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esp-idf/components/bt/host/bluedroid/stack/btm/btm_dev.c

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/******************************************************************************
*
* Copyright (C) 1999-2012 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 file contains functions for the Bluetooth Device Manager
*
******************************************************************************/
#include <stdlib.h>
#include <string.h>
//#include <stdio.h>
#include <stddef.h>
#include "stack/bt_types.h"
#include "device/controller.h"
#include "stack/hcimsgs.h"
#include "stack/btu.h"
#include "stack/btm_api.h"
#include "btm_int.h"
#include "stack/hcidefs.h"
#include "stack/l2c_api.h"
static tBTM_SEC_DEV_REC *btm_find_oldest_dev (void);
/*******************************************************************************
**
** Function BTM_SecAddDevice
**
** Description Add/modify device. This function will be normally called
** during host startup to restore all required information
** stored in the NVRAM.
**
** Parameters: bd_addr - BD address of the peer
** dev_class - Device Class
** bd_name - Name of the peer device. NULL if unknown.
** features - Remote device's features (up to 3 pages). NULL if not known
** trusted_mask - Bitwise OR of services that do not
** require authorization. (array of UINT32)
** link_key - Connection link key. NULL if unknown.
**
** Returns TRUE if added OK, else FALSE
**
*******************************************************************************/
BOOLEAN BTM_SecAddDevice (BD_ADDR bd_addr, DEV_CLASS dev_class, BD_NAME bd_name,
UINT8 *features, UINT32 trusted_mask[],
LINK_KEY link_key, UINT8 key_type, tBTM_IO_CAP io_cap,
UINT8 pin_length)
{
#if (SMP_INCLUDED == TRUE)
tBTM_SEC_DEV_REC *p_dev_rec;
int i, j;
BOOLEAN found = FALSE;
BTM_TRACE_API("%s, link key type:%x\n", __FUNCTION__, key_type);
p_dev_rec = btm_find_dev (bd_addr);
if (!p_dev_rec) {
/* There is no device record, allocate one.
* If we can not find an empty spot for this one, let it fail. */
for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++) {
if (!(btm_cb.sec_dev_rec[i].sec_flags & BTM_SEC_IN_USE)) {
p_dev_rec = &btm_cb.sec_dev_rec[i];
/* Mark this record as in use and initialize */
memset (p_dev_rec, 0, sizeof (tBTM_SEC_DEV_REC));
p_dev_rec->sec_flags = BTM_SEC_IN_USE;
memcpy (p_dev_rec->bd_addr, bd_addr, BD_ADDR_LEN);
p_dev_rec->hci_handle = BTM_GetHCIConnHandle (bd_addr, BT_TRANSPORT_BR_EDR);
p_dev_rec->ble_hci_handle = BTM_GetHCIConnHandle (bd_addr, BT_TRANSPORT_LE);
#if BLE_INCLUDED == TRUE
/* use default value for background connection params */
/* update conn params, use default value for background connection params */
memset(&p_dev_rec->conn_params, 0xff, sizeof(tBTM_LE_CONN_PRAMS));
#endif
break;
}
}
if (!p_dev_rec) {
return (FALSE);
}
}
p_dev_rec->bond_type = BOND_TYPE_UNKNOWN; /* Default value */
p_dev_rec->timestamp = btm_cb.dev_rec_count++;
if (dev_class) {
memcpy (p_dev_rec->dev_class, dev_class, DEV_CLASS_LEN);
}
memset(p_dev_rec->sec_bd_name, 0, sizeof(tBTM_BD_NAME));
if (bd_name && bd_name[0]) {
p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN;
BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, (char *)bd_name, BTM_MAX_REM_BD_NAME_LEN);
}
p_dev_rec->num_read_pages = 0;
if (features) {
memcpy (p_dev_rec->features, features, sizeof (p_dev_rec->features));
for (i = HCI_EXT_FEATURES_PAGE_MAX; i >= 0; i--) {
for (j = 0; j < HCI_FEATURE_BYTES_PER_PAGE; j++) {
if (p_dev_rec->features[i][j] != 0) {
found = TRUE;
break;
}
}
if (found) {
p_dev_rec->num_read_pages = i + 1;
break;
}
}
} else {
memset (p_dev_rec->features, 0, sizeof (p_dev_rec->features));
}
BTM_SEC_COPY_TRUSTED_DEVICE(trusted_mask, p_dev_rec->trusted_mask);
if (link_key) {
BTM_TRACE_EVENT ("BTM_SecAddDevice() BDA: %02x:%02x:%02x:%02x:%02x:%02x\n",
bd_addr[0], bd_addr[1], bd_addr[2],
bd_addr[3], bd_addr[4], bd_addr[5]);
p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_KNOWN;
memcpy (p_dev_rec->link_key, link_key, LINK_KEY_LEN);
p_dev_rec->link_key_type = key_type;
p_dev_rec->pin_code_length = pin_length;
if (pin_length >= 16 ||
key_type == BTM_LKEY_TYPE_AUTH_COMB ||
key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) {
// Set the fiag if the link key was made by using either a 16 digit
// pin or MITM.
