/*******************************************************************************
**
** 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(tAVDT_CCB *p_ccb, tAVDT_CCB_EVT *p_data)
{
tAVDT_MSG msg;
UINT8 evt;
tAVDT_SCB *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)
{
avdt_ccb_event(p_ccb, (UINT8) (evt & ~AVDT_CCB_MKR), (tAVDT_CCB_EVT *) &msg);
}
else
{
/* we get the scb out of the current cmd */
p_scb = avdt_scb_by_hdl(*((UINT8 *)(p_ccb->p_curr_cmd + 1)));
if (p_scb != NULL)
{
avdt_scb_event(p_scb, evt, (tAVDT_SCB_EVT *) &msg);
}
}
GKI_freebuf(p_ccb->p_curr_cmd);
p_ccb->p_curr_cmd = NULL;
}
}
/*******************************************************************************
**
** 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(tAVDT_CCB *p_ccb, tAVDT_CCB_EVT *p_data)
{
tAVDT_SEP_INFO sep_info[AVDT_NUM_SEPS];
tAVDT_SCB *p_scb = &avdt_cb.scb[0];
int i;
p_data->msg.discover_rsp.p_sep_info = sep_info;
p_data->msg.discover_rsp.num_seps = 0;
/* for all allocated scbs */
for (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 = i + 1;
sep_info[p_data->msg.discover_rsp.num_seps].media_type = p_scb->cs.media_type;
sep_info[p_data->msg.discover_rsp.num_seps].tsep = p_scb->cs.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_ConnectReq
**
** Description This function initiates an AVDTP signaling connection
** to the peer device. When the connection is completed, an
** AVDT_CONNECT_IND_EVT is sent to the application via its
** control callback function. If the connection attempt fails
** an AVDT_DISCONNECT_IND_EVT is sent. The security mask
** parameter overrides the outgoing security mask set in
** AVDT_Register().
**
** Returns AVDT_SUCCESS if successful, otherwise error.
**
*******************************************************************************/
UINT16 AVDT_ConnectReq(BD_ADDR bd_addr, UINT8 sec_mask, tAVDT_CTRL_CBACK *p_cback)
{
tAVDT_CCB *p_ccb = NULL;
UINT16 result = AVDT_SUCCESS;
tAVDT_CCB_EVT evt;
/* find channel control block for this bd addr; if none, allocate one */
if ((p_ccb = avdt_ccb_by_bd(bd_addr)) == NULL) {
if ((p_ccb = avdt_ccb_alloc(bd_addr)) == NULL) {
/* could not allocate channel control block */
result = AVDT_NO_RESOURCES;
}
} else if (p_ccb->ll_opened == FALSE) {
AVDT_TRACE_WARNING("AVDT_ConnectReq: CCB LL is in the middle of opening");
/* ccb was already allocated for the incoming signalling. */
result = AVDT_BUSY;
}
if (result == AVDT_SUCCESS) {
/* send event to ccb */
evt.connect.p_cback = p_cback;
evt.connect.sec_mask = sec_mask;
avdt_ccb_event(p_ccb, AVDT_CCB_API_CONNECT_REQ_EVT, &evt);
}
return result;
}
/*******************************************************************************
**
** Function avdt_ad_tc_close_ind
**
** Description This function is called by the L2CAP interface when the
** L2CAP channel is closed. It looks up the CCB or SCB for
** the channel and sends it a close event. The reason
** parameter is the same value passed by the L2CAP
** callback function.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avdt_ad_tc_close_ind(tAVDT_TC_TBL *p_tbl, UINT16 reason)
{
tAVDT_CCB *p_ccb;
tAVDT_SCB *p_scb;
tAVDT_SCB_TC_CLOSE close;
// UNUSED(reason);
close.old_tc_state = p_tbl->state;
/* clear avdt_ad_tc_tbl entry */
p_tbl->state = AVDT_AD_ST_UNUSED;
