| /****************************************************************************** |
| * |
| * Copyright (C) 2009-2013 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. |
| * |
| ******************************************************************************/ |
| |
| |
| #include <hardware/bluetooth.h> |
| #include <hardware/bt_gatt.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <string.h> |
| |
| #define LOG_TAG "BtGatt.btif" |
| |
| #include "bta_api.h" |
| #include "bta_gatt_api.h" |
| #include "bd.h" |
| #include "btif_storage.h" |
| |
| #include "btif_common.h" |
| #include "btif_dm.h" |
| #include "btif_util.h" |
| #include "btif_gatt.h" |
| #include "btif_gatt_util.h" |
| |
| #define GATTC_READ_VALUE_TYPE_VALUE 0x0000 /* Attribute value itself */ |
| #define GATTC_READ_VALUE_TYPE_AGG_FORMAT 0x2905 /* Characteristic Aggregate Format*/ |
| |
| #define BTIF_GATT_MAX_ENC_LINK_RECORDS 10 |
| |
| typedef struct |
| { |
| BD_ADDR bd_addr; |
| BOOLEAN in_use; |
| }__attribute__((packed)) btif_gatt_encrypted_link_t; |
| |
| static char BASE_UUID[16] = { |
| 0xfb, 0x34, 0x9b, 0x5f, 0x80, 0x00, 0x00, 0x80, |
| 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
| }; |
| |
| static btif_gatt_encrypted_link_t encrypted_links[BTIF_GATT_MAX_ENC_LINK_RECORDS]; |
| |
| int uuidType(unsigned char* p_uuid) |
| { |
| int i = 0; |
| int match = 0; |
| int all_zero = 1; |
| |
| for(i = 0; i != 16; ++i) |
| { |
| if (i == 12 || i == 13) |
| continue; |
| |
| if (p_uuid[i] == BASE_UUID[i]) |
| ++match; |
| |
| if (p_uuid[i] != 0) |
| all_zero = 0; |
| } |
| if (all_zero) |
| return 0; |
| if (match == 12) |
| return LEN_UUID_32; |
| if (match == 14) |
| return LEN_UUID_16; |
| return LEN_UUID_128; |
| } |
| |
| /******************************************************************************* |
| * BTIF -> BTA conversion functions |
| *******************************************************************************/ |
| |
| void btif_to_bta_uuid(tBT_UUID *p_dest, bt_uuid_t *p_src) |
| { |
| char *p_byte = (char*)p_src; |
| int i = 0; |
| |
| p_dest->len = uuidType(p_src->uu); |
| |
| switch (p_dest->len) |
| { |
| case LEN_UUID_16: |
| p_dest->uu.uuid16 = (p_src->uu[13] << 8) + p_src->uu[12]; |
| break; |
| |
| case LEN_UUID_32: |
| p_dest->uu.uuid32 = (p_src->uu[13] << 8) + p_src->uu[12]; |
| p_dest->uu.uuid32 += (p_src->uu[15] << 24) + (p_src->uu[14] << 16); |
| break; |
| |
| case LEN_UUID_128: |
| for(i = 0; i != 16; ++i) |
| p_dest->uu.uuid128[i] = p_byte[i]; |
| break; |
| |
| default: |
| ALOGE("%s: Unknown UUID length %d!", __FUNCTION__, p_dest->len); |
| break; |
| } |
| } |
| |
| void btif_to_bta_char_id(tBTA_GATT_ID *p_dest, btgatt_char_id_t *p_src) |
| { |
| p_dest->inst_id = p_src->inst_id; |
| btif_to_bta_uuid(&p_dest->uuid, &p_src->uuid); |
| } |
| |
| void btif_to_bta_srvc_id(tBTA_GATT_SRVC_ID *p_dest, btgatt_srvc_id_t *p_src) |
| { |
| p_dest->id.inst_id = p_src->id.inst_id; |
| btif_to_bta_uuid(&p_dest->id.uuid, &p_src->id.uuid); |
| p_dest->is_primary = p_src->is_primary; |
| } |
| |
| void btif_to_bta_response(tBTA_GATTS_RSP *p_dest, btgatt_response_t* p_src) |
| { |
| p_dest->attr_value.auth_req = p_src->attr_value.auth_req; |
| p_dest->attr_value.handle = p_src->attr_value.handle; |
| p_dest->attr_value.len = p_src->attr_value.len; |
| p_dest->attr_value.offset = p_src->attr_value.offset; |
| memcpy(p_dest->attr_value.value, p_src->attr_value.value, GATT_MAX_ATTR_LEN); |
| } |
| |
| /******************************************************************************* |
| * BTA -> BTIF conversion functions |
| *******************************************************************************/ |
| |
| void bta_to_btif_uuid(bt_uuid_t *p_dest, tBT_UUID *p_src) |
| { |
| int i = 0; |
| |
| if (p_src->len == LEN_UUID_16 || p_src->len == LEN_UUID_32) |
| { |
| for(i=0; i != 16; ++i) |
