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/******************************************************************************
*
* Copyright (C) 2003-2012 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 AVCTP module interfaces to L2CAP
*
******************************************************************************/
#include <string.h>
#include "stack/bt_types.h"
#include "common/bt_target.h"
#include "common/bt_defs.h"
#include "stack/avct_api.h"
#include "avct_int.h"
#include "stack/l2c_api.h"
#include "stack/l2cdefs.h"
#include "osi/allocator.h"
#if (defined(AVCT_INCLUDED) && AVCT_INCLUDED == TRUE)
/* Configuration flags. */
#define AVCT_L2C_CFG_IND_DONE (1<<0)
#define AVCT_L2C_CFG_CFM_DONE (1<<1)
/* callback function declarations */
void avct_l2c_connect_ind_cback(BD_ADDR bd_addr, UINT16 lcid, UINT16 psm, UINT8 id);
void avct_l2c_connect_cfm_cback(UINT16 lcid, UINT16 result);
void avct_l2c_config_cfm_cback(UINT16 lcid, tL2CAP_CFG_INFO *p_cfg);
void avct_l2c_config_ind_cback(UINT16 lcid, tL2CAP_CFG_INFO *p_cfg);
void avct_l2c_disconnect_ind_cback(UINT16 lcid, BOOLEAN ack_needed);
void avct_l2c_disconnect_cfm_cback(UINT16 lcid, UINT16 result);
void avct_l2c_congestion_ind_cback(UINT16 lcid, BOOLEAN is_congested);
void avct_l2c_data_ind_cback(UINT16 lcid, BT_HDR *p_buf);
/* L2CAP callback function structure */
const tL2CAP_APPL_INFO avct_l2c_appl = {
avct_l2c_connect_ind_cback,
avct_l2c_connect_cfm_cback,
NULL,
avct_l2c_config_ind_cback,
avct_l2c_config_cfm_cback,
avct_l2c_disconnect_ind_cback,
avct_l2c_disconnect_cfm_cback,
NULL,
avct_l2c_data_ind_cback,
avct_l2c_congestion_ind_cback,
NULL /* tL2CA_TX_COMPLETE_CB */
};
/*******************************************************************************
**
** Function avct_l2c_is_passive
**
** Description check is the CCB associated with the given LCB was created
** as passive
**
** Returns TRUE, if the given LCB is created as AVCT_PASSIVE
**
*******************************************************************************/
static BOOLEAN avct_l2c_is_passive (tAVCT_LCB *p_lcb)
{
BOOLEAN is_passive = FALSE;
tAVCT_CCB *p_ccb = &avct_cb.ccb[0];
int i;
for (i = 0; i < AVCT_NUM_CONN; i++, p_ccb++) {
if (p_ccb->allocated && (p_ccb->p_lcb == p_lcb)) {
AVCT_TRACE_DEBUG("avct_l2c_is_ct control:x%x", p_ccb->cc.control);
if (p_ccb->cc.control & AVCT_PASSIVE) {
is_passive = TRUE;
break;
}
}
}
return is_passive;
}
/*******************************************************************************
**
** Function avct_l2c_connect_ind_cback
**
** Description This is the L2CAP connect indication callback function.
**
**
** Returns void
**
*******************************************************************************/
void avct_l2c_connect_ind_cback(BD_ADDR bd_addr, UINT16 lcid, UINT16 psm, UINT8 id)
{
tAVCT_LCB *p_lcb;
UINT16 result = L2CAP_CONN_OK;
tL2CAP_CFG_INFO cfg;
UNUSED(psm);
/* do we already have a channel for this peer? */
if ((p_lcb = avct_lcb_by_bd(bd_addr)) == NULL) {
/* no, allocate lcb */
if ((p_lcb = avct_lcb_alloc(bd_addr)) == NULL) {
/* no ccb available, reject L2CAP connection */
result = L2CAP_CONN_NO_RESOURCES;
}
}
/* else we already have a channel for this peer */
else {
if (!avct_l2c_is_passive (p_lcb) || (p_lcb->ch_state == AVCT_CH_OPEN)) {
/* this LCB included CT role - reject */
result = L2CAP_CONN_NO_RESOURCES;
} else {
/* TG role only - accept the connection from CT. move the channel ID to the conflict list */
p_lcb->conflict_lcid = p_lcb->ch_lcid;
AVCT_TRACE_DEBUG("avct_l2c_connect_ind_cback conflict_lcid:0x%x", p_lcb->conflict_lcid);
}
}
if (p_lcb) {
AVCT_TRACE_DEBUG("avct_l2c_connect_ind_cback: 0x%x, res: %d, ch_state: %d",
lcid, result, p_lcb->ch_state);
}
/* Send L2CAP connect rsp */
L2CA_ConnectRsp(bd_addr, id, lcid, result, 0);
/* if result ok, proceed with connection */
if (result == L2CAP_CONN_OK) {
/* store LCID */
p_lcb->ch_lcid = lcid;
/* transition to configuration state */
p_lcb->ch_state = AVCT_CH_CFG;
/* Send L2CAP config req */
memset(&cfg, 0, sizeof(tL2CAP_CFG_INFO));
cfg.mtu_present = TRUE;
cfg.mtu = avct_cb.mtu;
L2CA_ConfigReq(lcid, &cfg);
AVCT_TRACE_DEBUG("avct_l2c snd Cfg Req");
}
#if (BT_USE_TRACES == TRUE)
if (p_lcb) {
AVCT_TRACE_DEBUG("ch_state cni: %d ", p_lcb->ch_state);
