/*******************************************************************************
**
** Function gatt_act_connect
**
** Description GATT connection initiation.
**
** Returns void.
**
*******************************************************************************/
BOOLEAN gatt_act_connect (tGATT_REG *p_reg, BD_ADDR bd_addr)
{
BOOLEAN ret = FALSE;
tGATT_TCB *p_tcb;
UINT8 st;
GATT_TRACE_DEBUG0("gatt_act_connect");
if ((p_tcb = gatt_find_tcb_by_addr(bd_addr)) != NULL)
{
ret = TRUE;
st = gatt_get_ch_state(p_tcb);
/* before link down, another app try to open a GATT connection */
if(st == GATT_CH_OPEN && gatt_num_apps_hold_link(p_tcb) == 0 &&
/* only connection on fix channel when the l2cap channel is already open */
p_tcb->att_lcid == L2CAP_ATT_CID )
{
if (!gatt_connect(bd_addr, p_tcb))
ret = FALSE;
}
else if(st == GATT_CH_CLOSING)
{
/* need to complete the closing first */
ret = FALSE;
}
}
else
{
if ((p_tcb = gatt_allocate_tcb_by_bdaddr(bd_addr)) != NULL)
{
if (!gatt_connect(bd_addr, p_tcb))
{
GATT_TRACE_ERROR0("gatt_connect failed");
memset(p_tcb, 0, sizeof(tGATT_TCB));
}
else
ret = TRUE;
}
else
{
ret = 0;
GATT_TRACE_ERROR1("Max TCB for gatt_if [%d] reached.", p_reg->gatt_if);
}
}
if (ret)
{
gatt_update_app_use_link_flag(p_reg->gatt_if, p_tcb, TRUE, FALSE);
}
return ret;
}
/*******************************************************************************
**
** Function gatt_le_data_ind
**
** Description This function is called when data is received from L2CAP.
** if we are the originator of the connection, we are the ATT
** client, and the received message is queued up for the client.
**
** If we are the destination of the connection, we are the ATT
** server, so the message is passed to the server processing
** function.
**
** Returns void
**
*******************************************************************************/
static void gatt_le_data_ind (BD_ADDR bd_addr, BT_HDR *p_buf)
{
tGATT_TCB *p_tcb;
/* Find CCB based on bd addr */
if ((p_tcb = gatt_find_tcb_by_addr (bd_addr, BT_TRANSPORT_LE)) != NULL &&
gatt_get_ch_state(p_tcb) >= GATT_CH_OPEN)
{
gatt_data_process(p_tcb, p_buf);
}
else
{
GKI_freebuf (p_buf);
if (p_tcb != NULL)
{
GATT_TRACE_WARNING ("ATT - Ignored L2CAP data while in state: %d",
gatt_get_ch_state(p_tcb));
}
}
}
/*******************************************************************************
**
** Function gatt_l2cif_data_ind_cback
**
** Description This is the L2CAP data indication callback function.
**
**
** Returns void
**
*******************************************************************************/
static void gatt_l2cif_data_ind_cback(UINT16 lcid, BT_HDR *p_buf)
{
tGATT_TCB *p_tcb;
/* look up clcb for this channel */
if ((p_tcb = gatt_find_tcb_by_cid(lcid)) != NULL &&
gatt_get_ch_state(p_tcb) == GATT_CH_OPEN)
{
/* process the data */
gatt_data_process(p_tcb, p_buf);
}
else /* prevent buffer leak */
GKI_freebuf(p_buf);
