| /****************************************************************************** |
| * |
| * Copyright (C) 2009-2012 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 GATT database building and query functions |
| * |
| ******************************************************************************/ |
| |
| #include "bt_target.h" |
| |
| #include "bt_trace.h" |
| #include "bt_utils.h" |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include "btm_int.h" |
| #include "gatt_int.h" |
| #include "l2c_api.h" |
| #include "osi/include/osi.h" |
| |
| /******************************************************************************* |
| * L O C A L F U N C T I O N P R O T O T Y P E S * |
| ******************************************************************************/ |
| static bool allocate_svc_db_buf(tGATT_SVC_DB* p_db); |
| static void* allocate_attr_in_db(tGATT_SVC_DB* p_db, tBT_UUID* p_uuid, |
| tGATT_PERM perm); |
| static bool deallocate_attr_in_db(tGATT_SVC_DB* p_db, void* p_attr); |
| static bool copy_extra_byte_in_db(tGATT_SVC_DB* p_db, void** p_dst, |
| uint16_t len); |
| |
| static bool gatts_db_add_service_declaration(tGATT_SVC_DB* p_db, |
| tBT_UUID* p_service, bool is_pri); |
| static tGATT_STATUS gatts_send_app_read_request( |
| tGATT_TCB* p_tcb, uint8_t op_code, uint16_t handle, uint16_t offset, |
| uint32_t trans_id, bt_gatt_db_attribute_type_t gatt_type); |
| |
| /******************************************************************************* |
| * |
| * Function gatts_init_service_db |
| * |
| * Description Initialize a memory space to be a service database. |
| * |
| * Parameter p_db: database pointer. |
| * len: size of the memory space. |
| * |
| * Returns Status of te operation. |
| * |
| ******************************************************************************/ |
| bool gatts_init_service_db(tGATT_SVC_DB* p_db, tBT_UUID* p_service, bool is_pri, |
| uint16_t s_hdl, uint16_t num_handle) { |
| p_db->svc_buffer = fixed_queue_new(SIZE_MAX); |
| |
| if (!allocate_svc_db_buf(p_db)) { |
| GATT_TRACE_ERROR("gatts_init_service_db failed, no resources"); |
| return false; |
| } |
| |
| GATT_TRACE_DEBUG("gatts_init_service_db"); |
| GATT_TRACE_DEBUG("s_hdl = %d num_handle = %d", s_hdl, num_handle); |
| |
| /* update service database information */ |
| p_db->next_handle = s_hdl; |
| p_db->end_handle = s_hdl + num_handle; |
| |
| return gatts_db_add_service_declaration(p_db, p_service, is_pri); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatts_init_service_db |
| * |
| * Description Initialize a memory space to be a service database. |
| * |
| * Parameter p_db: database pointer. |
| * len: size of the memory space. |
| * |
| * Returns Status of te operation. |
| * |
| ******************************************************************************/ |
| tBT_UUID* gatts_get_service_uuid(tGATT_SVC_DB* p_db) { |
| if (!p_db || !p_db->p_attr_list) { |
| GATT_TRACE_ERROR("service DB empty"); |
| |
| return NULL; |
| } else { |
| return &((tGATT_ATTR*)p_db->p_attr_list)->p_value->uuid; |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatts_check_attr_readability |
| * |
| * Description check attribute readability |
| * |
| * Returns status of operation. |
| * |
| ******************************************************************************/ |
| static tGATT_STATUS gatts_check_attr_readability(tGATT_ATTR* p_attr, |
| UNUSED_ATTR uint16_t offset, |
| bool read_long, |
| tGATT_SEC_FLAG sec_flag, |
| uint8_t key_size) { |
| uint16_t min_key_size; |
| tGATT_PERM perm = p_attr->permission; |
| |
| min_key_size = (((perm & GATT_ENCRYPT_KEY_SIZE_MASK) >> 12)); |
| if (min_key_size != 0) { |
| min_key_size += 6; |
| } |
| |
| if (!(perm & GATT_READ_ALLOWED)) { |
| GATT_TRACE_ERROR("%s: GATT_READ_NOT_PERMIT", __func__); |
| return GATT_READ_NOT_PERMIT; |
| } |
| |
| if ((perm & GATT_READ_AUTH_REQUIRED) && |
| !(sec_flag & GATT_SEC_FLAG_LKEY_UNAUTHED) && |
| !(sec_flag & BTM_SEC_FLAG_ENCRYPTED)) { |
| GATT_TRACE_ERROR("%s: GATT_INSUF_AUTHENTICATION", __func__); |
| return GATT_INSUF_AUTHENTICATION; |
| } |
| |
| if ((perm & GATT_READ_MITM_REQUIRED) && |
| !(sec_flag & GATT_SEC_FLAG_LKEY_AUTHED)) { |
| GATT_TRACE_ERROR("%s: GATT_INSUF_AUTHENTICATION: MITM Required", __func__); |
| return GATT_INSUF_AUTHENTICATION; |
| } |
| |
| if ((perm & GATT_READ_ENCRYPTED_REQUIRED) && |
