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/*****************************************************************************
**
** Name: l2c_ble.c
**
** Description: this file contains functions relating to BLE management.
**
**
** Copyright (c) 2009-2012, Broadcom Corp, All Rights Reserved.
******************************************************************************/
#include <string.h>
#include "bt_target.h"
#include "l2cdefs.h"
#include "l2c_int.h"
#include "btu.h"
#include "btm_int.h"
#include "hcimsgs.h"
#if (BLE_INCLUDED == TRUE)
/*******************************************************************************
**
** Function L2CA_CancelBleConnectReq
**
** Description Cancel a pending connection attempt to a BLE device.
**
** Parameters: BD Address of remote
**
** Return value: TRUE if connection was cancelled
**
*******************************************************************************/
BOOLEAN L2CA_CancelBleConnectReq (BD_ADDR rem_bda)
{
tL2C_LCB *p_lcb;
/* There can be only one BLE connection request outstanding at a time */
if (!l2cb.is_ble_connecting)
{
L2CAP_TRACE_WARNING0 ("L2CA_CancelBleConnectReq - no connection pending");
return(FALSE);
}
if (memcmp (rem_bda, l2cb.ble_connecting_bda, BD_ADDR_LEN))
{
L2CAP_TRACE_WARNING4 ("L2CA_CancelBleConnectReq - different BDA Connecting: %08x%04x Cancel: %08x%04x",
(l2cb.ble_connecting_bda[0]<<24)+(l2cb.ble_connecting_bda[1]<<16)+(l2cb.ble_connecting_bda[2]<<8)+l2cb.ble_connecting_bda[3],
(l2cb.ble_connecting_bda[4]<<8)+l2cb.ble_connecting_bda[5],
(rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], (rem_bda[4]<<8)+rem_bda[5]);
return(FALSE);
}
if (btsnd_hcic_ble_create_conn_cancel())
{
if ((p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda)) != NULL)
{
p_lcb->disc_reason = L2CAP_CONN_CANCEL;
l2cu_release_lcb (p_lcb);
}
l2cb.is_ble_connecting = FALSE;
btm_ble_update_bg_state();
btm_ble_resume_bg_conn(NULL, TRUE);
return(TRUE);
}
else
return(FALSE);
}
/*******************************************************************************
**
** Function L2CA_UpdateBleConnParams
**
** Description Update BLE connection parameters.
**
** Parameters: BD Address of remote
**
** Return value: TRUE if update started
**
*******************************************************************************/
BOOLEAN L2CA_UpdateBleConnParams (BD_ADDR rem_bda, UINT16 min_int, UINT16 max_int, UINT16 latency, UINT16 timeout)
{
tL2C_LCB *p_lcb;
/* See if we have a link control block for the remote device */
p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda);
/* If we don't have one, create one and accept the connection. */
if (!p_lcb)
{
L2CAP_TRACE_WARNING2 ("L2CA_UpdateBleConnParams - unknown BD_ADDR %08x%04x",
(rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], (rem_bda[4]<<8)+rem_bda[5]);
return(FALSE);
}
if (!p_lcb->is_ble_link)
{
L2CAP_TRACE_WARNING2 ("L2CA_UpdateBleConnParams - BD_ADDR %08x%04x not LE",
(rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], (rem_bda[4]<<8)+rem_bda[5]);
return(FALSE);
}
if (p_lcb->link_role == HCI_ROLE_MASTER)
btsnd_hcic_ble_upd_ll_conn_params (p_lcb->handle, min_int, max_int, latency, timeout, 0, 0);
else
l2cu_send_peer_ble_par_req (p_lcb, min_int, max_int, latency, timeout);
return(TRUE);
}
/*******************************************************************************