}
/*******************************************************************************
**
** Function gatt_act_connect
**
** Description GATT connection initiation.
**
** Returns void.
**
*******************************************************************************/
BOOLEAN gatt_act_connect (tGATT_REG *p_reg, BD_ADDR bd_addr, tBT_TRANSPORT transport)
{
BOOLEAN ret = FALSE;
tGATT_TCB *p_tcb;
UINT8 st;
if ((p_tcb = gatt_find_tcb_by_addr(bd_addr, transport)) != NULL)
{
ret = TRUE;
st = gatt_get_ch_state(p_tcb);
/* before link down, another app try to open a GATT connection */
if(st == GATT_CH_OPEN && gatt_num_apps_hold_link(p_tcb) == 0 &&
transport == BT_TRANSPORT_LE )
{
if (!gatt_connect(bd_addr, p_tcb, transport))
ret = FALSE;
}
else if(st == GATT_CH_CLOSING)
{
/* need to complete the closing first */
ret = FALSE;
}
}
else
{
if ((p_tcb = gatt_allocate_tcb_by_bdaddr(bd_addr, transport)) != NULL)
{
if (!gatt_connect(bd_addr, p_tcb, transport))
{
GATT_TRACE_ERROR("gatt_connect failed");
memset(p_tcb, 0, sizeof(tGATT_TCB));
}
else
ret = TRUE;
}
else
{
ret = 0;
GATT_TRACE_ERROR("Max TCB for gatt_if [%d] reached.", p_reg->gatt_if);
}
}
if (ret)
{
gatt_update_app_use_link_flag(p_reg->gatt_if, p_tcb, TRUE, FALSE);
}
return ret;
}
/*******************************************************************************
**
** Function gatt_l2cif_config_cfm_cback
**
** Description This is the L2CAP config confirm callback function.
**
**
** Returns void
**
*******************************************************************************/
void gatt_l2cif_config_cfm_cback(UINT16 lcid, tL2CAP_CFG_INFO *p_cfg)
{
tGATT_TCB *p_tcb;
tGATTS_SRV_CHG *p_srv_chg_clt=NULL;
/* look up clcb for this channel */
if ((p_tcb = gatt_find_tcb_by_cid(lcid)) != NULL)
{
/* if in correct state */
if ( gatt_get_ch_state(p_tcb) == GATT_CH_CFG)
{
/* if result successful */
if (p_cfg->result == L2CAP_CFG_OK)
{
/* update flags */
p_tcb->ch_flags |= GATT_L2C_CFG_CFM_DONE;
/* if configuration complete */
if (p_tcb->ch_flags & GATT_L2C_CFG_IND_DONE)
{
gatt_set_ch_state(p_tcb, GATT_CH_OPEN);
if ((p_srv_chg_clt = gatt_is_bda_in_the_srv_chg_clt_list(p_tcb->peer_bda)) != NULL)
{
gatt_chk_srv_chg(p_srv_chg_clt);
}
else
{
if (btm_sec_is_a_bonded_dev(p_tcb->peer_bda))
gatt_add_a_bonded_dev_for_srv_chg(p_tcb->peer_bda);
}
/* send callback */
gatt_send_conn_cback(p_tcb);
}
}
/* else failure */
else
{
/* Send L2CAP disconnect req */
L2CA_DisconnectReq(lcid);
}
}
}
}
/*******************************************************************************
**
** Function gatt_act_connect
**
** Description GATT connection initiation.
**
** Returns void.
**
*******************************************************************************/
BOOLEAN gatt_act_connect (tGATT_REG *p_reg, BD_ADDR bd_addr)
{
BOOLEAN ret = FALSE;
tGATT_TCB *p_tcb;
GATT_TRACE_DEBUG0("gatt_act_connect");
if ((p_tcb = gatt_find_tcb_by_addr(bd_addr)) != NULL)
{
ret = TRUE;
if(gatt_get_ch_state(p_tcb) == GATT_CH_CLOSING )
{
/* need to complete the closing first */
ret = FALSE;
}
}
else
{
if ((p_tcb = gatt_allocate_tcb_by_bdaddr(bd_addr)) != NULL)
{
if (!gatt_connect(bd_addr, p_tcb))
{
GATT_TRACE_ERROR0("gatt_connect failed");
memset(p_tcb, 0, sizeof(tGATT_TCB));
}
else
ret = TRUE;
}
else
{
ret = 0;
GATT_TRACE_ERROR1("Max TCB for gatt_if [%d] reached.", p_reg->gatt_if);
}
}
if (ret)
{
gatt_update_app_use_link_flag(p_reg->gatt_if, p_tcb, TRUE, FALSE);
}
return ret;