p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
}
}
#if defined(BTIF_MIXED_MODE_INCLUDED) && (BTIF_MIXED_MODE_INCLUDED == TRUE)
if (key_type < BTM_MAX_PRE_SM4_LKEY_TYPE) {
p_dev_rec->sm4 = BTM_SM4_KNOWN;
} else {
p_dev_rec->sm4 = BTM_SM4_TRUE;
}
#endif
p_dev_rec->rmt_io_caps = io_cap;
p_dev_rec->device_type |= BT_DEVICE_TYPE_BREDR;
#endif ///SMP_INCLUDED == TRUE
return (TRUE);
}
/*******************************************************************************
**
** Function BTM_SecDeleteDevice
**
** Description Free resources associated with the device.
**
** Parameters: bd_addr - BD address of the peer
** transport - BT_TRANSPORT_BR_EDR or BT_TRANSPORT_LE
**
** Returns TRUE if removed OK, FALSE if not found or ACL link is active
**
*******************************************************************************/
BOOLEAN BTM_SecDeleteDevice (BD_ADDR bd_addr, tBT_TRANSPORT transport)
{
tBTM_SEC_DEV_REC *p_dev_rec;
if (BTM_IsAclConnectionUp(bd_addr, transport)) {
BTM_TRACE_WARNING("%s FAILED: Cannot Delete when connection is active\n", __func__);
return FALSE;
}
if ((p_dev_rec = btm_find_dev(bd_addr)) != NULL) {
btm_sec_free_dev(p_dev_rec, transport);
/* Tell controller to get rid of the link key, if it has one stored */
BTM_DeleteStoredLinkKey (p_dev_rec->bd_addr, NULL);
}
return TRUE;
}
/*******************************************************************************
**
** Function BTM_SecClearSecurityFlags
**
** Description Reset the security flags (mark as not-paired) for a given
** remove device.
**
*******************************************************************************/
extern void BTM_SecClearSecurityFlags (BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == NULL) {
return;
}
p_dev_rec->sec_flags = 0;
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
p_dev_rec->sm4 = BTM_SM4_UNKNOWN;
}
/*******************************************************************************
**
** Function BTM_SecReadDevName
**
** Description Looks for the device name in the security database for the
** specified BD address.
**
** Returns Pointer to the name or NULL
**
*******************************************************************************/
char *BTM_SecReadDevName (BD_ADDR bd_addr)
{
char *p_name = NULL;
tBTM_SEC_DEV_REC *p_srec;
if ((p_srec = btm_find_dev(bd_addr)) != NULL) {
p_name = (char *)p_srec->sec_bd_name;
}
return (p_name);
}
/*******************************************************************************
**
** Function btm_sec_alloc_dev
**
** Description Look for the record in the device database for the record
** with specified address
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_sec_alloc_dev (BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec = NULL;
tBTM_INQ_INFO *p_inq_info;
int i;
DEV_CLASS old_cod;
int i_new_entry = BTM_SEC_MAX_DEVICE_RECORDS;
int i_old_entry = BTM_SEC_MAX_DEVICE_RECORDS;
BTM_TRACE_EVENT ("btm_sec_alloc_dev\n");
for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++) {
/* look for old entry where device details are present */
if (!(btm_cb.sec_dev_rec[i].sec_flags & BTM_SEC_IN_USE) &&
(!memcmp (btm_cb.sec_dev_rec[i].bd_addr, bd_addr, BD_ADDR_LEN))) {
i_old_entry = i;
BTM_TRACE_EVENT ("btm_sec_alloc_dev old device found\n");
break;
}
}
for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++) {
if (!(btm_cb.sec_dev_rec[i].sec_flags & BTM_SEC_IN_USE)) {
i_new_entry = i;
break;
}
}
if (i_new_entry == BTM_SEC_MAX_DEVICE_RECORDS) {
p_dev_rec = btm_find_oldest_dev();
} else {
/* if the old device entry not present go with
new entry */
if (i_old_entry == BTM_SEC_MAX_DEVICE_RECORDS) {
