/******************************************************************************
*
* Copyright 2006-2012 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 the action functions associated with the channel
* control block state machine.
*
******************************************************************************/
#include <string.h>
#include "avdt_api.h"
#include "avdt_int.h"
#include "avdtc_api.h"
#include "bt_common.h"
#include "bt_target.h"
#include "bt_types.h"
#include "bt_utils.h"
#include "btm_api.h"
#include "btu.h"
#include "osi/include/osi.h"
/*******************************************************************************
*
* Function avdt_ccb_clear_ccb
*
* Description This function clears out certain buffers, queues, and
* other data elements of a ccb.
*
*
* Returns void.
*
******************************************************************************/
static void avdt_ccb_clear_ccb(AvdtpCcb* p_ccb) {
BT_HDR* p_buf;
/* clear certain ccb variables */
p_ccb->cong = false;
p_ccb->ret_count = 0;
/* free message being fragmented */
osi_free_and_reset((void**)&p_ccb->p_curr_msg);
/* free message being reassembled */
osi_free_and_reset((void**)&p_ccb->p_rx_msg);
/* clear out response queue */
while ((p_buf = (BT_HDR*)fixed_queue_try_dequeue(p_ccb->rsp_q)) != NULL)
osi_free(p_buf);
}
/*******************************************************************************
*
* Function avdt_ccb_chan_open
*
* Description This function calls avdt_ad_open_req() to
* initiate a signaling channel connection.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_chan_open(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
BTM_SetOutService(p_ccb->peer_addr, BTM_SEC_SERVICE_AVDTP, AVDT_CHAN_SIG);
avdt_ad_open_req(AVDT_CHAN_SIG, p_ccb, NULL, AVDT_INT);
}
/*******************************************************************************
*
* Function avdt_ccb_chan_close
*
* Description This function calls avdt_ad_close_req() to close a
* signaling channel connection.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_chan_close(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
/* close the transport channel used by this CCB */
avdt_ad_close_req(AVDT_CHAN_SIG, p_ccb, NULL);
}
/*******************************************************************************
*
* Function avdt_ccb_chk_close
*
* Description This function checks for active streams on this CCB.
* If there are none, it starts an idle timer.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_chk_close(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
int i;
AvdtpScb* p_scb = &(p_ccb->scb[0]);
/* see if there are any active scbs associated with this ccb */
for (i = 0; i < AVDT_NUM_SEPS; i++, p_scb++) {
if ((p_scb->allocated) && (p_scb->p_ccb == p_ccb)) {
break;
}
}
/* if no active scbs start idle timer */
if (i == AVDT_NUM_SEPS) {
alarm_cancel(p_ccb->ret_ccb_timer);
alarm_cancel(p_ccb->rsp_ccb_timer);
uint64_t interval_ms = avdtp_cb.rcb.idle_tout * 1000;
alarm_set_on_mloop(p_ccb->idle_ccb_timer, interval_ms,
avdt_ccb_idle_ccb_timer_timeout, p_ccb);
}
}
/*******************************************************************************
*
* Function avdt_ccb_hdl_discover_cmd
*
* Description This function is called when a discover command is
* received from the peer. It gathers up the stream
* information for all allocated streams and initiates
* sending of a discover response.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_hdl_discover_cmd(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
tAVDT_SEP_INFO sep_info[AVDT_NUM_SEPS];
AvdtpScb* p_scb = &(p_ccb->scb[0]);
AVDT_TRACE_DEBUG("%s: p_ccb index=%d", __func__, avdt_ccb_to_idx(p_ccb));
p_data->msg.discover_rsp.p_sep_info = sep_info;
p_data->msg.discover_rsp.num_seps = 0;
/* for all allocated scbs */
for (int i = 0; i < AVDT_NUM_SEPS; i++, p_scb++) {
if (p_scb->allocated) {
/* copy sep info */
sep_info[p_data->msg.discover_rsp.num_seps].in_use = p_scb->in_use;
sep_info[p_data->msg.discover_rsp.num_seps].seid = p_scb->ScbHandle();
sep_info[p_data->msg.discover_rsp.num_seps].media_type =
p_scb->stream_config.media_type;
sep_info[p_data->msg.discover_rsp.num_seps].tsep =
p_scb->stream_config.tsep;
p_data->msg.discover_rsp.num_seps++;
}
}
/* send response */
avdt_ccb_event(p_ccb, AVDT_CCB_API_DISCOVER_RSP_EVT, p_data);
}
/*******************************************************************************
*
* Function avdt_ccb_hdl_discover_rsp
*
* Description This function is called when a discover response or
* reject is received from the peer. It calls the application
* callback function with the results.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_hdl_discover_rsp(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
/* we're done with procedure */
p_ccb->proc_busy = false;
