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PL286/system/bt/stack/rfcomm/rfc_port_fsm.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 file contains state machine and action routines for a port of the
* RFCOMM unit
*
******************************************************************************/
#include <string.h>
#include "bt_common.h"
#include "bt_target.h"
#include "bt_utils.h"
#include "btm_api.h"
#include "btm_int.h"
#include "osi/include/osi.h"
#include "port_api.h"
#include "port_int.h"
#include "rfc_int.h"
#include "rfcdefs.h"
/******************************************************************************/
/* 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_t event,
void* p_data);
static void rfc_port_sm_sabme_wait_ua(tPORT* p_port, uint16_t event,
void* p_data);
static void rfc_port_sm_opened(tPORT* p_port, uint16_t event, void* p_data);
static void rfc_port_sm_orig_wait_sec_check(tPORT* p_port, uint16_t event,
void* p_data);
static void rfc_port_sm_term_wait_sec_check(tPORT* p_port, uint16_t event,
void* p_data);
static void rfc_port_sm_disc_wait_ua(tPORT* p_port, uint16_t 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_t event, void* p_data) {
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_t 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_t)(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_t)(p_port->dlci / 2),
&rfc_sec_check_complete, p_port);
return;
case RFC_EVENT_UA:
return;
case RFC_EVENT_DM:
RFCOMM_TRACE_WARNING("%s, RFC_EVENT_DM, index=%d", __func__, p_port->inx);
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_t 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:
RFCOMM_TRACE_WARNING("%s, RFC_EVENT_CLEAR, index=%d", __func__,
p_port->inx);
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:
RFCOMM_TRACE_WARNING("%s, RFC_EVENT_DM, index=%d", __func__, p_port->inx);
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:
RFCOMM_TRACE_WARNING("%s, RFC_EVENT_DISC, index=%d", __func__,
p_port->inx);
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 address, before we can
* send ESTABLISH_IND to the Port entity
*
* Returns void
*
******************************************************************************/
void rfc_port_sm_term_wait_sec_check(tPORT* p_port, uint16_t event,
void* p_data) {
switch (event) {
case RFC_EVENT_SEC_COMPLETE:
if (*((uint8_t*)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:
RFCOMM_TRACE_WARNING("%s, RFC_EVENT_CLEAR, index=%d", __func__,
p_port->inx);
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_t*)p_data) != RFCOMM_SUCCESS) {
if (p_port->rfc.p_mcb)
rfc_send_dm(p_port->rfc.p_mcb, p_port->dlci, true);
} 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_t event,
void* p_data) {
switch (event) {
case RFC_EVENT_SEC_COMPLETE:
if (*((uint8_t*)p_data) != BTM_SUCCESS) {
RFCOMM_TRACE_ERROR("%s, RFC_EVENT_SEC_COMPLETE, index=%d, result=%d",
__func__, event, p_port->inx, *((uint8_t*)p_data));
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:
RFCOMM_TRACE_WARNING("%s, RFC_EVENT_CLOSE, index=%d", __func__,
p_port->inx);
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_t 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:
RFCOMM_TRACE_WARNING("%s, RFC_EVENT_CLEAR, index=%d", __func__,
p_port->inx);
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_t)(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:
RFCOMM_TRACE_WARNING("%s, RFC_EVENT_DM, index=%d", __func__, p_port->inx);
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_t 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:
RFCOMM_TRACE_WARNING("%s, RFC_EVENT_CLEAR, index=%d", __func__, event,
p_port->inx);
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:
RFCOMM_TRACE_WARNING("%s, RFC_EVENT_DM|RFC_EVENT_UA[%d], index=%d",
__func__, event, p_port->inx);
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:
RFCOMM_TRACE_ERROR("%s, RFC_EVENT_TIMEOUT, index=%d", __func__,
p_port->inx);
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, bool is_command, MX_FRAME* p_frame) {
tPORT* p_port;
uint8_t 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, bool is_command, bool is_request,
MX_FRAME* p_frame) {
tPORT_STATE port_pars;
tPORT* p_port;
p_port = port_find_mcb_dlci_port(p_mcb, p_frame->dlci);
if (p_port == 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, bool is_command, MX_FRAME* p_frame) {
tPORT_CTRL pars;
tPORT* p_port;
uint8_t modem_signals = p_frame->u.msc.signals;
bool 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, (bool)!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, bool 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(UNUSED_ATTR tRFC_MCB* p_mcb,
UNUSED_ATTR MX_FRAME* 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(UNUSED_ATTR tRFC_MCB* p_mcb, BT_HDR* p_buf) {
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, bool 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, bool 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, bool 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;
}