/*******************************************************************************
**
** Function rfc_process_l2cap_congestion
**
** Description This function handles L2CAP congestion messages
**
*******************************************************************************/
void rfc_process_l2cap_congestion (tRFC_MCB *p_mcb, BOOLEAN is_congested)
{
p_mcb->l2cap_congested = is_congested;
if (!is_congested) {
rfc_check_send_cmd(p_mcb, NULL);
}
if (!rfc_cb.rfc.peer_rx_disabled) {
if (!is_congested) {
PORT_FlowInd (p_mcb, 0, TRUE);
} else {
PORT_FlowInd (p_mcb, 0, FALSE);
}
}
}
/*******************************************************************************
**
** Function rfc_set_port_pars
**
** Description This function sets the tPORT_STATE structure given a p_frame.
**
*******************************************************************************/
void rfc_set_port_state(tPORT_STATE *port_pars, MX_FRAME *p_frame)
{
if (p_frame->u.rpn.param_mask & RFCOMM_RPN_PM_BIT_RATE) {
port_pars->baud_rate = p_frame->u.rpn.baud_rate;
}
if (p_frame->u.rpn.param_mask & RFCOMM_RPN_PM_DATA_BITS) {
port_pars->byte_size = p_frame->u.rpn.byte_size;
}
if (p_frame->u.rpn.param_mask & RFCOMM_RPN_PM_STOP_BITS) {
port_pars->stop_bits = p_frame->u.rpn.stop_bits;
}
if (p_frame->u.rpn.param_mask & RFCOMM_RPN_PM_PARITY) {
port_pars->parity = p_frame->u.rpn.parity;
}
if (p_frame->u.rpn.param_mask & RFCOMM_RPN_PM_PARITY_TYPE) {
port_pars->parity_type = p_frame->u.rpn.parity_type;
}
if (p_frame->u.rpn.param_mask & (RFCOMM_RPN_PM_XONXOFF_ON_INPUT |
RFCOMM_RPN_PM_XONXOFF_ON_OUTPUT |
RFCOMM_RPN_PM_RTR_ON_INPUT |
RFCOMM_RPN_PM_RTR_ON_OUTPUT |
RFCOMM_RPN_PM_RTC_ON_INPUT |
RFCOMM_RPN_PM_RTC_ON_OUTPUT)) {
port_pars->fc_type = p_frame->u.rpn.fc_type;
}
if (p_frame->u.rpn.param_mask & RFCOMM_RPN_PM_XON_CHAR) {
port_pars->xon_char = p_frame->u.rpn.xon_char;
}
if (p_frame->u.rpn.param_mask & RFCOMM_RPN_PM_XOFF_CHAR) {
port_pars->xoff_char = p_frame->u.rpn.xoff_char;
}
}
#endif ///(defined RFCOMM_INCLUDED && RFCOMM_INCLUDED == TRUE)
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