p_dev_rec = &btm_cb.sec_dev_rec[i_new_entry];
} else {
p_dev_rec = &btm_cb.sec_dev_rec[i_old_entry];
memcpy (old_cod, p_dev_rec->dev_class, DEV_CLASS_LEN);
}
}
memset (p_dev_rec, 0, sizeof (tBTM_SEC_DEV_REC));
/* Retain the old COD for device */
if (i_old_entry != BTM_SEC_MAX_DEVICE_RECORDS) {
BTM_TRACE_EVENT ("btm_sec_alloc_dev restoring cod \n");
memcpy (p_dev_rec->dev_class, old_cod, DEV_CLASS_LEN);
}
p_dev_rec->bond_type = BOND_TYPE_UNKNOWN; /* Default value */
p_dev_rec->sec_flags = BTM_SEC_IN_USE;
/* Check with the BT manager if details about remote device are known */
/* outgoing connection */
if ((p_inq_info = BTM_InqDbRead(bd_addr)) != NULL) {
memcpy (p_dev_rec->dev_class, p_inq_info->results.dev_class, DEV_CLASS_LEN);
#if BLE_INCLUDED == TRUE
p_dev_rec->device_type = p_inq_info->results.device_type;
p_dev_rec->ble.ble_addr_type = p_inq_info->results.ble_addr_type;
/* update conn params, use default value for background connection params */
memset(&p_dev_rec->conn_params, 0xff, sizeof(tBTM_LE_CONN_PRAMS));
#endif
} else {
#if BLE_INCLUDED == TRUE
/* update conn params, use default value for background connection params */
memset(&p_dev_rec->conn_params, 0xff, sizeof(tBTM_LE_CONN_PRAMS));
#endif
if (!memcmp (bd_addr, btm_cb.connecting_bda, BD_ADDR_LEN)) {
memcpy (p_dev_rec->dev_class, btm_cb.connecting_dc, DEV_CLASS_LEN);
}
}
memcpy (p_dev_rec->bd_addr, bd_addr, BD_ADDR_LEN);
#if BLE_INCLUDED == TRUE
p_dev_rec->ble_hci_handle = BTM_GetHCIConnHandle (bd_addr, BT_TRANSPORT_LE);
#endif
p_dev_rec->hci_handle = BTM_GetHCIConnHandle (bd_addr, BT_TRANSPORT_BR_EDR);
p_dev_rec->timestamp = btm_cb.dev_rec_count++;
return (p_dev_rec);
}
/*******************************************************************************
**
** Function btm_sec_free_dev
**
** Description Mark device record as not used
**
*******************************************************************************/
void btm_sec_free_dev (tBTM_SEC_DEV_REC *p_dev_rec, tBT_TRANSPORT transport)
{
if (transport == BT_TRANSPORT_BR_EDR) {
memset(p_dev_rec->link_key, 0, LINK_KEY_LEN);
p_dev_rec->sec_flags &= ~(BTM_SEC_AUTHORIZED | BTM_SEC_AUTHENTICATED
| BTM_SEC_ENCRYPTED | BTM_SEC_NAME_KNOWN
| BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED
| BTM_SEC_ROLE_SWITCHED | BTM_SEC_16_DIGIT_PIN_AUTHED);
} else if (transport == BT_TRANSPORT_LE) {
p_dev_rec->bond_type = BOND_TYPE_UNKNOWN;
p_dev_rec->sec_flags &= ~(BTM_SEC_LE_AUTHENTICATED | BTM_SEC_LE_ENCRYPTED
| BTM_SEC_LE_NAME_KNOWN | BTM_SEC_LE_LINK_KEY_KNOWN
| BTM_SEC_LE_LINK_KEY_AUTHED | BTM_SEC_ROLE_SWITCHED);
#if BLE_INCLUDED == TRUE
/* Clear out any saved BLE keys */
btm_sec_clear_ble_keys (p_dev_rec);
#endif
} else {
p_dev_rec->bond_type = BOND_TYPE_UNKNOWN;
memset(p_dev_rec->link_key, 0, LINK_KEY_LEN);
p_dev_rec->sec_flags = 0;
#if BLE_INCLUDED == TRUE
/* Clear out any saved BLE keys */
btm_sec_clear_ble_keys (p_dev_rec);
#endif
}
/* No BLE keys and BT keys, clear the sec_flags */
if(p_dev_rec->sec_flags == BTM_SEC_IN_USE) {
p_dev_rec->sec_flags = 0;
}
}
/*******************************************************************************
**
** Function btm_dev_support_switch
**
** Description This function is called by the L2CAP to check if remote
** device supports role switch
**
** Parameters: bd_addr - Address of the peer device
**
** Returns TRUE if device is known and role switch is supported
**
*******************************************************************************/
BOOLEAN btm_dev_support_switch (BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec;
UINT8 xx;
BOOLEAN feature_empty = TRUE;
#if BTM_SCO_INCLUDED == TRUE