p_tbl->cfg_flags = 0;
p_tbl->peer_mtu = L2CAP_DEFAULT_MTU;
AVDT_TRACE_DEBUG("avdt_ad_tc_close_ind tcid: %d, old: %d\n",
p_tbl->tcid, close.old_tc_state);
/* if signaling channel, notify ccb that channel open */
if (p_tbl->tcid == 0) {
p_ccb = avdt_ccb_by_idx(p_tbl->ccb_idx);
p_ccb->disc_rsn = (reason == AVDT_DISC_RSN_ABNORMAL) ? AVDT_DISC_RSN_ABNORMAL : AVDT_DISC_RSN_NORMAL;
avdt_ccb_event(p_ccb, AVDT_CCB_LL_CLOSE_EVT, NULL);
}
/* if media or other channel, notify scb that channel close */
else {
/* look up scb in stream routing table by ccb, tcid */
p_scb = avdt_scb_by_hdl(avdt_cb.ad.rt_tbl[p_tbl->ccb_idx][p_tbl->tcid].scb_hdl);
if (p_scb != NULL) {
close.tcid = p_tbl->tcid;
close.type = avdt_ad_tcid_to_type(p_tbl->tcid);
close.disc_rsn = (reason == AVDT_DISC_RSN_ABNORMAL) ? AVDT_DISC_RSN_ABNORMAL : AVDT_DISC_RSN_NORMAL;
avdt_scb_event(p_scb, AVDT_SCB_TC_CLOSE_EVT, (tAVDT_SCB_EVT *)&close);
}
}
}
/*******************************************************************************
**
** Function AVDT_SuspendReq
**
** Description Suspend one or more stream endpoints. This suspends the
** transfer of media packets for the streams. All stream
** endpoints must previously be open and started. When the
** streams are suspended, an AVDT_SUSPEND_CFM_EVT is sent to
** the application via the control callback function for
** each stream.
**
**
** Returns AVDT_SUCCESS if successful, otherwise error.
**
*******************************************************************************/
UINT16 AVDT_SuspendReq(UINT8 *p_handles, UINT8 num_handles)
{
tAVDT_SCB *p_scb = NULL;
tAVDT_CCB_EVT evt;
UINT16 result = AVDT_SUCCESS;
int i;
if ((num_handles == 0) || (num_handles > AVDT_NUM_SEPS)) {
result = AVDT_BAD_PARAMS;
} else {
/* verify handles */
for (i = 0; i < num_handles; i++) {
if ((p_scb = avdt_scb_by_hdl(p_handles[i])) == NULL) {
result = AVDT_BAD_HANDLE;
break;
}
}
}
if (result == AVDT_SUCCESS) {
if (p_scb->p_ccb == NULL) {
result = AVDT_BAD_HANDLE;
} else {
/* send event to ccb */
memcpy(evt.msg.multi.seid_list, p_handles, num_handles);
evt.msg.multi.num_seps = num_handles;
avdt_ccb_event(p_scb->p_ccb, AVDT_CCB_API_SUSPEND_REQ_EVT, &evt);
}
}
return result;
}
/*******************************************************************************
**
** Function avdt_process_timeout
**
** Description This function is called by BTU when an AVDTP timer
** expires. The function sends a timer event to the
** appropriate CCB or SCB state machine.
**
** This function is for use internal to the stack only.
**
**
** Returns void
**
*******************************************************************************/
void avdt_process_timeout(TIMER_LIST_ENT *p_tle)
{
UINT8 event = 0;
UINT8 err_code = AVDT_ERR_TIMEOUT;
switch (p_tle->event) {
case BTU_TTYPE_AVDT_CCB_RET:
event = AVDT_CCB_RET_TOUT_EVT + AVDT_CCB_MKR;
break;
case BTU_TTYPE_AVDT_CCB_RSP:
event = AVDT_CCB_RSP_TOUT_EVT + AVDT_CCB_MKR;
break;
case BTU_TTYPE_AVDT_CCB_IDLE:
event = AVDT_CCB_IDLE_TOUT_EVT + AVDT_CCB_MKR;
break;
case BTU_TTYPE_AVDT_SCB_TC:
event = AVDT_SCB_TC_TOUT_EVT;
break;
default:
break;
}
if (event & AVDT_CCB_MKR) {
avdt_ccb_event((tAVDT_CCB *) p_tle->param, (UINT8) (event & ~AVDT_CCB_MKR),
(tAVDT_CCB_EVT *) &err_code);
} else {
avdt_scb_event((tAVDT_SCB *) p_tle->param, event, NULL);