/* call app callback with results */
(*p_ccb->proc_cback)(0, p_ccb->peer_addr, AVDT_DISCOVER_CFM_EVT,
(tAVDT_CTRL*)(&p_data->msg.discover_rsp),
p_ccb->BtaAvScbIndex());
}
/*******************************************************************************
*
* Function avdt_ccb_hdl_getcap_cmd
*
* Description This function is called when a get capabilities command
* is received from the peer. It retrieves the stream
* configuration for the requested stream and initiates
* sending of a get capabilities response.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_hdl_getcap_cmd(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
AvdtpScb* p_scb;
/* look up scb for seid sent to us */
p_scb = avdt_scb_by_hdl(p_data->msg.single.seid);
p_data->msg.svccap.p_cfg = &p_scb->stream_config.cfg;
avdt_ccb_event(p_ccb, AVDT_CCB_API_GETCAP_RSP_EVT, p_data);
}
/*******************************************************************************
*
* Function avdt_ccb_hdl_getcap_rsp
*
* Description This function is called with a get capabilities response
* or reject is received from the peer. It calls the
* application callback function with the results.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_hdl_getcap_rsp(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
/* we're done with procedure */
p_ccb->proc_busy = false;
/* call app callback with results */
(*p_ccb->proc_cback)(0, p_ccb->peer_addr, AVDT_GETCAP_CFM_EVT,
(tAVDT_CTRL*)(&p_data->msg.svccap),
p_ccb->BtaAvScbIndex());
}
/*******************************************************************************
*
* Function avdt_ccb_hdl_start_cmd
*
* Description This function is called when a start command is received
* from the peer. It verifies that all requested streams
* are in the proper state. If so, it initiates sending of
* a start response. Otherwise it sends a start reject.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_hdl_start_cmd(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
uint8_t err_code = 0;
/* verify all streams in the right state */
uint8_t seid =
avdt_scb_verify(p_ccb, AVDT_VERIFY_START, p_data->msg.multi.seid_list,
p_data->msg.multi.num_seps, &err_code);
if (seid == 0 && err_code == 0) {
/* we're ok, send response */
avdt_ccb_event(p_ccb, AVDT_CCB_API_START_RSP_EVT, p_data);
} else {
/* not ok, send reject */
p_data->msg.hdr.err_code = err_code;
p_data->msg.hdr.err_param = seid;
avdt_msg_send_rej(p_ccb, AVDT_SIG_START, &p_data->msg);
}
}
/*******************************************************************************
*
* Function avdt_ccb_hdl_start_rsp
*
* Description This function is called when a start response or reject
* is received from the peer. Using the SEIDs stored in the
* current command message, it sends a start response or start
* reject event to each SCB associated with the command.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_hdl_start_rsp(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
uint8_t event;
int i;
uint8_t* p;
AvdtpScb* p_scb;
/* determine rsp or rej event */
event = (p_data->msg.hdr.err_code == 0) ? AVDT_SCB_MSG_START_RSP_EVT
: AVDT_SCB_MSG_START_REJ_EVT;
/* get to where seid's are stashed in current cmd */
p = (uint8_t*)(p_ccb->p_curr_cmd + 1);
/* little trick here; length of current command equals number of streams */
for (i = 0; i < p_ccb->p_curr_cmd->len; i++) {
p_scb = avdt_scb_by_hdl(p[i]);
if (p_scb != NULL) {
avdt_scb_event(p_scb, event, (tAVDT_SCB_EVT*)&p_data->msg);
}
}
}
/*******************************************************************************
*
* Function avdt_ccb_hdl_suspend_cmd
*
* Description This function is called when a suspend command is received
* from the peer. It verifies that all requested streams are
* in the proper state. If so, it initiates sending of a
* suspend response. Otherwise it sends a suspend reject.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_hdl_suspend_cmd(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
uint8_t seid;
uint8_t err_code = 0;
/* verify all streams in the right state */
if ((seid = avdt_scb_verify(p_ccb, AVDT_VERIFY_SUSPEND,
p_data->msg.multi.seid_list,
p_data->msg.multi.num_seps, &err_code)) == 0 &&
err_code == 0) {
/* we're ok, send response */
avdt_ccb_event(p_ccb, AVDT_CCB_API_SUSPEND_RSP_EVT, p_data);
} else {
/* not ok, send reject */
p_data->msg.hdr.err_code = err_code;
p_data->msg.hdr.err_param = seid;
avdt_msg_send_rej(p_ccb, AVDT_SIG_SUSPEND, &p_data->msg);
}
}
/*******************************************************************************
*
* Function avdt_ccb_hdl_suspend_rsp
*
* Description This function is called when a suspend response or reject
* is received from the peer. Using the SEIDs stored in the
* current command message, it sends a suspend response or
* suspend reject event to each SCB associated with the
* command.