/* Role switch is not allowed if a SCO is up */
if (btm_is_sco_active_by_bdaddr(bd_addr)) {
return (FALSE);
}
#endif
p_dev_rec = btm_find_dev (bd_addr);
if (p_dev_rec && controller_get_interface()->supports_master_slave_role_switch()) {
if (HCI_SWITCH_SUPPORTED(p_dev_rec->features[HCI_EXT_FEATURES_PAGE_0])) {
BTM_TRACE_DEBUG("btm_dev_support_switch return TRUE (feature found)\n");
return (TRUE);
}
/* If the feature field is all zero, we never received them */
for (xx = 0 ; xx < BD_FEATURES_LEN ; xx++) {
if (p_dev_rec->features[HCI_EXT_FEATURES_PAGE_0][xx] != 0x00) {
feature_empty = FALSE; /* at least one is != 0 */
break;
}
}
/* If we don't know peer's capabilities, assume it supports Role-switch */
if (feature_empty) {
BTM_TRACE_DEBUG("btm_dev_support_switch return TRUE (feature empty)\n");
return (TRUE);
}
}
BTM_TRACE_DEBUG("btm_dev_support_switch return FALSE\n");
return (FALSE);
}
/*******************************************************************************
**
** Function btm_find_dev_by_handle
**
** Description Look for the record in the device database for the record
** with specified handle
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_find_dev_by_handle (UINT16 handle)
{
tBTM_SEC_DEV_REC *p_dev_rec = &btm_cb.sec_dev_rec[0];
int i;
for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) {
if ((p_dev_rec->sec_flags & BTM_SEC_IN_USE)
&& ((p_dev_rec->hci_handle == handle)
#if BLE_INCLUDED == TRUE
|| (p_dev_rec->ble_hci_handle == handle)
#endif
)) {
return (p_dev_rec);
}
}
return (NULL);
}
/*******************************************************************************
**
** Function btm_find_dev
**
** Description Look for the record in the device database for the record
** with specified BD address
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_find_dev(BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec = &btm_cb.sec_dev_rec[0];
if (bd_addr) {
for (uint8_t i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) {
if (p_dev_rec->sec_flags & BTM_SEC_IN_USE) {
if (!memcmp (p_dev_rec->bd_addr, bd_addr, BD_ADDR_LEN)) {
return (p_dev_rec);
}
#if BLE_INCLUDED == TRUE
// If a LE random address is looking for device record
if (!memcmp(p_dev_rec->ble.pseudo_addr, bd_addr, BD_ADDR_LEN)) {
return (p_dev_rec);
}
if (btm_ble_addr_resolvable(bd_addr, p_dev_rec)) {
return (p_dev_rec);
}
#endif
}
}
}
return (NULL);
}
/*******************************************************************************
**
** Function btm_consolidate_dev
**
** Description combine security records if identified as same peer
**
** Returns none
**
*******************************************************************************/
void btm_consolidate_dev(tBTM_SEC_DEV_REC *p_target_rec)
{
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
tBTM_SEC_DEV_REC *p_dev_rec = &btm_cb.sec_dev_rec[0];
tBTM_SEC_DEV_REC temp_rec = *p_target_rec;
BTM_TRACE_DEBUG("%s\n", __func__);
for (uint8_t i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) {
if (p_target_rec != p_dev_rec && p_dev_rec->sec_flags & BTM_SEC_IN_USE) {
if (!memcmp (p_dev_rec->bd_addr, p_target_rec->bd_addr, BD_ADDR_LEN)) {
memcpy(p_target_rec, p_dev_rec, sizeof(tBTM_SEC_DEV_REC));
p_target_rec->ble = temp_rec.ble;
p_target_rec->ble_hci_handle = temp_rec.ble_hci_handle;
p_target_rec->enc_key_size = temp_rec.enc_key_size;
p_target_rec->conn_params = temp_rec.conn_params;
p_target_rec->device_type |= temp_rec.device_type;
p_target_rec->sec_flags |= temp_rec.sec_flags;
p_target_rec->new_encryption_key_is_p256 = temp_rec.new_encryption_key_is_p256;
p_target_rec->no_smp_on_br = temp_rec.no_smp_on_br;
