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Merge branch 'feat/support_bluedroid_dual_identify' into 'master'
feat(ble/bluedroid): Support bluedroid dual indentify See merge request espressif/esp-idf!49640
This commit is contained in:
Zhi Wei Jian
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/******************************************************************************
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*
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* Copyright (C) 2026 Espressif Systems (Shanghai) CO LTD
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* Peripheral dual local-identity bond isolation: Host-internal pseudo
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* address derivation and the per-connection identity side table.
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*
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* A pseudo address is a 6-byte Host-only key computed from
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* (local_identity, peer). It lets one peer phone that connects through two
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* distinct local identities (e.g. Public and a fixed Static Random adv set)
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* appear as two independent peers inside the Host (separate device record,
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* LTK and NVS bond section). The over-the-air and SMP cryptography keep
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* using the real peer and the real local identity; the pseudo never leaves
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* the Host.
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*
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******************************************************************************/
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#ifndef BTM_BLE_PSEUDO_H
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#define BTM_BLE_PSEUDO_H
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#include "common/bt_target.h"
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#include "stack/bt_types.h"
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#if (BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE && BLE_PERIPH_PSEUDO_ADDR_BOND == TRUE)
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#include "common/bt_trace.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Debug logging for the pseudo-address bond feature. Routed through the Host
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* BTM trace macro so the "[PSEUDO]" lines follow the standard Bluetooth log
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* level (BT_LOG_LEVEL_BTM) like the rest of the stack. */
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#define BLE_PSEUDO_DBG(fmt, ...) BTM_TRACE_DEBUG("[PSEUDO] " fmt, ##__VA_ARGS__)
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/* Helper to print a BD_ADDR without a MACSTR dependency. */
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#define BLE_PSEUDO_BDA(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
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#define BLE_PSEUDO_BDA_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
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/* Bump when the pseudo derivation input layout or algorithm changes (e.g. v1
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* was SHA-256 truncated; v2 is AES-CMAC via the configured SMP crypto backend).
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* Persisted in the input/key so a mismatch yields a different pseudo. */
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#define BLE_PSEUDO_SCHEME_VER 2
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/* Identity that produced one connection: the resolved real peer plus the
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* local identity (Public or fixed Static Random) of the adv set / link. */
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typedef struct {
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BD_ADDR local; /* local identity (NOT a transient RPA) */
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BD_ADDR peer; /* resolved real peer identity */
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tBLE_ADDR_TYPE local_type;
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tBLE_ADDR_TYPE peer_type;
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} tBLE_CONN_IDENTITY;
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/* Per-connection side table entry, keyed by HCI handle. */
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typedef struct {
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UINT16 handle;
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BD_ADDR pseudo;
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tBLE_CONN_IDENTITY id;
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BOOLEAN local_ready; /* TRUE once local identity finalized */
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BOOLEAN in_use;
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} tBTM_BLE_CONN_IDENTITY;
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/*******************************************************************************
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** Function btm_ble_identity_to_pseudo
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**
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** Description Deterministically derive a 6-byte Host pseudo address from
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** (local identity || peer). Same input always yields the same
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** output. The result is forced to Static-Random format (top
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** two bits = 11) so it can never be mistaken for a resolvable
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** RPA by btm_find_dev()/btm_ble_addr_resolvable().
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*******************************************************************************/
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void btm_ble_identity_to_pseudo(const tBLE_CONN_IDENTITY *p_id, BD_ADDR pseudo);
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/*******************************************************************************
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** Function btm_ble_pseudo_init / btm_ble_pseudo_deinit
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*******************************************************************************/
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void btm_ble_pseudo_init(void);
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void btm_ble_pseudo_deinit(void);
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/*******************************************************************************
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** Function btm_ble_conn_identity_register
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**
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** Description Record (handle -> pseudo, identity). If an entry for the
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** handle already exists it is updated. Returns FALSE when the
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** table is full.