| !(sec_flag & GATT_SEC_FLAG_ENCRYPTED)) { |
| GATT_TRACE_ERROR("%s: GATT_INSUF_ENCRYPTION", __func__); |
| return GATT_INSUF_ENCRYPTION; |
| } |
| |
| if ((perm & GATT_READ_ENCRYPTED_REQUIRED) && |
| (sec_flag & GATT_SEC_FLAG_ENCRYPTED) && (key_size < min_key_size)) { |
| GATT_TRACE_ERROR("%s: GATT_INSUF_KEY_SIZE", __func__); |
| return GATT_INSUF_KEY_SIZE; |
| } |
| |
| if (read_long && p_attr->uuid.len == LEN_UUID_16) { |
| switch (p_attr->uuid.uu.uuid16) { |
| case GATT_UUID_PRI_SERVICE: |
| case GATT_UUID_SEC_SERVICE: |
| case GATT_UUID_CHAR_DECLARE: |
| case GATT_UUID_INCLUDE_SERVICE: |
| case GATT_UUID_CHAR_EXT_PROP: |
| case GATT_UUID_CHAR_CLIENT_CONFIG: |
| case GATT_UUID_CHAR_SRVR_CONFIG: |
| case GATT_UUID_CHAR_PRESENT_FORMAT: |
| GATT_TRACE_ERROR("%s: GATT_NOT_LONG", __func__); |
| return GATT_NOT_LONG; |
| |
| default: |
| break; |
| } |
| } |
| |
| return GATT_SUCCESS; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function read_attr_value |
| * |
| * Description Utility function to read an attribute value. |
| * |
| * Parameter p_attr: pointer to the attribute to read. |
| * offset: read offset. |
| * p_value: output parameter to carry out the attribute value. |
| * p_len: output parameter to carry out the attribute length. |
| * read_long: this is a read blob request. |
| * mtu: MTU |
| * sec_flag: current link security status. |
| * key_size: encryption key size. |
| * |
| * Returns status of operation. |
| * |
| ******************************************************************************/ |
| static tGATT_STATUS read_attr_value(void* p_attr, uint16_t offset, |
| uint8_t** p_data, bool read_long, |
| uint16_t mtu, uint16_t* p_len, |
| tGATT_SEC_FLAG sec_flag, uint8_t key_size) { |
| uint16_t len = 0, uuid16 = 0; |
| uint8_t* p = *p_data; |
| tGATT_STATUS status; |
| tGATT_ATTR* p_attr16 = (tGATT_ATTR*)p_attr; |
| |
| GATT_TRACE_DEBUG( |
| "read_attr_value uuid=0x%04x perm=0x%02x sec_flag=0x%x offset=%d " |
| "read_long=%d", |
| p_attr16->uuid, p_attr16->permission, sec_flag, offset, read_long); |
| |
| status = gatts_check_attr_readability((tGATT_ATTR*)p_attr, offset, read_long, |
| sec_flag, key_size); |
| |
| if (status != GATT_SUCCESS) return status; |
| |
| if (p_attr16->uuid.len == LEN_UUID_16) uuid16 = p_attr16->uuid.uu.uuid16; |
| |
| status = GATT_NO_RESOURCES; |
| |
| if (uuid16 == GATT_UUID_PRI_SERVICE || uuid16 == GATT_UUID_SEC_SERVICE) { |
| len = p_attr16->p_value->uuid.len; |
| if (mtu >= p_attr16->p_value->uuid.len) { |
| gatt_build_uuid_to_stream(&p, p_attr16->p_value->uuid); |
| status = GATT_SUCCESS; |
| } |
| } else if (uuid16 == GATT_UUID_CHAR_DECLARE) { |
| len = (((tGATT_ATTR*)(p_attr16->p_next))->uuid.len == LEN_UUID_16) ? 5 : 19; |
| |
| if (mtu >= len) { |
| UINT8_TO_STREAM(p, p_attr16->p_value->char_decl.property); |
| UINT16_TO_STREAM(p, p_attr16->p_value->char_decl.char_val_handle); |
| |
| if (((tGATT_ATTR*)(p_attr16->p_next))->uuid.len == LEN_UUID_16) { |
| UINT16_TO_STREAM(p, ((tGATT_ATTR*)(p_attr16->p_next))->uuid.uu.uuid16); |
| } |
| /* convert a 32bits UUID to 128 bits */ |
| else if (((tGATT_ATTR*)(p_attr16->p_next))->uuid.len == LEN_UUID_32) { |
| gatt_convert_uuid32_to_uuid128( |
| p, ((tGATT_ATTR*)(p_attr16->p_next))->uuid.uu.uuid32); |
| p += LEN_UUID_128; |
| } else { |
| ARRAY_TO_STREAM(p, ((tGATT_ATTR*)(p_attr16->p_next))->uuid.uu.uuid128, |
| LEN_UUID_128); |
| } |
| status = GATT_SUCCESS; |
| } |
| |
| } else if (uuid16 == GATT_UUID_INCLUDE_SERVICE) { |
| if (p_attr16->p_value->incl_handle.service_type.len == LEN_UUID_16) |
| len = 6; |
| else |
| len = 4; |
| |
| if (mtu >= len) { |
| UINT16_TO_STREAM(p, p_attr16->p_value->incl_handle.s_handle); |
| UINT16_TO_STREAM(p, p_attr16->p_value->incl_handle.e_handle); |
| |
| if (p_attr16->p_value->incl_handle.service_type.len == LEN_UUID_16) { |
| UINT16_TO_STREAM(p, |
| p_attr16->p_value->incl_handle.service_type.uu.uuid16); |
| } |
| status = GATT_SUCCESS; |
| } |
| } else /* characteristic description or characteristic value */ |
| { |
| status = GATT_PENDING; |
| } |
| |
| *p_len = len; |
| *p_data = p; |
| return status; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatts_db_read_attr_value_by_type |
| * |
| * Description Query attribute value by attribute type. |
| * |
| * Parameter p_db: pointer to the attribute database. |