}
#endif
}
/*******************************************************************************
**
** Function avct_l2c_connect_cfm_cback
**
** Description This is the L2CAP connect confirm callback function.
**
**
** Returns void
**
*******************************************************************************/
void avct_l2c_connect_cfm_cback(UINT16 lcid, UINT16 result)
{
tAVCT_LCB *p_lcb;
tL2CAP_CFG_INFO cfg;
/* look up lcb for this channel */
if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) {
AVCT_TRACE_DEBUG("avct_l2c_connect_cfm_cback lcid:0x%x result: %d ch_state: %d, conflict_lcid:0x%x",
lcid, result, p_lcb->ch_state, p_lcb->conflict_lcid);
/* if in correct state */
if (p_lcb->ch_state == AVCT_CH_CONN) {
/* if result successful */
if (result == L2CAP_CONN_OK) {
/* set channel state */
p_lcb->ch_state = AVCT_CH_CFG;
/* Send L2CAP config req */
memset(&cfg, 0, sizeof(tL2CAP_CFG_INFO));
cfg.mtu_present = TRUE;
cfg.mtu = avct_cb.mtu;
L2CA_ConfigReq(lcid, &cfg);
AVCT_TRACE_DEBUG("avct_l2c snd Cfg Req");
}
/* else failure */
else {
AVCT_TRACE_DEBUG("avct_l2c_connect_cfm_cback conflict_lcid:0x%x", p_lcb->conflict_lcid);
if (p_lcb->conflict_lcid == lcid) {
p_lcb->conflict_lcid = 0;
} else {
avct_lcb_event(p_lcb, AVCT_LCB_LL_CLOSE_EVT, (tAVCT_LCB_EVT *) &result);
}
}
} else if (p_lcb->conflict_lcid == lcid) {
/* we must be in AVCT_CH_CFG state for the ch_lcid channel */
AVCT_TRACE_DEBUG("avct_l2c_connect_cfm_cback ch_state: %d, conflict_lcid:0x%x", p_lcb->ch_state, p_lcb->conflict_lcid);
if (result == L2CAP_CONN_OK) {
/* just in case the peer also accepts our connection - Send L2CAP disconnect req */
L2CA_DisconnectReq(lcid);
}
p_lcb->conflict_lcid = 0;
}
AVCT_TRACE_DEBUG("ch_state cnc: %d ", p_lcb->ch_state);
}
}
/*******************************************************************************
**
** Function avct_l2c_config_cfm_cback
**
** Description This is the L2CAP config confirm callback function.
**
**
** Returns void
**
*******************************************************************************/
void avct_l2c_config_cfm_cback(UINT16 lcid, tL2CAP_CFG_INFO *p_cfg)
{
tAVCT_LCB *p_lcb;
/* look up lcb for this channel */
if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) {
AVCT_TRACE_DEBUG("avct_l2c_config_cfm_cback: 0x%x, ch_state: %d, res: %d",
lcid, p_lcb->ch_state, p_cfg->result);
/* if in correct state */
if (p_lcb->ch_state == AVCT_CH_CFG) {
/* if result successful */
if (p_cfg->result == L2CAP_CFG_OK) {
/* update flags */
p_lcb->ch_flags |= AVCT_L2C_CFG_CFM_DONE;
/* if configuration complete */
if (p_lcb->ch_flags & AVCT_L2C_CFG_IND_DONE) {
p_lcb->ch_state = AVCT_CH_OPEN;
avct_lcb_event(p_lcb, AVCT_LCB_LL_OPEN_EVT, NULL);
}
}
/* else failure */
else {
AVCT_TRACE_DEBUG("ERROR avct_l2c_config_cfm_cback L2CA_DisconnectReq %d ", p_lcb->ch_state);
/* store result value */
p_lcb->ch_result = p_cfg->result;
/* Send L2CAP disconnect req */
L2CA_DisconnectReq(lcid);
}
}
AVCT_TRACE_DEBUG("ch_state cfc: %d ", p_lcb->ch_state);