*
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_hdl_suspend_rsp(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
uint8_t event;
int i;
uint8_t* p;
AvdtpScb* p_scb;
/* determine rsp or rej event */
event = (p_data->msg.hdr.err_code == 0) ? AVDT_SCB_MSG_SUSPEND_RSP_EVT
: AVDT_SCB_MSG_SUSPEND_REJ_EVT;
/* get to where seid's are stashed in current cmd */
p = (uint8_t*)(p_ccb->p_curr_cmd + 1);
/* little trick here; length of current command equals number of streams */
for (i = 0; i < p_ccb->p_curr_cmd->len; i++) {
p_scb = avdt_scb_by_hdl(p[i]);
if (p_scb != NULL) {
avdt_scb_event(p_scb, event, (tAVDT_SCB_EVT*)&p_data->msg);
}
}
}
/*******************************************************************************
*
* Function avdt_ccb_snd_discover_cmd
*
* Description This function is called to send a discover command to the
* peer. It copies variables needed for the procedure from
* the event to the CCB. It marks the CCB as busy and then
* sends a discover command.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_snd_discover_cmd(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
/* store info in ccb struct */
p_ccb->p_proc_data = p_data->discover.p_sep_info;
p_ccb->proc_cback = p_data->discover.p_cback;
p_ccb->proc_param = p_data->discover.num_seps;
/* we're busy */
p_ccb->proc_busy = true;
/* build and queue discover req */
avdt_msg_send_cmd(p_ccb, NULL, AVDT_SIG_DISCOVER, NULL);
}
/*******************************************************************************
*
* Function avdt_ccb_snd_discover_rsp
*
* Description This function is called to send a discover response to
* the peer. It takes the stream information passed in the
* event and sends a discover response.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_snd_discover_rsp(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
/* send response */
avdt_msg_send_rsp(p_ccb, AVDT_SIG_DISCOVER, &p_data->msg);
}
/*******************************************************************************
*
* Function avdt_ccb_snd_getcap_cmd
*
* Description This function is called to send a get capabilities command
* to the peer. It copies variables needed for the procedure
* from the event to the CCB. It marks the CCB as busy and
* then sends a get capabilities command.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_snd_getcap_cmd(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
uint8_t sig_id = AVDT_SIG_GETCAP;
/* store info in ccb struct */
p_ccb->p_proc_data = p_data->getcap.p_cfg;
p_ccb->proc_cback = p_data->getcap.p_cback;
/* we're busy */
p_ccb->proc_busy = true;
/* build and queue discover req */
if (p_data->msg.hdr.sig_id == AVDT_SIG_GET_ALLCAP)
sig_id = AVDT_SIG_GET_ALLCAP;
avdt_msg_send_cmd(p_ccb, NULL, sig_id, (tAVDT_MSG*)&p_data->getcap.single);
}
/*******************************************************************************
*
* Function avdt_ccb_snd_getcap_rsp
*
* Description This function is called to send a get capabilities response
* to the peer. It takes the stream information passed in the
* event and sends a get capabilities response.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_snd_getcap_rsp(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
uint8_t sig_id = AVDT_SIG_GETCAP;
if (p_data->msg.hdr.sig_id == AVDT_SIG_GET_ALLCAP)
sig_id = AVDT_SIG_GET_ALLCAP;
/* send response */
avdt_msg_send_rsp(p_ccb, sig_id, &p_data->msg);
}
/*******************************************************************************
*
* Function avdt_ccb_snd_start_cmd
*
* Description This function is called to send a start command to the
* peer. It verifies that all requested streams are in the
* proper state. If so, it sends a start command. Otherwise
* send ourselves back a start reject.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_snd_start_cmd(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
int i;
AvdtpScb* p_scb;
tAVDT_MSG avdt_msg;
uint8_t seid_list[AVDT_NUM_SEPS];
AVDT_TRACE_DEBUG("%s", __func__);
/* make copy of our seid list */
memcpy(seid_list, p_data->msg.multi.seid_list, p_data->msg.multi.num_seps);
/* verify all streams in the right state */
avdt_msg.hdr.err_param =