**
** Function L2CA_EnableUpdateBleConnParams
**
** Description Enable or disable update based on the request from the peer
**
** Parameters: BD Address of remote
**
** Return value: TRUE if update started
**
*******************************************************************************/
BOOLEAN L2CA_EnableUpdateBleConnParams (BD_ADDR rem_bda, BOOLEAN enable)
{
tL2C_LCB *p_lcb;
/* See if we have a link control block for the remote device */
p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda);
/* If we don't have one, create one and accept the connection. */
if (!p_lcb)
{
L2CAP_TRACE_WARNING2 ("L2CA_EnableUpdateBleConnParams - unknown BD_ADDR %08x%04x",
(rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], (rem_bda[4]<<8)+rem_bda[5]);
return (FALSE);
}
L2CAP_TRACE_API4 ("L2CA_EnableUpdateBleConnParams - BD_ADDR %08x%04x enable %d current upd state %d",
(rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], (rem_bda[4]<<8)+rem_bda[5], enable, p_lcb->upd_disabled);
if (!p_lcb->is_ble_link || (p_lcb->link_role != HCI_ROLE_MASTER))
{
L2CAP_TRACE_WARNING3 ("L2CA_EnableUpdateBleConnParams - BD_ADDR %08x%04x not LE or not master %d",
(rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], (rem_bda[4]<<8)+rem_bda[5], p_lcb->link_role);
return (FALSE);
}
if (enable)
{
/* application allows to do update, if we were delaying one do it now, otherwise
just mark lcb that updates are enabled */
if (p_lcb->upd_disabled == UPD_PENDING)
{
btsnd_hcic_ble_upd_ll_conn_params (p_lcb->handle, p_lcb->min_interval, p_lcb->max_interval,
p_lcb->latency, p_lcb->timeout, 0, 0);
p_lcb->upd_disabled = UPD_UPDATED;
}
else
{
p_lcb->upd_disabled = UPD_ENABLED;
}
}
else
{
/* application requests to disable parameters update. If parameters are already updated, lets set them
up to what has been requested during connection establishement */
if (p_lcb->upd_disabled == UPD_UPDATED)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (rem_bda);
btsnd_hcic_ble_upd_ll_conn_params (p_lcb->handle,
(UINT16)((p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ? p_dev_rec->conn_params.min_conn_int : L2CAP_LE_INT_MIN),
(UINT16)((p_dev_rec->conn_params.max_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ? p_dev_rec->conn_params.max_conn_int : L2CAP_LE_INT_MAX),
(UINT16)((p_dev_rec->conn_params.slave_latency != BTM_BLE_CONN_PARAM_UNDEF) ? p_dev_rec->conn_params.slave_latency : 0),
(UINT16) ((p_dev_rec->conn_params.supervision_tout != BTM_BLE_CONN_PARAM_UNDEF) ? p_dev_rec->conn_params.supervision_tout : L2CAP_LE_TIMEOUT_MAX),
0, 0);
}
p_lcb->upd_disabled = UPD_DISABLED;
}
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_GetBleConnRole
**
** Description This function returns the connection role.
**
** Returns link role.
**
*******************************************************************************/
UINT8 L2CA_GetBleConnRole (BD_ADDR bd_addr)
{
UINT8 role = HCI_ROLE_UNKNOWN;
tL2C_LCB *p_lcb;
if ((p_lcb = l2cu_find_lcb_by_bd_addr (bd_addr)) != NULL)
role = p_lcb->link_role;
return role;
}
/*******************************************************************************
**
** Function L2CA_GetDisconnectReason
**
** Description This function returns the disconnect reason code.
**
** Returns disconnect reason
**
*******************************************************************************/
UINT16 L2CA_GetDisconnectReason (BD_ADDR remote_bda)
{
tL2C_LCB *p_lcb;
UINT16 reason = 0;
if ((p_lcb = l2cu_find_lcb_by_bd_addr (remote_bda)) != NULL)
reason = p_lcb->disc_reason;
L2CAP_TRACE_DEBUG1 ("L2CA_GetDisconnectReason=%d ",reason);
return reason;