| * p_rsp: Read By type response data. |
| * s_handle: starting handle of the range we are looking for. |
| * e_handle: ending handle of the range we are looking for. |
| * type: Attribute type. |
| * mtu: MTU. |
| * sec_flag: current link security status. |
| * key_size: encryption key size. |
| * |
| * Returns Status of the operation. |
| * |
| ******************************************************************************/ |
| tGATT_STATUS gatts_db_read_attr_value_by_type( |
| tGATT_TCB* p_tcb, tGATT_SVC_DB* p_db, uint8_t op_code, BT_HDR* p_rsp, |
| uint16_t s_handle, uint16_t e_handle, tBT_UUID type, uint16_t* p_len, |
| tGATT_SEC_FLAG sec_flag, uint8_t key_size, uint32_t trans_id, |
| uint16_t* p_cur_handle) { |
| tGATT_STATUS status = GATT_NOT_FOUND; |
| tGATT_ATTR* p_attr; |
| uint16_t len = 0; |
| uint8_t* p = (uint8_t*)(p_rsp + 1) + p_rsp->len + L2CAP_MIN_OFFSET; |
| tBT_UUID attr_uuid; |
| |
| if (p_db && p_db->p_attr_list) { |
| p_attr = (tGATT_ATTR*)p_db->p_attr_list; |
| |
| while (p_attr && p_attr->handle <= e_handle) { |
| attr_uuid = p_attr->uuid; |
| |
| if (p_attr->handle >= s_handle && gatt_uuid_compare(type, attr_uuid)) { |
| if (*p_len <= 2) { |
| status = GATT_NO_RESOURCES; |
| break; |
| } |
| |
| UINT16_TO_STREAM(p, p_attr->handle); |
| |
| status = |
| read_attr_value((void*)p_attr, 0, &p, false, (uint16_t)(*p_len - 2), |
| &len, sec_flag, key_size); |
| |
| if (status == GATT_PENDING) { |
| status = gatts_send_app_read_request(p_tcb, op_code, p_attr->handle, |
| 0, trans_id, p_attr->gatt_type); |
| |
| /* one callback at a time */ |
| break; |
| } else if (status == GATT_SUCCESS) { |
| if (p_rsp->offset == 0) p_rsp->offset = len + 2; |
| |
| if (p_rsp->offset == len + 2) { |
| p_rsp->len += (len + 2); |
| *p_len -= (len + 2); |
| } else { |
| GATT_TRACE_ERROR("format mismatch"); |
| status = GATT_NO_RESOURCES; |
| break; |
| } |
| } else { |
| *p_cur_handle = p_attr->handle; |
| break; |
| } |
| } |
| p_attr = (tGATT_ATTR*)p_attr->p_next; |
| } |
| } |
| |
| #if (BLE_DELAY_REQUEST_ENC == TRUE) |
| uint8_t flag = 0; |
| if (BTM_GetSecurityFlags(p_tcb->peer_bda, &flag)) { |
| if ((p_tcb->att_lcid == L2CAP_ATT_CID) && (status == GATT_PENDING) && |
| (type.uu.uuid16 == GATT_UUID_GAP_DEVICE_NAME)) { |
| if ((flag & (BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_FLAG_ENCRYPTED)) == |
| BTM_SEC_LINK_KEY_KNOWN) { |
| tACL_CONN* p = btm_bda_to_acl(p_tcb->peer_bda, BT_TRANSPORT_LE); |
| if ((p != NULL) && (p->link_role == BTM_ROLE_MASTER)) |
| btm_ble_set_encryption(p_tcb->peer_bda, BTM_BLE_SEC_ENCRYPT, |
| p->link_role); |
| } |
| } |
| } |
| #endif |
| return status; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatts_add_included_service |
| * |
| * Description This function adds an included service into a database. |
| * |
| * Parameter p_db: database pointer. |
| * inc_srvc_type: included service type. |
| * |
| * Returns Status of the operation. |
| * |
| ******************************************************************************/ |
| uint16_t gatts_add_included_service(tGATT_SVC_DB* p_db, uint16_t s_handle, |
| uint16_t e_handle, tBT_UUID service) { |
| tGATT_ATTR* p_attr; |
| tBT_UUID uuid = {LEN_UUID_16, {GATT_UUID_INCLUDE_SERVICE}}; |
| |
| GATT_TRACE_DEBUG( |
| "gatts_add_included_service: s_hdl = 0x%04x e_hdl = 0x%04x uuid = 0x%04x", |
| s_handle, e_handle, service.uu.uuid16); |
| |
| if (service.len == 0 || s_handle == 0 || e_handle == 0) { |
| GATT_TRACE_ERROR("gatts_add_included_service Illegal Params."); |
| return 0; |
| } |
| |
| p_attr = (tGATT_ATTR*)allocate_attr_in_db(p_db, &uuid, GATT_PERM_READ); |
| if (p_attr != NULL) { |
| if (copy_extra_byte_in_db(p_db, (void**)&p_attr->p_value, |
| sizeof(tGATT_INCL_SRVC))) { |
| p_attr->p_value->incl_handle.s_handle = s_handle; |
| p_attr->p_value->incl_handle.e_handle = e_handle; |
| memcpy(&p_attr->p_value->incl_handle.service_type, &service, |
| sizeof(tBT_UUID)); |
| |
| return p_attr->handle; |
| } else { |
| deallocate_attr_in_db(p_db, p_attr); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatts_add_characteristic |
| * |
| * Description This function add a characteristics and its descriptor into |
| * a servce identified by the service database pointer. |
| * |
| * Parameter p_db: database pointer. |
| * perm: permission (authentication and key size requirements) |