avdt_scb_verify(p_ccb, AVDT_VERIFY_OPEN, p_data->msg.multi.seid_list,
p_data->msg.multi.num_seps, &avdt_msg.hdr.err_code);
if (avdt_msg.hdr.err_param == 0) {
AVDT_TRACE_DEBUG("%s: AVDT_SIG_START", __func__);
/* set peer seid list in messsage */
avdt_scb_peer_seid_list(&p_data->msg.multi);
/* send command */
avdt_msg_send_cmd(p_ccb, seid_list, AVDT_SIG_START, &p_data->msg);
} else {
/* failed; send ourselves a reject for each stream */
for (i = 0; i < p_data->msg.multi.num_seps; i++) {
p_scb = avdt_scb_by_hdl(seid_list[i]);
if (p_scb != NULL) {
AVDT_TRACE_DEBUG("%s: AVDT_SCB_MSG_START_REJ_EVT: i=%d", __func__, i);
tAVDT_SCB_EVT avdt_scb_evt;
avdt_scb_evt.msg.hdr = avdt_msg.hdr;
avdt_scb_event(p_scb, AVDT_SCB_MSG_START_REJ_EVT, &avdt_scb_evt);
}
}
}
}
/*******************************************************************************
*
* Function avdt_ccb_snd_start_rsp
*
* Description This function is called to send a start response to the
* peer. It takes the stream information passed in the event
* and sends a start response. Then it sends a start event
* to the SCB for each stream.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_snd_start_rsp(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
AvdtpScb* p_scb;
int i;
/* send response message */
avdt_msg_send_rsp(p_ccb, AVDT_SIG_START, &p_data->msg);
/* send start event to each scb */
for (i = 0; i < p_data->msg.multi.num_seps; i++) {
p_scb = avdt_scb_by_hdl(p_data->msg.multi.seid_list[i]);
if (p_scb != NULL) {
avdt_scb_event(p_scb, AVDT_SCB_MSG_START_CMD_EVT, NULL);
}
}
}
/*******************************************************************************
*
* Function avdt_ccb_snd_suspend_cmd
*
* Description This function is called to send a suspend command to the
* peer. It verifies that all requested streams are in the
* proper state. If so, it sends a suspend command.
* Otherwise it calls the callback function for each requested
* stream and sends a suspend confirmation with failure.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_snd_suspend_cmd(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
int i;
AvdtpScb* p_scb;
tAVDT_MSG avdt_msg;
uint8_t seid_list[AVDT_NUM_SEPS];
/* make copy of our seid list */
memcpy(seid_list, p_data->msg.multi.seid_list, p_data->msg.multi.num_seps);
/* verify all streams in the right state */
avdt_msg.hdr.err_param =
avdt_scb_verify(p_ccb, AVDT_VERIFY_STREAMING, p_data->msg.multi.seid_list,
p_data->msg.multi.num_seps, &avdt_msg.hdr.err_code);
if (avdt_msg.hdr.err_param == 0) {
/* set peer seid list in messsage */
avdt_scb_peer_seid_list(&p_data->msg.multi);
/* send command */
avdt_msg_send_cmd(p_ccb, seid_list, AVDT_SIG_SUSPEND, &p_data->msg);
} else {
/* failed; send ourselves a reject for each stream */
for (i = 0; i < p_data->msg.multi.num_seps; i++) {
p_scb = avdt_scb_by_hdl(seid_list[i]);
if (p_scb != NULL) {
tAVDT_SCB_EVT avdt_scb_evt;
avdt_scb_evt.msg.hdr = avdt_msg.hdr;
avdt_scb_event(p_scb, AVDT_SCB_MSG_SUSPEND_REJ_EVT, &avdt_scb_evt);
}
}
}
}
/*******************************************************************************
*
* Function avdt_ccb_snd_suspend_rsp
*
* Description This function is called to send a suspend response to the
* peer. It takes the stream information passed in the event
* and sends a suspend response. Then it sends a suspend event
* to the SCB for each stream.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_snd_suspend_rsp(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
AvdtpScb* p_scb;
int i;
/* send response message */
avdt_msg_send_rsp(p_ccb, AVDT_SIG_SUSPEND, &p_data->msg);
/* send start event to each scb */
for (i = 0; i < p_data->msg.multi.num_seps; i++) {
p_scb = avdt_scb_by_hdl(p_data->msg.multi.seid_list[i]);
if (p_scb != NULL) {
avdt_scb_event(p_scb, AVDT_SCB_MSG_SUSPEND_CMD_EVT, NULL);
}
}
}
/*******************************************************************************
*
* Function avdt_ccb_clear_cmds
*
* Description This function is called when the signaling channel is
* closed to clean up any pending commands. For each pending
* command in the command queue, it frees the command and
* calls the application callback function indicating failure.