}
/*******************************************************************************
**
** Function l2cble_scanner_conn_comp
**
** Description This function is called when an HCI Connection Complete
** event is received while we are a scanner (so we are master).
**
** Returns void
**
*******************************************************************************/
void l2cble_scanner_conn_comp (UINT16 handle, BD_ADDR bda, tBLE_ADDR_TYPE type, UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
{
tL2C_LCB *p_lcb;
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (bda);
L2CAP_TRACE_DEBUG5 ("l2cble_scanner_conn_comp: HANDLE=%d addr_type=%d conn_interval=%d slave_latency=%d supervision_tout=%d",
handle, type, conn_interval, conn_latency, conn_timeout);
l2cb.is_ble_connecting = FALSE;
p_dev_rec->device_type = BT_DEVICE_TYPE_BLE;
p_dev_rec->ble.ble_addr_type = type;
/* See if we have a link control block for the remote device */
p_lcb = l2cu_find_lcb_by_bd_addr (bda);
/* If we don't have one, create one. this is auto connection complete. */
if (!p_lcb)
{
p_lcb = l2cu_allocate_lcb (bda, FALSE);
if (!p_lcb)
{
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
L2CAP_TRACE_ERROR0 ("l2cble_scanner_conn_comp - failed to allocate LCB");
return;
}
else
{
if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts))
{
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
L2CAP_TRACE_WARNING0 ("l2cble_scanner_conn_comp - LCB but no CCB");
return ;
}
}
}
else if (p_lcb->link_state != LST_CONNECTING)
{
L2CAP_TRACE_ERROR1 ("L2CAP got BLE scanner conn_comp in bad state: %d", p_lcb->link_state);
return;
}
btu_stop_timer(&p_lcb->timer_entry);
/* Save the handle */
p_lcb->handle = handle;
/* Connected OK. Change state to connected, we were scanning so we are master */
p_lcb->link_state = LST_CONNECTED;
p_lcb->link_role = HCI_ROLE_MASTER;
p_lcb->is_ble_link = TRUE;
/* If there are any preferred connection parameters, set them now */
if ( (p_dev_rec->conn_params.min_conn_int >= L2CAP_LE_INT_MIN ) &&
(p_dev_rec->conn_params.min_conn_int <= L2CAP_LE_INT_MAX ) &&
(p_dev_rec->conn_params.max_conn_int >= L2CAP_LE_INT_MIN ) &&
(p_dev_rec->conn_params.max_conn_int <= L2CAP_LE_INT_MAX ) &&
(p_dev_rec->conn_params.slave_latency <= L2CAP_LE_LATENCY_MAX ) &&
(p_dev_rec->conn_params.supervision_tout >= L2CAP_LE_TIMEOUT_MIN) &&
(p_dev_rec->conn_params.supervision_tout <= L2CAP_LE_TIMEOUT_MAX) &&
((conn_interval < p_dev_rec->conn_params.min_conn_int &&
p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ||
(conn_interval > p_dev_rec->conn_params.max_conn_int) ||
(conn_latency > p_dev_rec->conn_params.slave_latency) ||
(conn_timeout > p_dev_rec->conn_params.supervision_tout)))
{
L2CAP_TRACE_ERROR5 ("upd_ll_conn_params: HANDLE=%d min_conn_int=%d max_conn_int=%d slave_latency=%d supervision_tout=%d",
handle, p_dev_rec->conn_params.min_conn_int, p_dev_rec->conn_params.max_conn_int,
p_dev_rec->conn_params.slave_latency, p_dev_rec->conn_params.supervision_tout);
btsnd_hcic_ble_upd_ll_conn_params (handle,
p_dev_rec->conn_params.min_conn_int,
p_dev_rec->conn_params.max_conn_int,
p_dev_rec->conn_params.slave_latency,
p_dev_rec->conn_params.supervision_tout,
0, 0);
}
/* Tell BTM Acl management about the link */
btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, TRUE);
if (p_lcb->p_echo_rsp_cb)
{
L2CAP_TRACE_ERROR0 ("l2cu_send_peer_echo_req");
l2cu_send_peer_echo_req (p_lcb, NULL, 0);
}
p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT;
l2cu_process_fixed_chnl_resp (p_lcb);