}
}
/*******************************************************************************
**
** Function avdt_get_cap_req
**
** Description internal function to serve both AVDT_GetCapReq and
** AVDT_GetAllCapReq
**
** Returns AVDT_SUCCESS if successful, otherwise error.
**
*******************************************************************************/
static UINT16 avdt_get_cap_req(BD_ADDR bd_addr, tAVDT_CCB_API_GETCAP *p_evt)
{
tAVDT_CCB *p_ccb = NULL;
UINT16 result = AVDT_SUCCESS;
/* verify SEID */
if ((p_evt->single.seid < AVDT_SEID_MIN) || (p_evt->single.seid > AVDT_SEID_MAX)) {
AVDT_TRACE_ERROR("seid: %d\n", p_evt->single.seid);
result = AVDT_BAD_PARAMS;
}
/* find channel control block for this bd addr; if none, allocate one */
else if ((p_ccb = avdt_ccb_by_bd(bd_addr)) == NULL) {
if ((p_ccb = avdt_ccb_alloc(bd_addr)) == NULL) {
/* could not allocate channel control block */
result = AVDT_NO_RESOURCES;
}
}
if (result == AVDT_SUCCESS) {
/* make sure no discovery or get capabilities req already in progress */
if (p_ccb->proc_busy) {
result = AVDT_BUSY;
}
/* send event to ccb */
else {
avdt_ccb_event(p_ccb, AVDT_CCB_API_GETCAP_REQ_EVT, (tAVDT_CCB_EVT *)p_evt);
}
}
return result;
}
/*******************************************************************************
**
** Function AVDT_DiscoverReq
**
** Description This function initiates a connection to the AVDTP service
** on the peer device, if not already present, and discovers
** the stream endpoints on the peer device. (Please note
** that AVDTP discovery is unrelated to SDP discovery).
** This function can be called at any time regardless of whether
** there is an AVDTP connection to the peer device.
**
** When discovery is complete, an AVDT_DISCOVER_CFM_EVT
** is sent to the application via its callback function.
** The application must not call AVDT_GetCapReq() or
** AVDT_DiscoverReq() again to the same device until
** discovery is complete.
**
** The memory addressed by sep_info is allocated by the
** application. This memory is written to by AVDTP as part
** of the discovery procedure. This memory must remain
** accessible until the application receives the
** AVDT_DISCOVER_CFM_EVT.
**
** Returns AVDT_SUCCESS if successful, otherwise error.
**
*******************************************************************************/
UINT16 AVDT_DiscoverReq(BD_ADDR bd_addr, tAVDT_SEP_INFO *p_sep_info,
UINT8 max_seps, tAVDT_CTRL_CBACK *p_cback)
{
tAVDT_CCB *p_ccb;
UINT16 result = AVDT_SUCCESS;
tAVDT_CCB_EVT evt;
/* find channel control block for this bd addr; if none, allocate one */
if ((p_ccb = avdt_ccb_by_bd(bd_addr)) == NULL) {
if ((p_ccb = avdt_ccb_alloc(bd_addr)) == NULL) {
/* could not allocate channel control block */
result = AVDT_NO_RESOURCES;
}
}
if (result == AVDT_SUCCESS) {
/* make sure no discovery or get capabilities req already in progress */
if (p_ccb->proc_busy) {
result = AVDT_BUSY;
}
/* send event to ccb */
else {
evt.discover.p_sep_info = p_sep_info;
evt.discover.num_seps = max_seps;
evt.discover.p_cback = p_cback;
avdt_ccb_event(p_ccb, AVDT_CCB_API_DISCOVER_REQ_EVT, &evt);
}
}
return result;
}
/*******************************************************************************
**
** 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(tAVDT_CCB *p_ccb, tAVDT_CCB_EVT *p_data)
{
tAVDT_SCB *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->cs.cfg;
avdt_ccb_event(p_ccb, AVDT_CCB_API_GETCAP_RSP_EVT, p_data);
}
/*******************************************************************************
**
** 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(tAVDT_CCB *p_ccb, tAVDT_CCB_EVT *p_data)
{
UINT8 err_code = 0;