* Certain CCB variables are also initialized.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_clear_cmds(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
int i;
AvdtpScb* p_scb = &(p_ccb->scb[0]);
uint8_t err_code = AVDT_ERR_CONNECT;
/* clear the ccb */
avdt_ccb_clear_ccb(p_ccb);
/* clear out command queue; this is a little tricky here; we need
** to handle the case where there is a command on deck in p_curr_cmd,
** plus we need to clear out the queue
*/
do {
/* we know p_curr_cmd = NULL after this */
tAVDT_CCB_EVT avdt_ccb_evt;
avdt_ccb_evt.err_code = err_code;
avdt_ccb_cmd_fail(p_ccb, &avdt_ccb_evt);
/* set up next message */
p_ccb->p_curr_cmd = (BT_HDR*)fixed_queue_try_dequeue(p_ccb->cmd_q);
} while (p_ccb->p_curr_cmd != NULL);
/* send a CC_CLOSE_EVT any active scbs associated with this ccb */
for (i = 0; i < AVDT_NUM_SEPS; i++, p_scb++) {
if ((p_scb->allocated) && (p_scb->p_ccb == p_ccb)) {
avdt_scb_event(p_scb, AVDT_SCB_CC_CLOSE_EVT, NULL);
}
}
}
/*******************************************************************************
*
* Function avdt_ccb_cmd_fail
*
* Description This function is called when there is a response timeout.
* The currently pending command is freed and we fake a
* reject message back to ourselves.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_cmd_fail(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
tAVDT_MSG msg;
uint8_t evt;
AvdtpScb* p_scb;
if (p_ccb->p_curr_cmd != NULL) {
/* set up data */
msg.hdr.err_code = p_data->err_code;
msg.hdr.err_param = 0;
msg.hdr.ccb_idx = avdt_ccb_to_idx(p_ccb);
/* pretend that we received a rej message */
evt = avdt_msg_rej_2_evt[p_ccb->p_curr_cmd->event - 1];
if (evt & AVDT_CCB_MKR) {
tAVDT_CCB_EVT avdt_ccb_evt;
avdt_ccb_evt.msg = msg;
avdt_ccb_event(p_ccb, (uint8_t)(evt & ~AVDT_CCB_MKR), &avdt_ccb_evt);
} else {
/* we get the scb out of the current cmd */
p_scb = avdt_scb_by_hdl(*((uint8_t*)(p_ccb->p_curr_cmd + 1)));
if (p_scb != NULL) {
tAVDT_SCB_EVT avdt_scb_evt;
avdt_scb_evt.msg = msg;
avdt_scb_event(p_scb, evt, &avdt_scb_evt);
}
}
osi_free_and_reset((void**)&p_ccb->p_curr_cmd);
}
}
/*******************************************************************************
*
* Function avdt_ccb_free_cmd
*
* Description This function is called when a response is received for a
* currently pending command. The command is freed.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_free_cmd(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
osi_free_and_reset((void**)&p_ccb->p_curr_cmd);
}
/*******************************************************************************
*
* Function avdt_ccb_cong_state
*
* Description This function is called to set the congestion state for
* the CCB.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_cong_state(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
p_ccb->cong = p_data->llcong;
}
/*******************************************************************************
*
* Function avdt_ccb_ret_cmd
*
* Description This function is called to retransmit the currently
* pending command. The retransmission count is incremented.