}
/*******************************************************************************
**
** Function l2cble_advertiser_conn_comp
**
** Description This function is called when an HCI Connection Complete
** event is received while we are an advertiser (so we are slave).
**
** Returns void
**
*******************************************************************************/
void l2cble_advertiser_conn_comp (UINT16 handle, BD_ADDR bda, tBLE_ADDR_TYPE type,
UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
{
tL2C_LCB *p_lcb;
tBTM_SEC_DEV_REC *p_dev_rec;
/* See if we have a link control block for the remote device */
p_lcb = l2cu_find_lcb_by_bd_addr (bda);
/* If we don't have one, create one and accept the connection. */
if (!p_lcb)
{
p_lcb = l2cu_allocate_lcb (bda, FALSE);
if (!p_lcb)
{
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
L2CAP_TRACE_ERROR0 ("l2cble_advertiser_conn_comp - failed to allocate LCB");
return;
}
else
{
if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts))
{
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
L2CAP_TRACE_WARNING0 ("l2cble_scanner_conn_comp - LCB but no CCB");
return ;
}
}
}
/* Save the handle */
p_lcb->handle = handle;
/* Connected OK. Change state to connected, we were advertising, so we are slave */
p_lcb->link_state = LST_CONNECTED;
p_lcb->link_role = HCI_ROLE_SLAVE;
p_lcb->is_ble_link = TRUE;
/* Tell BTM Acl management about the link */
p_dev_rec = btm_find_or_alloc_dev (bda);
p_dev_rec->device_type = BT_DEVICE_TYPE_BLE;
p_dev_rec->ble.ble_addr_type = type;
btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, TRUE);
p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT;
l2cu_process_fixed_chnl_resp (p_lcb);
}
/*******************************************************************************
**
** Function l2cble_conn_comp
**
** Description This function is called when an HCI Connection Complete
** event is received.
**
** Returns void
**
*******************************************************************************/
void l2cble_conn_comp(UINT16 handle, UINT8 role, BD_ADDR bda, tBLE_ADDR_TYPE type,
UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
{
if (role == HCI_ROLE_MASTER)
{
l2cble_scanner_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout);
}
else
{
l2cble_advertiser_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout);
}
}
/*******************************************************************************
**
** Function l2cble_process_sig_cmd
**
** Description This function is called when a signalling packet is received
** on the BLE signalling CID
**
** Returns void
**
*******************************************************************************/
void l2cble_process_sig_cmd (tL2C_LCB *p_lcb, UINT8 *p, UINT16 pkt_len)
{
UINT8 *p_pkt_end;
UINT8 cmd_code, id;
UINT16 cmd_len, rej_reason;
UINT16 result;
UINT16 min_interval, max_interval, latency, timeout;
p_pkt_end = p + pkt_len;
STREAM_TO_UINT8 (cmd_code, p);
STREAM_TO_UINT8 (id, p);
STREAM_TO_UINT16 (cmd_len, p);
/* Check command length does not exceed packet length */
if ((p + cmd_len) > p_pkt_end)
{
L2CAP_TRACE_WARNING3 ("L2CAP - LE - format error, pkt_len: %d cmd_len: %d code: %d", pkt_len, cmd_len, cmd_code);
return;
}
switch (cmd_code)
{
case L2CAP_CMD_REJECT:
case L2CAP_CMD_ECHO_RSP:
case L2CAP_CMD_INFO_RSP:
STREAM_TO_UINT16 (rej_reason, p);
break;
case L2CAP_CMD_ECHO_REQ:
case L2CAP_CMD_INFO_REQ:
l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
break;
case L2CAP_CMD_BLE_UPDATE_REQ:
STREAM_TO_UINT16 (min_interval, p); /* 0x0006 - 0x0C80 */
STREAM_TO_UINT16 (max_interval, p); /* 0x0006 - 0x0C80 */
STREAM_TO_UINT16 (latency, p); /* 0x0000 - 0x03E8 */
STREAM_TO_UINT16 (timeout, p); /* 0x000A - 0x0C80 */
/* If we are a master, the slave wants to update the parameters */
if (p_lcb->link_role == HCI_ROLE_MASTER)
{
if (min_interval < L2CAP_LE_INT_MIN || min_interval > L2CAP_LE_INT_MAX ||
max_interval < L2CAP_LE_INT_MIN || max_interval > L2CAP_LE_INT_MAX ||
latency > L2CAP_LE_LATENCY_MAX ||
/*(timeout >= max_interval && latency > (timeout * 10/(max_interval * 1.25) - 1)) ||*/
timeout < L2CAP_LE_TIMEOUT_MIN || timeout > L2CAP_LE_TIMEOUT_MAX ||
max_interval < min_interval)
{
result = L2CAP_CFG_UNACCEPTABLE_PARAMS;
}
else
{
l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_OK, id);
p_lcb->min_interval = min_interval;
p_lcb->max_interval = max_interval;
p_lcb->latency = latency;
p_lcb->timeout = timeout;
if (p_lcb->upd_disabled == UPD_ENABLED)
{
btsnd_hcic_ble_upd_ll_conn_params (p_lcb->handle, min_interval, max_interval,
latency, timeout, 0, 0);
p_lcb->upd_disabled = UPD_UPDATED;
}
else
{
L2CAP_TRACE_EVENT0 ("L2CAP - LE - update currently disabled");
p_lcb->upd_disabled = UPD_PENDING;
}
}
}
else
l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
break;
case L2CAP_CMD_BLE_UPDATE_RSP:
STREAM_TO_UINT16 (result, p);
break;
default:
L2CAP_TRACE_WARNING1 ("L2CAP - LE - unknown cmd code: %d", cmd_code);
l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
return;