| * property: property of the characteristic. |
| * p_char: characteristic value information. |
| * |
| * Returns Status of te operation. |
| * |
| ******************************************************************************/ |
| uint16_t gatts_add_characteristic(tGATT_SVC_DB* p_db, tGATT_PERM perm, |
| tGATT_CHAR_PROP property, |
| tBT_UUID* p_char_uuid) { |
| tGATT_ATTR *p_char_decl, *p_char_val; |
| tBT_UUID uuid = {LEN_UUID_16, {GATT_UUID_CHAR_DECLARE}}; |
| |
| GATT_TRACE_DEBUG("%s: perm=0x%0x property=0x%0x", __func__, perm, property); |
| |
| p_char_decl = (tGATT_ATTR*)allocate_attr_in_db(p_db, &uuid, GATT_PERM_READ); |
| if (p_char_decl != NULL) { |
| if (!copy_extra_byte_in_db(p_db, (void**)&p_char_decl->p_value, |
| sizeof(tGATT_CHAR_DECL))) { |
| deallocate_attr_in_db(p_db, p_char_decl); |
| return 0; |
| } |
| |
| p_char_val = (tGATT_ATTR*)allocate_attr_in_db(p_db, p_char_uuid, perm); |
| |
| if (p_char_val == NULL) { |
| deallocate_attr_in_db(p_db, p_char_decl); |
| return 0; |
| } |
| |
| p_char_decl->p_value->char_decl.property = property; |
| p_char_decl->p_value->char_decl.char_val_handle = p_char_val->handle; |
| |
| p_char_val->gatt_type = BTGATT_DB_CHARACTERISTIC; |
| p_char_val->p_value = NULL; |
| |
| return p_char_val->handle; |
| } |
| |
| return 0; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatt_convertchar_descr_type |
| * |
| * Description Convert a char descript UUID into descriptor type. |
| * |
| * Returns descriptor type. |
| * |
| ******************************************************************************/ |
| uint8_t gatt_convertchar_descr_type(tBT_UUID* p_descr_uuid) { |
| tBT_UUID std_descr = {LEN_UUID_16, {GATT_UUID_CHAR_EXT_PROP}}; |
| |
| if (gatt_uuid_compare(std_descr, *p_descr_uuid)) |
| return GATT_DESCR_EXT_DSCPTOR; |
| |
| std_descr.uu.uuid16++; |
| if (gatt_uuid_compare(std_descr, *p_descr_uuid)) |
| return GATT_DESCR_USER_DSCPTOR; |
| |
| std_descr.uu.uuid16++; |
| if (gatt_uuid_compare(std_descr, *p_descr_uuid)) return GATT_DESCR_CLT_CONFIG; |
| |
| std_descr.uu.uuid16++; |
| if (gatt_uuid_compare(std_descr, *p_descr_uuid)) return GATT_DESCR_SVR_CONFIG; |
| |
| std_descr.uu.uuid16++; |
| if (gatt_uuid_compare(std_descr, *p_descr_uuid)) |
| return GATT_DESCR_PRES_FORMAT; |
| |
| std_descr.uu.uuid16++; |
| if (gatt_uuid_compare(std_descr, *p_descr_uuid)) |
| return GATT_DESCR_AGGR_FORMAT; |
| |
| std_descr.uu.uuid16++; |
| if (gatt_uuid_compare(std_descr, *p_descr_uuid)) |
| return GATT_DESCR_VALID_RANGE; |
| |
| return GATT_DESCR_UNKNOWN; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatts_add_char_descr |
| * |
| * Description This function add a characteristics descriptor. |
| * |
| * Parameter p_db: database pointer. |
| * perm: characteristic descriptor permission type. |
| * char_dscp_tpye: the characteristic descriptor masks. |
| * p_dscp_params: characteristic descriptors values. |
| * |
| * Returns Status of the operation. |
| * |
| ******************************************************************************/ |
| uint16_t gatts_add_char_descr(tGATT_SVC_DB* p_db, tGATT_PERM perm, |
| tBT_UUID* p_descr_uuid) { |
| tGATT_ATTR* p_char_dscptr; |
| |
| GATT_TRACE_DEBUG("gatts_add_char_descr uuid=0x%04x", p_descr_uuid->uu.uuid16); |
| |
| /* Add characteristic descriptors */ |
| p_char_dscptr = (tGATT_ATTR*)allocate_attr_in_db(p_db, p_descr_uuid, perm); |
| if (p_char_dscptr == NULL) { |
| GATT_TRACE_DEBUG("gatts_add_char_descr Fail for adding char descriptors."); |
| return 0; |
| } else { |
| p_char_dscptr->gatt_type = BTGATT_DB_DESCRIPTOR; |
| return p_char_dscptr->handle; |
| } |
| } |
| |
| /******************************************************************************/ |
| /* Service Attribute Database Query Utility Functions */ |
| /******************************************************************************/ |
| /******************************************************************************* |
| * |
| * Function gatts_read_attr_value_by_handle |
| * |
| * Description Query attribute value by attribute handle. |
| * |
| * Parameter p_db: pointer to the attribute database. |
| * handle: Attribute handle to read. |
| * offset: Read offset. |
| * p_value: output parameter to carry out the attribute value. |
| * p_len: output parameter as attribute length read. |
| * read_long: this is a read blob request. |