* If the count reaches the maximum number of retransmissions,
* the event is treated as a response timeout.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_ret_cmd(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
p_ccb->ret_count++;
if (p_ccb->ret_count == AVDT_RET_MAX) {
/* command failed */
p_ccb->ret_count = 0;
tAVDT_CCB_EVT avdt_ccb_evt;
avdt_ccb_evt.err_code = AVDT_ERR_TIMEOUT;
avdt_ccb_cmd_fail(p_ccb, &avdt_ccb_evt);
/* go to next queued command */
avdt_ccb_snd_cmd(p_ccb, p_data);
} else {
/* if command pending and we're not congested and not sending a fragment */
if ((!p_ccb->cong) && (p_ccb->p_curr_msg == NULL) &&
(p_ccb->p_curr_cmd != NULL)) {
/* make copy of message in p_curr_cmd and send it */
BT_HDR* p_msg = (BT_HDR*)osi_malloc(AVDT_CMD_BUF_SIZE);
memcpy(p_msg, p_ccb->p_curr_cmd,
(sizeof(BT_HDR) + p_ccb->p_curr_cmd->offset +
p_ccb->p_curr_cmd->len));
avdt_msg_send(p_ccb, p_msg);
}
/* restart ret timer */
alarm_cancel(p_ccb->idle_ccb_timer);
alarm_cancel(p_ccb->rsp_ccb_timer);
uint64_t interval_ms = avdtp_cb.rcb.ret_tout * 1000;
alarm_set_on_mloop(p_ccb->ret_ccb_timer, interval_ms,
avdt_ccb_ret_ccb_timer_timeout, p_ccb);
}
}
/*******************************************************************************
*
* Function avdt_ccb_snd_cmd
*
* Description This function is called the send the next command,
* if any, in the command queue.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_snd_cmd(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
BT_HDR* p_msg;
/* do we have commands to send? send next command; make sure we're clear;
** not congested, not sending fragment, not waiting for response
*/
if ((!p_ccb->cong) && (p_ccb->p_curr_msg == NULL) &&
(p_ccb->p_curr_cmd == NULL)) {
p_msg = (BT_HDR*)fixed_queue_try_dequeue(p_ccb->cmd_q);
if (p_msg != NULL) {
/* make a copy of buffer in p_curr_cmd */
p_ccb->p_curr_cmd = (BT_HDR*)osi_malloc(AVDT_CMD_BUF_SIZE);
memcpy(p_ccb->p_curr_cmd, p_msg,
(sizeof(BT_HDR) + p_msg->offset + p_msg->len));
avdt_msg_send(p_ccb, p_msg);
}
}
}
/*******************************************************************************
*
* Function avdt_ccb_snd_msg
*
* Description
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_snd_msg(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
BT_HDR* p_msg;
/* if not congested */
if (!p_ccb->cong) {
/* are we sending a fragmented message? continue sending fragment */
if (p_ccb->p_curr_msg != NULL) {
avdt_msg_send(p_ccb, NULL);
}
/* do we have responses to send? send them */
else if (!fixed_queue_is_empty(p_ccb->rsp_q)) {
while ((p_msg = (BT_HDR*)fixed_queue_try_dequeue(p_ccb->rsp_q)) != NULL) {
if (avdt_msg_send(p_ccb, p_msg)) {
/* break out if congested */
break;
}
}
}
/* do we have commands to send? send next command */
avdt_ccb_snd_cmd(p_ccb, NULL);
}
}
/*******************************************************************************
*
* Function avdt_ccb_set_reconn
*
* Description This function is called to enable a reconnect attempt when
* a channel transitions from closing to idle state. It sets
* the reconn variable to true.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_set_reconn(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
p_ccb->reconn = true;
}
/*******************************************************************************
*
* Function avdt_ccb_clr_reconn
*
* Description This function is called to clear the reconn variable.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_clr_reconn(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
p_ccb->reconn = false;
}
/*******************************************************************************
*
* Function avdt_ccb_chk_reconn
*
* Description This function is called to check if a reconnect attempt
* is enabled. If enabled, it sends an AVDT_CCB_UL_OPEN_EVT
* to the CCB. If disabled, the CCB is deallocated.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_chk_reconn(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
if (p_ccb->reconn) {
p_ccb->reconn = false;
/* clear out ccb */
avdt_ccb_clear_ccb(p_ccb);
/* clear out current command, if any */
uint8_t err_code = AVDT_ERR_CONNECT;
tAVDT_CCB_EVT avdt_ccb_evt;
avdt_ccb_evt.err_code = err_code;
avdt_ccb_cmd_fail(p_ccb, &avdt_ccb_evt);
/* reopen the signaling channel */
avdt_ccb_event(p_ccb, AVDT_CCB_UL_OPEN_EVT, NULL);
} else {
avdt_ccb_ll_closed(p_ccb, NULL);
}
}
/*******************************************************************************
*
* Function avdt_ccb_chk_timer
*
* Description This function stops the CCB timer if the idle timer is
* running.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_chk_timer(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
alarm_cancel(p_ccb->idle_ccb_timer);
}
/*******************************************************************************
*
* Function avdt_ccb_set_conn
*
* Description Set CCB variables associated with AVDT_ConnectReq().