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*******************************************************************************/
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BOOLEAN btm_ble_conn_identity_register(UINT16 handle,
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const tBLE_CONN_IDENTITY *p_id,
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const BD_ADDR pseudo,
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BOOLEAN local_ready);
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/*******************************************************************************
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** Function btm_ble_conn_identity_unregister
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*******************************************************************************/
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void btm_ble_conn_identity_unregister(UINT16 handle);
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/*******************************************************************************
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** Function btm_ble_conn_identity_get_by_handle / get_by_pseudo
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**
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** Description Copy-out snapshot of a side-table entry. Safe from any task.
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*******************************************************************************/
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BOOLEAN btm_ble_conn_identity_get_by_handle(UINT16 handle, tBTM_BLE_CONN_IDENTITY *p_out);
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BOOLEAN btm_ble_conn_identity_get_by_pseudo(const BD_ADDR pseudo, tBTM_BLE_CONN_IDENTITY *p_out);
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/*******************************************************************************
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** Function btm_ble_conn_identity_exists_by_handle
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*******************************************************************************/
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BOOLEAN btm_ble_conn_identity_exists_by_handle(UINT16 handle);
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/*******************************************************************************
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** Function btm_ble_pseudo_to_real_peer
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**
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** Description Reverse map a pseudo back to the real peer. Returns TRUE if
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** the pseudo is known.
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*******************************************************************************/
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BOOLEAN btm_ble_pseudo_to_real_peer(const BD_ADDR pseudo, BD_ADDR real_peer);
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/*******************************************************************************
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** Function btm_ble_pseudo_finalize_local
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**
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** Description Second-phase finalize, called from the LE Advertising Set
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** Terminated handler. Re-keys a link to its pseudo when the
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** ext-adv instance was not resolvable at connection complete.
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** Defined in btm_ble.c.
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*******************************************************************************/
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void btm_ble_pseudo_finalize_local(UINT16 handle);
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/*******************************************************************************
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** Function btm_ble_pseudo_apply_identity
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**
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** Description Re-key a link from a transient-RPA-derived pseudo to the
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** stable f(local, peer Identity) pseudo once the peer's
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** Identity Address (PID) is learned during pairing. Returns
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** TRUE and fills new_pseudo when the pseudo changed so the
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** SMP caller can keep smp_cb.pairing_bda consistent.
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*******************************************************************************/
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BOOLEAN btm_ble_pseudo_apply_identity(UINT16 handle, const BD_ADDR identity,
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UINT8 id_type, BD_ADDR new_pseudo);
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#ifdef __cplusplus
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}
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#endif
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#endif /* BLE_INCLUDED && SMP_INCLUDED && BLE_PERIPH_PSEUDO_ADDR_BOND */
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#endif /* BTM_BLE_PSEUDO_H */
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@@ -624,6 +624,12 @@ typedef struct {
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BD_ADDR current_addr; /* current adv addr*/
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bool current_addr_valid; /* current addr info is valid or not*/
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#endif
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#if (BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE && BLE_PERIPH_PSEUDO_ADDR_BOND == TRUE)
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BOOLEAN is_pseudo_bond; /* record is keyed by a Host pseudo
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* (dual local-identity bond); never
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* consolidate it onto the peer
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* Identity or its LTK is lost */
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#endif
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} tBTM_SEC_BLE;
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@@ -1282,6 +1288,7 @@ void btm_page_to_setup_timeout (void *p_tle);
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BOOLEAN btm_dev_support_switch (BD_ADDR bd_addr);
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tBTM_SEC_DEV_REC *btm_sec_alloc_dev (BD_ADDR bd_addr);
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tBTM_SEC_DEV_REC *btm_sec_alloc_dev_ex (BD_ADDR bd_addr, tBTM_SEC_DEV_REC *exclude_rec);
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void btm_sec_free_dev (tBTM_SEC_DEV_REC *p_dev_rec, tBT_TRANSPORT transport);
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tBTM_SEC_DEV_REC *btm_find_dev (BD_ADDR bd_addr);
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tBTM_SEC_DEV_REC *btm_find_or_alloc_dev (BD_ADDR bd_addr);
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