}
}
/*******************************************************************************
**
** Function l2cble_create_conn
**
** Description This function initiates an acl connection via HCI
**
** Returns TRUE if successful, FALSE if connection not started.
**
*******************************************************************************/
BOOLEAN l2cble_create_conn (tL2C_LCB *p_lcb)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_lcb->remote_bd_addr);
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
UINT16 scan_int, scan_win;
/* There can be only one BLE connection request outstanding at a time */
if (l2cb.is_ble_connecting)
{
L2CAP_TRACE_WARNING0 ("L2CAP - LE - cannot start new connection, already connecting");
return(FALSE);
}
p_lcb->link_state = LST_CONNECTING;
l2cb.is_ble_connecting = TRUE;
memcpy (l2cb.ble_connecting_bda, p_lcb->remote_bd_addr, BD_ADDR_LEN);
btm_ble_suspend_bg_conn();
scan_int = (p_cb->scan_int == BTM_BLE_CONN_PARAM_UNDEF) ? L2CAP_LE_INT_MIN : p_cb->scan_int;
scan_win = (p_cb->scan_win == BTM_BLE_CONN_PARAM_UNDEF) ? L2CAP_LE_INT_MIN : p_cb->scan_win;
if (!btsnd_hcic_ble_create_ll_conn (scan_int,/* UINT16 scan_int */
scan_win, /* UINT16 scan_win */
FALSE, /* UINT8 white_list */
p_lcb->ble_addr_type, /* UINT8 addr_type_peer */
p_lcb->remote_bd_addr, /* BD_ADDR bda_peer */
BLE_ADDR_PUBLIC, /* UINT8 addr_type_own */
(UINT16) ((p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ? p_dev_rec->conn_params.min_conn_int : L2CAP_LE_INT_MIN), /* UINT16 conn_int_min */
(UINT16) ((p_dev_rec->conn_params.max_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ? p_dev_rec->conn_params.max_conn_int : L2CAP_LE_INT_MIN), /* UINT16 conn_int_max */
(UINT16) ((p_dev_rec->conn_params.slave_latency != BTM_BLE_CONN_PARAM_UNDEF) ? p_dev_rec->conn_params.slave_latency : 0), /* UINT16 conn_latency */
(UINT16) ((p_dev_rec->conn_params.supervision_tout != BTM_BLE_CONN_PARAM_UNDEF) ? p_dev_rec->conn_params.supervision_tout : L2CAP_LE_TIMEOUT_MAX), /* UINT16 conn_timeout */
0, /* UINT16 min_len */
0)) /* UINT16 max_len */
{
/* No buffer for connection request ? */
l2cb.is_ble_connecting = FALSE;
p_lcb->disc_reason = L2CAP_CONN_NO_RESOURCES;
l2cu_release_lcb (p_lcb);
return(FALSE);
}
else
btu_start_timer (&p_lcb->timer_entry, BTU_TTYPE_L2CAP_LINK, L2CAP_BLE_LINK_CONNECT_TOUT);
return(TRUE);
}
/*******************************************************************************
**
** Function l2c_link_processs_ble_num_bufs
**
** Description This function is called when a "controller buffer size"
** event is first received from the controller. It updates
** the L2CAP values.
**
** Returns void
**
*******************************************************************************/
void l2c_link_processs_ble_num_bufs (UINT16 num_lm_ble_bufs)
{
l2cb.num_lm_ble_bufs = l2cb.controller_le_xmit_window = num_lm_ble_bufs;
}
#endif /* (BLE_INCLUDED == TRUE) */
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