}
/*******************************************************************************
**
** Function gatt_connect
**
** Description This function is called to initiate a connection to a peer device.
**
** Parameter rem_bda: remote device address to connect to.
**
** Returns TRUE if connection is started, otherwise return FALSE.
**
*******************************************************************************/
BOOLEAN gatt_connect (BD_ADDR rem_bda, tGATT_TCB *p_tcb, tBT_TRANSPORT transport)
{
BOOLEAN gatt_ret = FALSE;
if (gatt_get_ch_state(p_tcb) != GATT_CH_OPEN)
gatt_set_ch_state(p_tcb, GATT_CH_CONN);
if (transport == BT_TRANSPORT_LE)
{
p_tcb->att_lcid = L2CAP_ATT_CID;
gatt_ret = L2CA_ConnectFixedChnl (L2CAP_ATT_CID, rem_bda);
}
else
{
if ((p_tcb->att_lcid = L2CA_ConnectReq(BT_PSM_ATT, rem_bda)) != 0)
gatt_ret = TRUE;
}
return gatt_ret;
}
/*******************************************************************************
**
** Function gatt_l2c_connect_cfm_cback
**
** Description This is the L2CAP connect confirm callback function.
**
**
** Returns void
**
*******************************************************************************/
static void gatt_l2cif_connect_cfm_cback(UINT16 lcid, UINT16 result)
{
tGATT_TCB *p_tcb;
tL2CAP_CFG_INFO cfg;
/* look up clcb for this channel */
if ((p_tcb = gatt_find_tcb_by_cid(lcid)) != NULL)
{
GATT_TRACE_DEBUG("gatt_l2c_connect_cfm_cback result: %d ch_state: %d, lcid:0x%x", result, gatt_get_ch_state(p_tcb), p_tcb->att_lcid);
/* if in correct state */
if (gatt_get_ch_state(p_tcb) == GATT_CH_CONN)
{
/* if result successful */
if (result == L2CAP_CONN_OK)
{
/* set channel state */
gatt_set_ch_state(p_tcb, GATT_CH_CFG);
/* Send L2CAP config req */
memset(&cfg, 0, sizeof(tL2CAP_CFG_INFO));
cfg.mtu_present = TRUE;
cfg.mtu = GATT_MAX_MTU_SIZE;
L2CA_ConfigReq(lcid, &cfg);
}
/* else initiating connection failure */
else
{
gatt_cleanup_upon_disc(p_tcb->peer_bda, result, GATT_TRANSPORT_BR_EDR);
}
}
else /* wrong state, disconnect it */
{
if (result == L2CAP_CONN_OK)
{
/* just in case the peer also accepts our connection - Send L2CAP disconnect req */
L2CA_DisconnectReq(lcid);
}
}
}
}
/*******************************************************************************
**
** Function gatt_connect
**
** Description This function is called to initiate a connection to a peer device.
**
** Parameter rem_bda: remote device address to connect to.
**
** Returns TRUE if connection is started, otherwise return FALSE.
**
*******************************************************************************/
BOOLEAN gatt_connect (BD_ADDR rem_bda, tGATT_TCB *p_tcb)
{
BOOLEAN gatt_ret = FALSE;
if (gatt_get_ch_state(p_tcb) != GATT_CH_OPEN)
gatt_set_ch_state(p_tcb, GATT_CH_CONN);
/* select the physical link for GATT connection */
if (BTM_UseLeLink(rem_bda))
{
p_tcb->att_lcid = L2CAP_ATT_CID;
gatt_ret = L2CA_ConnectFixedChnl (L2CAP_ATT_CID, rem_bda);
}
else
{
if ((p_tcb->att_lcid = L2CA_ConnectReq(BT_PSM_ATT, rem_bda)) != 0)
gatt_ret = TRUE;
}
return gatt_ret;