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_set_conn(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
/* save callback */
p_ccb->p_conn_cback = p_data->connect.p_cback;
/* set security level */
BTM_SetSecurityLevel(true, "", BTM_SEC_SERVICE_AVDTP,
p_data->connect.sec_mask, AVDT_PSM, BTM_SEC_PROTO_AVDT,
AVDT_CHAN_SIG);
}
/*******************************************************************************
*
* Function avdt_ccb_set_disconn
*
* Description Set CCB variables associated with AVDT_DisconnectReq().
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_set_disconn(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
/*
AVDT_TRACE_EVENT("avdt_ccb_set_disconn:conn:x%x, api:x%x",
p_ccb->p_conn_cback, p_data->disconnect.p_cback);
*/
/* save callback */
if (p_data->disconnect.p_cback)
p_ccb->p_conn_cback = p_data->disconnect.p_cback;
}
/*******************************************************************************
*
* Function avdt_ccb_do_disconn
*
* Description Do action associated with AVDT_DisconnectReq().
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_do_disconn(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
/* clear any pending commands */
avdt_ccb_clear_cmds(p_ccb, NULL);
/* close channel */
avdt_ccb_chan_close(p_ccb, NULL);
}
/*******************************************************************************
*
* Function avdt_ccb_ll_closed
*
* Description Clear commands from and deallocate CCB.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_ll_closed(AvdtpCcb* p_ccb, UNUSED_ATTR tAVDT_CCB_EVT* p_data) {
tAVDT_CTRL_CBACK* p_cback;
tAVDT_CTRL avdt_ctrl;
AVDT_TRACE_DEBUG("%s peer %s", __func__, p_ccb->peer_addr.ToString().c_str());
/* clear any pending commands */
avdt_ccb_clear_cmds(p_ccb, NULL);
/* save callback pointer, bd addr */
p_cback = p_ccb->p_conn_cback;
if (!p_cback) p_cback = avdtp_cb.p_conn_cback;
RawAddress bd_addr = p_ccb->peer_addr;
uint8_t bta_av_scb_index = p_ccb->BtaAvScbIndex();
/* dealloc ccb */
avdt_ccb_dealloc(p_ccb, NULL);
/* call callback */
if (p_cback) {
avdt_ctrl.hdr.err_code = 0;
(*p_cback)(0, bd_addr, AVDT_DISCONNECT_IND_EVT, &avdt_ctrl,
bta_av_scb_index);
}
}
/*******************************************************************************
*
* Function avdt_ccb_ll_opened
*
* Description Call callback on open.
*
*
* Returns void.
*
******************************************************************************/
void avdt_ccb_ll_opened(AvdtpCcb* p_ccb, tAVDT_CCB_EVT* p_data) {
tAVDT_CTRL avdt_ctrl;
AVDT_TRACE_DEBUG("%s peer %s BtaAvScbIndex=%d p_ccb=%p", __func__,
p_ccb->peer_addr.ToString().c_str(), p_ccb->BtaAvScbIndex(),
p_ccb);
p_ccb->ll_opened = true;
if (!p_ccb->p_conn_cback) p_ccb->p_conn_cback = avdtp_cb.p_conn_cback;
/* call callback */
if (p_ccb->p_conn_cback) {
avdt_ctrl.hdr.err_code = 0;
avdt_ctrl.hdr.err_param = p_data->msg.hdr.err_param;
(*p_ccb->p_conn_cback)(0, p_ccb->peer_addr, AVDT_CONNECT_IND_EVT,
&avdt_ctrl, p_ccb->BtaAvScbIndex());
}
}