| * mtu: MTU. |
| * sec_flag: current link security status. |
| * key_size: encryption key size |
| * |
| * Returns Status of operation. |
| * |
| ******************************************************************************/ |
| tGATT_STATUS gatts_read_attr_value_by_handle( |
| tGATT_TCB* p_tcb, tGATT_SVC_DB* p_db, uint8_t op_code, uint16_t handle, |
| uint16_t offset, uint8_t* p_value, uint16_t* p_len, uint16_t mtu, |
| tGATT_SEC_FLAG sec_flag, uint8_t key_size, uint32_t trans_id) { |
| tGATT_STATUS status = GATT_NOT_FOUND; |
| tGATT_ATTR* p_attr; |
| uint8_t* pp = p_value; |
| |
| if (p_db && p_db->p_attr_list) { |
| p_attr = (tGATT_ATTR*)p_db->p_attr_list; |
| |
| while (p_attr && handle >= p_attr->handle) { |
| if (p_attr->handle == handle) { |
| status = read_attr_value(p_attr, offset, &pp, |
| (bool)(op_code == GATT_REQ_READ_BLOB), mtu, |
| p_len, sec_flag, key_size); |
| |
| if (status == GATT_PENDING) { |
| status = |
| gatts_send_app_read_request(p_tcb, op_code, p_attr->handle, |
| offset, trans_id, p_attr->gatt_type); |
| } |
| break; |
| } |
| p_attr = (tGATT_ATTR*)p_attr->p_next; |
| } |
| } |
| |
| return status; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatts_read_attr_perm_check |
| * |
| * Description Check attribute readability. |
| * |
| * Parameter p_db: pointer to the attribute database. |
| * handle: Attribute handle to read. |
| * offset: Read offset. |
| * p_value: output parameter to carry out the attribute value. |
| * p_len: output parameter as attribute length read. |
| * read_long: this is a read blob request. |
| * mtu: MTU. |
| * sec_flag: current link security status. |
| * key_size: encryption key size |
| * |
| * Returns Status of operation. |
| * |
| ******************************************************************************/ |
| tGATT_STATUS gatts_read_attr_perm_check(tGATT_SVC_DB* p_db, bool is_long, |
| uint16_t handle, |
| tGATT_SEC_FLAG sec_flag, |
| uint8_t key_size) { |
| tGATT_STATUS status = GATT_NOT_FOUND; |
| tGATT_ATTR* p_attr; |
| |
| if (p_db && p_db->p_attr_list) { |
| p_attr = (tGATT_ATTR*)p_db->p_attr_list; |
| |
| while (p_attr && handle >= p_attr->handle) { |
| if (p_attr->handle == handle) { |
| status = gatts_check_attr_readability(p_attr, 0, is_long, sec_flag, |
| key_size); |
| break; |
| } |
| p_attr = (tGATT_ATTR*)p_attr->p_next; |
| } |
| } |
| |
| return status; |
| } |
| /******************************************************************************* |
| * |
| * Function gatts_write_attr_perm_check |
| * |
| * Description Write attribute value into database. |
| * |
| * Parameter p_db: pointer to the attribute database. |
| * op_code:op code of this write. |
| * handle: handle of the attribute to write. |
| * offset: Write offset if write op code is write blob. |
| * p_data: Attribute value to write. |
| * len: attribute data length. |
| * sec_flag: current link security status. |
| * key_size: encryption key size |
| * |
| * Returns Status of the operation. |
| * |
| ******************************************************************************/ |
| tGATT_STATUS gatts_write_attr_perm_check(tGATT_SVC_DB* p_db, uint8_t op_code, |
| uint16_t handle, uint16_t offset, |
| uint8_t* p_data, uint16_t len, |
| tGATT_SEC_FLAG sec_flag, |
| uint8_t key_size) { |
| tGATT_STATUS status = GATT_NOT_FOUND; |
| tGATT_ATTR* p_attr; |
| uint16_t max_size = 0; |
| tGATT_PERM perm; |
| uint16_t min_key_size; |
| |
| GATT_TRACE_DEBUG( |
| "%s: op_code=0x%0x handle=0x%04x offset=%d len=%d sec_flag=0x%0x " |
| "key_size=%d", |
| __func__, op_code, handle, offset, len, sec_flag, key_size); |
| |
| if (p_db != NULL) { |
| p_attr = (tGATT_ATTR*)p_db->p_attr_list; |
| |
| while (p_attr != NULL) { |
| if (p_attr->handle == handle) { |
| perm = p_attr->permission; |
| min_key_size = (((perm & GATT_ENCRYPT_KEY_SIZE_MASK) >> 12)); |
| if (min_key_size != 0) { |
| min_key_size += 6; |
| } |
| GATT_TRACE_DEBUG("%s: p_attr->permission =0x%04x min_key_size==0x%04x", |
| __func__, p_attr->permission, min_key_size); |
| |
| if ((op_code == GATT_CMD_WRITE || op_code == GATT_REQ_WRITE) && |
| (perm & GATT_WRITE_SIGNED_PERM)) { |
| /* use the rules for the mixed security see section 10.2.3*/ |
| /* use security mode 1 level 2 when the following condition follows */ |
| /* LE security mode 2 level 1 and LE security mode 1 level 2 */ |