/* verify all streams in the right state */
UINT8 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_DisconnectReq
**
** Description This function disconnect an AVDTP signaling connection
** to the peer device. When disconnected an
** AVDT_DISCONNECT_IND_EVT is sent to the application via its
** control callback function.
**
** Returns AVDT_SUCCESS if successful, otherwise error.
**
*******************************************************************************/
UINT16 AVDT_DisconnectReq(BD_ADDR bd_addr, tAVDT_CTRL_CBACK *p_cback)
{
tAVDT_CCB *p_ccb = NULL;
UINT16 result = AVDT_SUCCESS;
tAVDT_CCB_EVT evt;
/* find channel control block for this bd addr; if none, error */
if ((p_ccb = avdt_ccb_by_bd(bd_addr)) == NULL) {
result = AVDT_BAD_PARAMS;
}
if (result == AVDT_SUCCESS) {
/* send event to ccb */
evt.disconnect.p_cback = p_cback;
avdt_ccb_event(p_ccb, AVDT_CCB_API_DISCONNECT_REQ_EVT, &evt);
}
return result;
}
/*******************************************************************************
**
** Function avdt_ad_tc_cong_ind
**
** Description This function is called by the L2CAP interface layer when
** L2CAP calls the congestion callback. It looks up the CCB
** or SCB for the channel and sends it a congestion event.
** The is_congested parameter is the same value passed by
** the L2CAP callback function.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avdt_ad_tc_cong_ind(tAVDT_TC_TBL *p_tbl, BOOLEAN is_congested)
{
tAVDT_CCB *p_ccb;
tAVDT_SCB *p_scb;
/* if signaling channel, notify ccb of congestion */
if (p_tbl->tcid == 0) {
p_ccb = avdt_ccb_by_idx(p_tbl->ccb_idx);
avdt_ccb_event(p_ccb, AVDT_CCB_LL_CONG_EVT, (tAVDT_CCB_EVT *) &is_congested);
}
/* if media or other channel, notify scb that channel open */
else {
/* look up scb in stream routing table by ccb, tcid */
p_scb = avdt_scb_by_hdl(avdt_cb.ad.rt_tbl[p_tbl->ccb_idx][p_tbl->tcid].scb_hdl);
if (p_scb != NULL) {
avdt_scb_event(p_scb, AVDT_SCB_TC_CONG_EVT, (tAVDT_SCB_EVT *) &is_congested);
}
}
}
/*******************************************************************************
**
** 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(tAVDT_CCB *p_ccb, tAVDT_CCB_EVT *p_data)
{
UINT8 err_code = AVDT_ERR_CONNECT;
UNUSED(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 */
avdt_ccb_cmd_fail(p_ccb, (tAVDT_CCB_EVT *) &err_code);
/* 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_ad_tc_open_ind
**
** Description This function is called by the L2CAP interface when
** the L2CAP channel is opened. It looks up the CCB or SCB
** for the channel and sends it an open event.
**
**
** Returns Nothing.
**
*******************************************************************************/
void avdt_ad_tc_open_ind(tAVDT_TC_TBL *p_tbl)
{
tAVDT_CCB *p_ccb;
tAVDT_SCB *p_scb;
tAVDT_OPEN open;
tAVDT_EVT_HDR evt;
p_tbl->state = AVDT_AD_ST_OPEN;
/* if signaling channel, notify ccb that channel open */
if (p_tbl->tcid == 0) {
/* set the signal channel to use high priority within the ACL link */
L2CA_SetTxPriority(avdt_cb.ad.rt_tbl[p_tbl->ccb_idx][AVDT_CHAN_SIG].lcid, L2CAP_CHNL_PRIORITY_HIGH);
p_ccb = avdt_ccb_by_idx(p_tbl->ccb_idx);
/* use err_param to indicate the role of connection.
* AVDT_ACP, if ACP */
evt.err_param = AVDT_INT;
if (p_tbl->cfg_flags & AVDT_L2C_CFG_CONN_ACP) {
evt.err_param = AVDT_ACP;
}
avdt_ccb_event(p_ccb, AVDT_CCB_LL_OPEN_EVT, (tAVDT_CCB_EVT *)&evt);
}
/* if media or other channel, notify scb that channel open */
else {
/* look up scb in stream routing table by ccb, tcid */
p_scb = avdt_scb_by_hdl(avdt_cb.ad.rt_tbl[p_tbl->ccb_idx][p_tbl->tcid].scb_hdl);
/* put lcid in event data */
if (p_scb != NULL) {
open.peer_mtu = p_tbl->peer_mtu;
open.lcid = avdt_cb.ad.rt_tbl[p_tbl->ccb_idx][p_tbl->tcid].lcid;
open.hdr.err_code = avdt_ad_tcid_to_type(p_tbl->tcid);
avdt_scb_event(p_scb, AVDT_SCB_TC_OPEN_EVT, (tAVDT_SCB_EVT *) &open);
}
}
}