}
/*******************************************************************************
**
** Function gatt_disconnect
**
** Description This function is called to disconnect to an ATT device.
**
** Parameter rem_bda: remote device address to disconnect from.
**
** Returns TRUE: if connection found and to be disconnected; otherwise
** return FALSE.
**
*******************************************************************************/
BOOLEAN gatt_disconnect (BD_ADDR rem_bda)
{
tGATT_TCB *p_tcb = gatt_find_tcb_by_addr(rem_bda);
BOOLEAN ret = FALSE;
tGATT_CH_STATE ch_state;
GATT_TRACE_DEBUG0 ("gatt_disconnect ");
if (p_tcb != NULL)
{
ret = TRUE;
if ( (ch_state = gatt_get_ch_state(p_tcb)) != GATT_CH_CLOSING )
{
if (p_tcb->att_lcid == L2CAP_ATT_CID)
{
if (ch_state == GATT_CH_OPEN)
{
/* only LCB exist between remote device and local */
ret = L2CA_RemoveFixedChnl (L2CAP_ATT_CID, rem_bda);
}
else
{
gatt_set_ch_state(p_tcb, GATT_CH_CLOSING);
ret = L2CA_CancelBleConnectReq (rem_bda);
}
}
else
{
ret = L2CA_DisconnectReq(p_tcb->att_lcid);
}
}
else
{
GATT_TRACE_DEBUG0 ("gatt_disconnect already in closing state");
}
}
return ret;
}
/*******************************************************************************
**
** Function gatt_le_connect_cback
**
** Description This callback function is called by L2CAP to indicate that
** the ATT fixed channel for LE is
** connected (conn = TRUE)/disconnected (conn = FALSE).
**
*******************************************************************************/
static void gatt_le_connect_cback (BD_ADDR bd_addr, BOOLEAN connected,
UINT16 reason, tBT_TRANSPORT transport)
{
tGATT_TCB *p_tcb = gatt_find_tcb_by_addr(bd_addr, transport);
BOOLEAN check_srv_chg = FALSE;
tGATTS_SRV_CHG *p_srv_chg_clt=NULL;
/* ignore all fixed channel connect/disconnect on BR/EDR link for GATT */
if (transport == BT_TRANSPORT_BR_EDR)
return;
GATT_TRACE_DEBUG ("GATT ATT protocol channel with BDA: %08x%04x is %s",
(bd_addr[0]<<24)+(bd_addr[1]<<16)+(bd_addr[2]<<8)+bd_addr[3],
(bd_addr[4]<<8)+bd_addr[5], (connected) ? "connected" : "disconnected");
if ((p_srv_chg_clt = gatt_is_bda_in_the_srv_chg_clt_list(bd_addr)) != NULL)
{
check_srv_chg = TRUE;
}
else
{
if (btm_sec_is_a_bonded_dev(bd_addr))
gatt_add_a_bonded_dev_for_srv_chg(bd_addr);
}
if (connected)
{
/* do we have a channel initiating a connection? */
if (p_tcb)
{
/* we are initiating connection */
if ( gatt_get_ch_state(p_tcb) == GATT_CH_CONN)
{
/* send callback */
gatt_set_ch_state(p_tcb, GATT_CH_OPEN);
p_tcb->payload_size = GATT_DEF_BLE_MTU_SIZE;
gatt_send_conn_cback(p_tcb);
}
if (check_srv_chg)
gatt_chk_srv_chg (p_srv_chg_clt);
}
/* this is incoming connection or background connection callback */
else
{
if ((p_tcb = gatt_allocate_tcb_by_bdaddr(bd_addr, BT_TRANSPORT_LE)) != NULL)
{
p_tcb->att_lcid = L2CAP_ATT_CID;
gatt_set_ch_state(p_tcb, GATT_CH_OPEN);
p_tcb->payload_size = GATT_DEF_BLE_MTU_SIZE;
gatt_send_conn_cback (p_tcb);
if (check_srv_chg)
{
gatt_chk_srv_chg (p_srv_chg_clt);
}
}
else
{
GATT_TRACE_ERROR("CCB max out, no rsources");
}
}
}
else
{
gatt_cleanup_upon_disc(bd_addr, reason, transport);
GATT_TRACE_DEBUG ("ATT disconnected");