| if ((perm & GATT_PERM_WRITE_SIGNED) && |
| (perm & GATT_PERM_WRITE_ENCRYPTED)) { |
| perm = GATT_PERM_WRITE_ENCRYPTED; |
| } |
| /* use security mode 1 level 3 when the following condition follows */ |
| /* LE security mode 2 level 2 and security mode 1 and LE */ |
| else if (((perm & GATT_PERM_WRITE_SIGNED_MITM) && |
| (perm & GATT_PERM_WRITE_ENCRYPTED)) || |
| /* LE security mode 2 and security mode 1 level 3 */ |
| ((perm & GATT_WRITE_SIGNED_PERM) && |
| (perm & GATT_PERM_WRITE_ENC_MITM))) { |
| perm = GATT_PERM_WRITE_ENC_MITM; |
| } |
| } |
| |
| if ((op_code == GATT_SIGN_CMD_WRITE) && |
| !(perm & GATT_WRITE_SIGNED_PERM)) { |
| status = GATT_WRITE_NOT_PERMIT; |
| GATT_TRACE_DEBUG("%s: sign cmd write not allowed", __func__); |
| } |
| if ((op_code == GATT_SIGN_CMD_WRITE) && |
| (sec_flag & GATT_SEC_FLAG_ENCRYPTED)) { |
| status = GATT_INVALID_PDU; |
| GATT_TRACE_ERROR("%s: Error!! sign cmd write sent on a encypted link", |
| __func__); |
| } else if (!(perm & GATT_WRITE_ALLOWED)) { |
| status = GATT_WRITE_NOT_PERMIT; |
| GATT_TRACE_ERROR("%s: GATT_WRITE_NOT_PERMIT", __func__); |
| } |
| /* require authentication, but not been authenticated */ |
| else if ((perm & GATT_WRITE_AUTH_REQUIRED) && |
| !(sec_flag & GATT_SEC_FLAG_LKEY_UNAUTHED)) { |
| status = GATT_INSUF_AUTHENTICATION; |
| GATT_TRACE_ERROR("%s: GATT_INSUF_AUTHENTICATION", __func__); |
| } else if ((perm & GATT_WRITE_MITM_REQUIRED) && |
| !(sec_flag & GATT_SEC_FLAG_LKEY_AUTHED)) { |
| status = GATT_INSUF_AUTHENTICATION; |
| GATT_TRACE_ERROR("%s: GATT_INSUF_AUTHENTICATION: MITM required", |
| __func__); |
| } else if ((perm & GATT_WRITE_ENCRYPTED_PERM) && |
| !(sec_flag & GATT_SEC_FLAG_ENCRYPTED)) { |
| status = GATT_INSUF_ENCRYPTION; |
| GATT_TRACE_ERROR("%s: GATT_INSUF_ENCRYPTION", __func__); |
| } else if ((perm & GATT_WRITE_ENCRYPTED_PERM) && |
| (sec_flag & GATT_SEC_FLAG_ENCRYPTED) && |
| (key_size < min_key_size)) { |
| status = GATT_INSUF_KEY_SIZE; |
| GATT_TRACE_ERROR("%s: GATT_INSUF_KEY_SIZE", __func__); |
| } |
| /* LE security mode 2 attribute */ |
| else if (perm & GATT_WRITE_SIGNED_PERM && |
| op_code != GATT_SIGN_CMD_WRITE && |
| !(sec_flag & GATT_SEC_FLAG_ENCRYPTED) && |
| (perm & GATT_WRITE_ALLOWED) == 0) { |
| status = GATT_INSUF_AUTHENTICATION; |
| GATT_TRACE_ERROR( |
| "%s: GATT_INSUF_AUTHENTICATION: LE security mode 2 required", |
| __func__); |
| } else /* writable: must be char value declaration or char descritpors |
| */ |
| { |
| if (p_attr->uuid.len == LEN_UUID_16) { |
| switch (p_attr->uuid.uu.uuid16) { |
| case GATT_UUID_CHAR_PRESENT_FORMAT: /* should be readable only */ |
| case GATT_UUID_CHAR_EXT_PROP: /* should be readable only */ |
| case GATT_UUID_CHAR_AGG_FORMAT: /* should be readable only */ |
| case GATT_UUID_CHAR_VALID_RANGE: |
| status = GATT_WRITE_NOT_PERMIT; |
| break; |
| |
| case GATT_UUID_CHAR_CLIENT_CONFIG: |
| /* fall through */ |
| case GATT_UUID_CHAR_SRVR_CONFIG: |
| max_size = 2; |
| /* fall through */ |
| case GATT_UUID_CHAR_DESCRIPTION: |
| default: /* any other must be character value declaration */ |
| status = GATT_SUCCESS; |
| break; |
| } |
| } else if (p_attr->uuid.len == LEN_UUID_128 || |
| p_attr->uuid.len == LEN_UUID_32) { |
| status = GATT_SUCCESS; |
| } else { |
| status = GATT_INVALID_PDU; |
| } |
| |
| if (p_data == NULL && len > 0) { |
| status = GATT_INVALID_PDU; |
| } |
| /* these attribute does not allow write blob */ |
| else if ((p_attr->uuid.len == LEN_UUID_16) && |
| (p_attr->uuid.uu.uuid16 == GATT_UUID_CHAR_CLIENT_CONFIG || |
| p_attr->uuid.uu.uuid16 == GATT_UUID_CHAR_SRVR_CONFIG)) { |
| if (op_code == GATT_REQ_PREPARE_WRITE && |
| offset != 0) /* does not allow write blob */ |
| { |
| status = GATT_NOT_LONG; |
| GATT_TRACE_ERROR("%s: GATT_NOT_LONG", __func__); |
| } else if (len != |
| max_size) /* data does not match the required format */ |
| { |
| status = GATT_INVALID_ATTR_LEN; |
| GATT_TRACE_ERROR("%s: GATT_INVALID_PDU", __func__); |
| } else { |
| status = GATT_SUCCESS; |
| } |
| } |
| } |
| break; |
| } else |
| p_attr = (tGATT_ATTR*)p_attr->p_next; |
| } |
| } |
| |
| return status; |
| } |
| |
| static void uuid_to_str(const tBT_UUID bt_uuid, char* str_buf, size_t buf_len) { |
| if (bt_uuid.len == LEN_UUID_16) { |
| snprintf(str_buf, buf_len, "0x%04x", bt_uuid.uu.uuid16); |
| } else if (bt_uuid.len == LEN_UUID_32) { |