}
}
/*******************************************************************************
**
** Function avct_l2c_config_ind_cback
**
** Description This is the L2CAP config indication callback function.
**
**
** Returns void
**
*******************************************************************************/
void avct_l2c_config_ind_cback(UINT16 lcid, tL2CAP_CFG_INFO *p_cfg)
{
tAVCT_LCB *p_lcb;
/* look up lcb for this channel */
if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) {
AVCT_TRACE_DEBUG("avct_l2c_config_ind_cback: 0x%x, ch_state: %d", lcid, p_lcb->ch_state);
/* store the mtu in tbl */
if (p_cfg->mtu_present) {
p_lcb->peer_mtu = p_cfg->mtu;
} else {
p_lcb->peer_mtu = L2CAP_DEFAULT_MTU;
}
/* send L2CAP configure response */
memset(p_cfg, 0, sizeof(tL2CAP_CFG_INFO));
p_cfg->result = L2CAP_CFG_OK;
L2CA_ConfigRsp(lcid, p_cfg);
/* if first config ind */
if ((p_lcb->ch_flags & AVCT_L2C_CFG_IND_DONE) == 0) {
/* update flags */
p_lcb->ch_flags |= AVCT_L2C_CFG_IND_DONE;
/* if configuration complete */
if (p_lcb->ch_flags & AVCT_L2C_CFG_CFM_DONE) {
p_lcb->ch_state = AVCT_CH_OPEN;
avct_lcb_event(p_lcb, AVCT_LCB_LL_OPEN_EVT, NULL);
}
}
AVCT_TRACE_DEBUG("ch_state cfi: %d ", p_lcb->ch_state);
}
}
/*******************************************************************************
**
** Function avct_l2c_disconnect_ind_cback
**
** Description This is the L2CAP disconnect indication callback function.
**
**
** Returns void
**
*******************************************************************************/
void avct_l2c_disconnect_ind_cback(UINT16 lcid, BOOLEAN ack_needed)
{
tAVCT_LCB *p_lcb;
UINT16 result = AVCT_RESULT_FAIL;
/* look up lcb for this channel */
if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) {
AVCT_TRACE_DEBUG("avct_l2c_disconnect_ind_cback: 0x%x, ch_state: %d", lcid, p_lcb->ch_state);
if (ack_needed) {
/* send L2CAP disconnect response */
L2CA_DisconnectRsp(lcid);
}
avct_lcb_event(p_lcb, AVCT_LCB_LL_CLOSE_EVT, (tAVCT_LCB_EVT *) &result);
AVCT_TRACE_DEBUG("ch_state di: %d ", p_lcb->ch_state);
}
}
/*******************************************************************************
**
** Function avct_l2c_disconnect_cfm_cback
**
** Description This is the L2CAP disconnect confirm callback function.
**
**
** Returns void
**
*******************************************************************************/
void avct_l2c_disconnect_cfm_cback(UINT16 lcid, UINT16 result)
{
tAVCT_LCB *p_lcb;
UINT16 res;
/* look up lcb for this channel */
if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) {
AVCT_TRACE_DEBUG("avct_l2c_disconnect_cfm_cback: 0x%x, ch_state: %d, res: %d",
lcid, p_lcb->ch_state, result);
/* result value may be previously stored */
res = (p_lcb->ch_result != 0) ? p_lcb->ch_result : result;
p_lcb->ch_result = 0;
avct_lcb_event(p_lcb, AVCT_LCB_LL_CLOSE_EVT, (tAVCT_LCB_EVT *) &res);
AVCT_TRACE_DEBUG("ch_state dc: %d ", p_lcb->ch_state);
}
}
/*******************************************************************************
**
** Function avct_l2c_congestion_ind_cback
**
** Description This is the L2CAP congestion indication callback function.
**
**
** Returns void
**
*******************************************************************************/
void avct_l2c_congestion_ind_cback(UINT16 lcid, BOOLEAN is_congested)
{
tAVCT_LCB *p_lcb;
AVCT_TRACE_DEBUG("avct_l2c_congestion_ind_cback: 0x%x", lcid);
/* look up lcb for this channel */
if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) {
avct_lcb_event(p_lcb, AVCT_LCB_LL_CONG_EVT, (tAVCT_LCB_EVT *) &is_congested);
}
}
/*******************************************************************************
**
** Function avct_l2c_data_ind_cback
**
** Description This is the L2CAP data indication callback function.
**
**
** Returns void
**
*******************************************************************************/
void avct_l2c_data_ind_cback(UINT16 lcid, BT_HDR *p_buf)
{
tAVCT_LCB *p_lcb;
AVCT_TRACE_DEBUG("avct_l2c_data_ind_cback: 0x%x", lcid);
/* look up lcb for this channel */
if ((p_lcb = avct_lcb_by_lcid(lcid)) != NULL) {
avct_lcb_event(p_lcb, AVCT_LCB_LL_MSG_EVT, (tAVCT_LCB_EVT *) &p_buf);
} else { /* prevent buffer leak */
AVCT_TRACE_WARNING("ERROR -> avct_l2c_data_ind_cback drop buffer");
osi_free(p_buf);
}
}
#endif /* #if (defined(AVCT_INCLUDED) && AVCT_INCLUDED == TRUE) */
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