p_target_rec->bond_type = temp_rec.bond_type;
/* mark the combined record as unused */
p_dev_rec->sec_flags &= ~BTM_SEC_IN_USE;
p_dev_rec->bond_type = BOND_TYPE_UNKNOWN;
break;
}
/* an RPA device entry is a duplicate of the target record */
if (btm_ble_addr_resolvable(p_dev_rec->bd_addr, p_target_rec)) {
if (memcmp(p_target_rec->ble.pseudo_addr, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0) {
p_target_rec->ble.ble_addr_type = p_dev_rec->ble.ble_addr_type;
p_target_rec->device_type |= p_dev_rec->device_type;
p_dev_rec->sec_flags &= ~BTM_SEC_IN_USE;
p_dev_rec->bond_type = BOND_TYPE_UNKNOWN;
}
break;
}
}
}
#endif
}
/*******************************************************************************
**
** Function btm_find_or_alloc_dev
**
** Description Look for the record in the device database for the record
** with specified BD address
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_find_or_alloc_dev (BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec;
BTM_TRACE_EVENT ("btm_find_or_alloc_dev\n");
if ((p_dev_rec = btm_find_dev (bd_addr)) == NULL) {
/* Allocate a new device record or reuse the oldest one */
p_dev_rec = btm_sec_alloc_dev (bd_addr);
}
return (p_dev_rec);
}
/*******************************************************************************
**
** Function btm_find_oldest_dev
**
** Description Locates the oldest device in use. It first looks for
** the oldest non-paired device. If all devices are paired it
** deletes the oldest paired device.
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_find_oldest_dev (void)
{
tBTM_SEC_DEV_REC *p_dev_rec = &btm_cb.sec_dev_rec[0];
tBTM_SEC_DEV_REC *p_oldest = p_dev_rec;
UINT32 ot = 0xFFFFFFFF;
int i;
/* First look for the non-paired devices for the oldest entry */
for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) {
if (((p_dev_rec->sec_flags & BTM_SEC_IN_USE) == 0)
|| ((p_dev_rec->sec_flags & (BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LE_LINK_KEY_KNOWN)) != 0)) {
continue; /* Device is paired so skip it */
}
if (p_dev_rec->timestamp < ot) {
p_oldest = p_dev_rec;
ot = p_dev_rec->timestamp;
}
}
if (ot != 0xFFFFFFFF) {
return (p_oldest);
}
/* All devices are paired; find the oldest */
p_dev_rec = &btm_cb.sec_dev_rec[0];
for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) {
if ((p_dev_rec->sec_flags & BTM_SEC_IN_USE) == 0) {
continue;
}
if (p_dev_rec->timestamp < ot) {
p_oldest = p_dev_rec;
ot = p_dev_rec->timestamp;
}
}
return (p_oldest);
}
/*******************************************************************************
**
** Function btm_get_bond_type_dev
**
** Description Get the bond type for a device in the device database
** with specified BD address
**
** Returns The device bond type if known, otherwise BOND_TYPE_UNKNOWN
**
*******************************************************************************/
tBTM_BOND_TYPE btm_get_bond_type_dev(BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == NULL) {
return BOND_TYPE_UNKNOWN;
}
return p_dev_rec->bond_type;
}
/*******************************************************************************
**
** Function btm_set_bond_type_dev
**
** Description Set the bond type for a device in the device database
** with specified BD address
**
** Returns TRUE on success, otherwise FALSE
**
*******************************************************************************/
BOOLEAN btm_set_bond_type_dev(BD_ADDR bd_addr, tBTM_BOND_TYPE bond_type)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == NULL) {
return FALSE;
}
p_dev_rec->bond_type = bond_type;
return TRUE;
}
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