| snprintf(str_buf, buf_len, "0x%08x", bt_uuid.uu.uuid32); |
| } else if (bt_uuid.len == LEN_UUID_128) { |
| int x = snprintf(str_buf, buf_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-", |
| bt_uuid.uu.uuid128[15], bt_uuid.uu.uuid128[14], |
| bt_uuid.uu.uuid128[13], bt_uuid.uu.uuid128[12], |
| bt_uuid.uu.uuid128[11], bt_uuid.uu.uuid128[10], |
| bt_uuid.uu.uuid128[9], bt_uuid.uu.uuid128[8]); |
| snprintf(&str_buf[x], buf_len - x, "%02x%02x-%02x%02x%02x%02x%02x%02x", |
| bt_uuid.uu.uuid128[7], bt_uuid.uu.uuid128[6], |
| bt_uuid.uu.uuid128[5], bt_uuid.uu.uuid128[4], |
| bt_uuid.uu.uuid128[3], bt_uuid.uu.uuid128[2], |
| bt_uuid.uu.uuid128[1], bt_uuid.uu.uuid128[0]); |
| } else |
| snprintf(str_buf, buf_len, "Unknown (len=%d)", bt_uuid.len); |
| } |
| |
| /******************************************************************************* |
| * |
| * Function allocate_attr_in_db |
| * |
| * Description Allocate a memory space for a new attribute, and link this |
| * attribute into the database attribute list. |
| * |
| * |
| * Parameter p_db : database pointer. |
| * p_uuid: pointer to attribute UUID |
| * service : type of attribute to be added. |
| * |
| * Returns pointer to the newly allocated attribute. |
| * |
| ******************************************************************************/ |
| static void* allocate_attr_in_db(tGATT_SVC_DB* p_db, tBT_UUID* p_uuid, |
| tGATT_PERM perm) { |
| if (p_uuid == NULL) { |
| GATT_TRACE_ERROR("illegal UUID"); |
| return NULL; |
| } |
| |
| if (p_db->end_handle <= p_db->next_handle) { |
| GATT_TRACE_DEBUG("handle space full. handle_max = %d next_handle = %d", |
| p_db->end_handle, p_db->next_handle); |
| return NULL; |
| } |
| |
| uint16_t len = sizeof(tGATT_ATTR); |
| if (p_db->mem_free < len) { |
| if (!allocate_svc_db_buf(p_db)) { |
| GATT_TRACE_ERROR("allocate_attr_in_db failed, no resources"); |
| return NULL; |
| } |
| } |
| memset(p_db->p_free_mem, 0, len); |
| |
| tGATT_ATTR* p_attr = (tGATT_ATTR*)p_db->p_free_mem; |
| p_db->p_free_mem += len; |
| p_db->mem_free -= len; |
| |
| p_attr->handle = p_db->next_handle++; |
| p_attr->uuid = *p_uuid; |
| p_attr->permission = perm; |
| p_attr->p_next = NULL; |
| |
| /* link the attribute record into the end of DB */ |
| if (p_db->p_attr_list == NULL) |
| p_db->p_attr_list = p_attr; |
| else { |
| tGATT_ATTR* p_last = (tGATT_ATTR*)p_db->p_attr_list; |
| |
| while (p_last != NULL && p_last->p_next != NULL) |
| p_last = (tGATT_ATTR*)p_last->p_next; |
| |
| p_last->p_next = p_attr; |
| } |
| |
| char uuid_str[37]; |
| uuid_to_str(p_attr->uuid, uuid_str, sizeof(uuid_str)); |
| GATT_TRACE_ERROR("=====> handle = [0x%04x] uuid = [%s] perm=0x%02x ", |
| p_attr->handle, uuid_str, p_attr->permission); |
| |
| return (void*)p_attr; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function deallocate_attr_in_db |
| * |
| * Description Free an attribute within the database. |
| * |
| * Parameter p_db: database pointer. |
| * p_attr: pointer to the attribute record to be freed. |
| * |
| * Returns bool : success |
| * |
| ******************************************************************************/ |
| static bool deallocate_attr_in_db(tGATT_SVC_DB* p_db, void* p_attr) { |
| tGATT_ATTR *p_cur, *p_next; |
| bool found = false; |
| |
| if (p_db->p_attr_list == NULL) return found; |
| |
| p_cur = (tGATT_ATTR*)p_db->p_attr_list; |
| p_next = (tGATT_ATTR*)p_cur->p_next; |
| |
| for (; p_cur != NULL && p_next != NULL; |
| p_cur = p_next, p_next = (tGATT_ATTR*)p_next->p_next) { |
| if (p_next == p_attr) { |
| p_cur->p_next = p_next->p_next; |
| found = true; |
| } |
| } |
| if (p_cur == p_attr && p_cur == p_db->p_attr_list) { |
| p_db->p_attr_list = p_cur->p_next; |
| found = true; |
| } |
| /* else attr not found */ |
| if (found) p_db->next_handle--; |
| |
| return found; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function copy_extra_byte_in_db |
| * |
| * Description Utility function to allocate extra bytes memory in DB and |
| * copy the value from a source place. |
| * |
| * |
| * Parameter p_db: database pointer. |
| * p_dst: destination data pointer. |
| * p_src: source data pointer. |
| * len: data length to be copied. |
| * |
| * Returns None. |
| * |
| ******************************************************************************/ |
| static bool copy_extra_byte_in_db(tGATT_SVC_DB* p_db, void** p_dst, |