}
}
/*******************************************************************************
**
** Function gatt_le_connect_cback
**
** Description This callback function is called by L2CAP to indicate that
** the ATT fixed channel for LE is
** connected (conn = TRUE)/disconnected (conn = FALSE).
**
*******************************************************************************/
static void gatt_le_connect_cback (BD_ADDR bd_addr, BOOLEAN connected, UINT16 reason)
{
tGATT_TCB *p_tcb = gatt_find_tcb_by_addr(bd_addr);
BOOLEAN check_srv_chg = FALSE;
tGATTS_SRV_CHG *p_srv_chg_clt=NULL;
BOOLEAN is_bg_conn = FALSE;
GATT_TRACE_DEBUG3 ("GATT ATT protocol channel with BDA: %08x%04x is %s",
(bd_addr[0]<<24)+(bd_addr[1]<<16)+(bd_addr[2]<<8)+bd_addr[3],
(bd_addr[4]<<8)+bd_addr[5], (connected) ? "connected" : "disconnected");
if ((p_srv_chg_clt = gatt_is_bda_in_the_srv_chg_clt_list(bd_addr)) != NULL)
{
check_srv_chg = TRUE;
}
else
{
if (btm_sec_is_a_bonded_dev(bd_addr))
gatt_add_a_bonded_dev_for_srv_chg(bd_addr);
}
if (connected)
{
GATT_TRACE_DEBUG1("connected is TRUE reason=%d",reason );
/* BR/EDR lik, ignore this callback */
if (reason == 0)
return;
/* do we have a channel initiating a connection? */
if (p_tcb)
{
if (check_srv_chg)
gatt_chk_srv_chg (p_srv_chg_clt);
/* we are initiating connection */
if ( gatt_get_ch_state(p_tcb) == GATT_CH_CONN)
{
/* send callback */
gatt_set_ch_state(p_tcb, GATT_CH_OPEN);
p_tcb->payload_size = GATT_DEF_BLE_MTU_SIZE;
gatt_send_conn_cback(FALSE, p_tcb);
}
else /* there was an exisiting link, ignore the callback */
{
GATT_TRACE_ERROR0("connection already up, ignore it");
return;
}
}
/* this is incoming connection or background connection callback */
else
{
if ((p_tcb = gatt_allocate_tcb_by_bdaddr(bd_addr)) != NULL)
{
p_tcb->att_lcid = L2CAP_ATT_CID;
gatt_set_ch_state(p_tcb, GATT_CH_OPEN);
p_tcb->payload_size = GATT_DEF_BLE_MTU_SIZE;
if (L2CA_GetBleConnRole(p_tcb->peer_bda)== HCI_ROLE_MASTER)
{
is_bg_conn = TRUE;
}
gatt_send_conn_cback (is_bg_conn, p_tcb);
if (check_srv_chg)
{
gatt_chk_srv_chg (p_srv_chg_clt);
}
}
else
{
GATT_TRACE_ERROR0("CCB max out, no rsources");
}
}
}
else
{
gatt_cleanup_upon_disc(bd_addr, reason);
GATT_TRACE_DEBUG0 ("ATT disconnected");
}
}