| uint16_t len) { |
| uint8_t* p = (uint8_t*)*p_dst; |
| |
| if (p_db->mem_free < len) { |
| if (!allocate_svc_db_buf(p_db)) { |
| GATT_TRACE_ERROR("copy_extra_byte_in_db failed, no resources"); |
| return false; |
| } |
| } |
| |
| p = p_db->p_free_mem; |
| p_db->p_free_mem += len; |
| p_db->mem_free -= len; |
| memset((void*)p, 0, len); |
| *p_dst = (void*)p; |
| |
| return true; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function allocate_svc_db_buf |
| * |
| * Description Utility function to allocate extra buffer for service |
| * database. |
| * |
| * Returns true if allocation succeed, otherwise false. |
| * |
| ******************************************************************************/ |
| static bool allocate_svc_db_buf(tGATT_SVC_DB* p_db) { |
| BT_HDR* p_buf = (BT_HDR*)osi_calloc(GATT_DB_BUF_SIZE); |
| |
| GATT_TRACE_DEBUG("%s allocating extra buffer", __func__); |
| |
| p_db->p_free_mem = (uint8_t*)p_buf; |
| p_db->mem_free = GATT_DB_BUF_SIZE; |
| |
| fixed_queue_enqueue(p_db->svc_buffer, p_buf); |
| |
| return true; |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatts_send_app_read_request |
| * |
| * Description Send application read request callback |
| * |
| * Returns status of operation. |
| * |
| ******************************************************************************/ |
| static tGATT_STATUS gatts_send_app_read_request( |
| tGATT_TCB* p_tcb, uint8_t op_code, uint16_t handle, uint16_t offset, |
| uint32_t trans_id, bt_gatt_db_attribute_type_t gatt_type) { |
| tGATTS_DATA sr_data; |
| uint8_t i_rcb; |
| tGATT_SR_REG* p_sreg; |
| uint16_t conn_id; |
| |
| i_rcb = gatt_sr_find_i_rcb_by_handle(handle); |
| p_sreg = &gatt_cb.sr_reg[i_rcb]; |
| conn_id = GATT_CREATE_CONN_ID(p_tcb->tcb_idx, p_sreg->gatt_if); |
| |
| if (trans_id == 0) { |
| trans_id = gatt_sr_enqueue_cmd(p_tcb, op_code, handle); |
| gatt_sr_update_cback_cnt(p_tcb, p_sreg->gatt_if, true, true); |
| } |
| |
| if (trans_id != 0) { |
| memset(&sr_data, 0, sizeof(tGATTS_DATA)); |
| |
| sr_data.read_req.handle = handle; |
| sr_data.read_req.is_long = (bool)(op_code == GATT_REQ_READ_BLOB); |
| sr_data.read_req.offset = offset; |
| |
| uint8_t opcode; |
| if (gatt_type == BTGATT_DB_DESCRIPTOR) { |
| opcode = GATTS_REQ_TYPE_READ_DESCRIPTOR; |
| } else if (gatt_type == BTGATT_DB_CHARACTERISTIC) { |
| opcode = GATTS_REQ_TYPE_READ_CHARACTERISTIC; |
| } else { |
| GATT_TRACE_ERROR( |
| "%s: Attempt to read attribute that's not tied with" |
| " characteristic or descriptor value.", |
| __func__); |
| return GATT_ERROR; |
| } |
| |
| gatt_sr_send_req_callback(conn_id, trans_id, opcode, &sr_data); |
| return (tGATT_STATUS)GATT_PENDING; |
| } else |
| return (tGATT_STATUS)GATT_BUSY; /* max pending command, application error */ |
| } |
| |
| /******************************************************************************* |
| * |
| * Function gatts_db_add_service_declaration |
| * |
| * Description Update a service database service declaration record. |
| * |
| * Parameter p_db: database pointer. |
| * service: UUID of the service. |
| * |
| * Returns void |
| * |
| ******************************************************************************/ |
| static bool gatts_db_add_service_declaration(tGATT_SVC_DB* p_db, |
| tBT_UUID* p_service, bool is_pri) { |
| tGATT_ATTR* p_attr; |
| tBT_UUID uuid = {LEN_UUID_16, {0}}; |
| bool rt = false; |
| |
| GATT_TRACE_DEBUG("add_service_declaration"); |
| |
| if (is_pri) |
| uuid.uu.uuid16 = GATT_UUID_PRI_SERVICE; |
| else |
| uuid.uu.uuid16 = GATT_UUID_SEC_SERVICE; |
| |
| /* add service declration record */ |
| p_attr = (tGATT_ATTR*)(allocate_attr_in_db(p_db, &uuid, GATT_PERM_READ)); |
| if (p_attr != NULL) { |
| if (copy_extra_byte_in_db(p_db, (void**)&p_attr->p_value, |
| sizeof(tBT_UUID))) { |
| if (p_service->len == LEN_UUID_16) { |
| p_attr->p_value->uuid.len = LEN_UUID_16; |
| p_attr->p_value->uuid.uu.uuid16 = p_service->uu.uuid16; |
| } else if (p_service->len == LEN_UUID_32) { |
| p_attr->p_value->uuid.len = LEN_UUID_128; |
| gatt_convert_uuid32_to_uuid128(p_attr->p_value->uuid.uu.uuid128, |
| p_service->uu.uuid32); |
| } else { |
| p_attr->p_value->uuid.len = LEN_UUID_128; |
| memcpy(p_attr->p_value->uuid.uu.uuid128, p_service->uu.uuid128, |
| LEN_UUID_128); |
| } |
| rt = true; |
| } |
| } |
| return rt; |
| } |