| p_dest->uu[i] = BASE_UUID[i]; |
| } |
| |
| switch (p_src->len) |
| { |
| case 0: |
| break; |
| |
| case LEN_UUID_16: |
| p_dest->uu[12] = p_src->uu.uuid16 & 0xff; |
| p_dest->uu[13] = (p_src->uu.uuid16 >> 8) & 0xff; |
| break; |
| |
| case LEN_UUID_32: |
| p_dest->uu[12] = p_src->uu.uuid16 & 0xff; |
| p_dest->uu[13] = (p_src->uu.uuid16 >> 8) & 0xff; |
| p_dest->uu[14] = (p_src->uu.uuid32 >> 16) & 0xff; |
| p_dest->uu[15] = (p_src->uu.uuid32 >> 24) & 0xff; |
| break; |
| |
| case LEN_UUID_128: |
| for(i=0; i != 16; ++i) |
| p_dest->uu[i] = p_src->uu.uuid128[i]; |
| break; |
| |
| default: |
| ALOGE("%s: Unknown UUID length %d!", __FUNCTION__, p_src->len); |
| break; |
| } |
| } |
| |
| |
| void bta_to_btif_char_id(btgatt_char_id_t *p_dest, tBTA_GATT_ID *p_src) |
| { |
| p_dest->inst_id = p_src->inst_id; |
| bta_to_btif_uuid(&p_dest->uuid, &p_src->uuid); |
| } |
| |
| void bta_to_btif_srvc_id(btgatt_srvc_id_t *p_dest, tBTA_GATT_SRVC_ID *p_src) |
| { |
| p_dest->id.inst_id = p_src->id.inst_id; |
| bta_to_btif_uuid(&p_dest->id.uuid, &p_src->id.uuid); |
| p_dest->is_primary = p_src->is_primary; |
| } |
| |
| |
| /******************************************************************************* |
| * Utility functions |
| *******************************************************************************/ |
| |
| uint16_t get_uuid16(tBT_UUID *p_uuid) |
| { |
| if (p_uuid->len == LEN_UUID_16) |
| { |
| return p_uuid->uu.uuid16; |
| } |
| else if (p_uuid->len == LEN_UUID_128) |
| { |
| UINT16 u16; |
| UINT8 *p = &p_uuid->uu.uuid128[LEN_UUID_128 - 4]; |
| STREAM_TO_UINT16(u16, p); |
| return u16; |
| } |
| else /* p_uuid->len == LEN_UUID_32 */ |
| { |
| return(UINT16) p_uuid->uu.uuid32; |
| } |
| } |
| |
| uint16_t set_read_value(btgatt_read_params_t *p_dest, tBTA_GATTC_READ *p_src) |
| { |
| int i = 0; |
| uint16_t descr_type = 0; |
| uint16_t len = 0; |
| |
| p_dest->status = p_src->status; |
| bta_to_btif_srvc_id(&p_dest->srvc_id, &p_src->srvc_id); |
| bta_to_btif_char_id(&p_dest->char_id, &p_src->char_id); |
| bta_to_btif_uuid(&p_dest->descr_id, &p_src->descr_type); |
| |
| descr_type = get_uuid16(&p_src->descr_type); |
| |
| switch (descr_type) |
| { |
| case GATT_UUID_CHAR_AGG_FORMAT: |
| /* not supported */ |
| p_dest->value_type = GATTC_READ_VALUE_TYPE_AGG_FORMAT; |
| break; |
| |
| default: |
| if ( p_src->status == BTA_GATT_OK ) |
| { |
| ALOGI("%s unformat.len = %d ", __FUNCTION__, p_src->p_value->unformat.len); |
| p_dest->value.len = p_src->p_value->unformat.len; |
| if ( p_src->p_value->unformat.len > 0 && p_src->p_value->unformat.p_value != NULL ) |
| { |
| memcpy(p_dest->value.value, p_src->p_value->unformat.p_value, |
| p_src->p_value->unformat.len); |
| } |
| len += p_src->p_value->unformat.len; |
| } |
| else |
| { |
| p_dest->value.len = 0; |
| } |
| |
| p_dest->value_type = GATTC_READ_VALUE_TYPE_VALUE; |
| break; |
| } |
| |
| return len; |
| } |
| |
| /******************************************************************************* |
| * Encrypted link map handling |
| *******************************************************************************/ |
| |
| static void btif_gatt_set_encryption_cb (BD_ADDR bd_addr, tBTA_STATUS result); |
| |
| static BOOLEAN btif_gatt_is_link_encrypted (BD_ADDR bd_addr) |
| { |
| btif_gatt_encrypted_link_t *p_link = &encrypted_links[0]; |
| int i; |
| |
| if (bd_addr == NULL) |
| return FALSE; |
| |
| for (i = 0; i != BTIF_GATT_MAX_ENC_LINK_RECORDS; ++i, ++p_link) |
| { |
| if (p_link->in_use && (!memcmp(p_link->bd_addr, bd_addr, BD_ADDR_LEN))) |
| return TRUE; |
| } |
| return FALSE; |
| } |
| |
| static BOOLEAN btif_gatt_add_encrypted_link (BD_ADDR bd_addr) |
| { |
| btif_gatt_encrypted_link_t *p_link = &encrypted_links[0]; |
| int i; |
| |
| if (bd_addr == NULL) |
| return FALSE; |
| |
| if (btif_gatt_is_link_encrypted(bd_addr)) |
| return TRUE; |
| |
| for (i = 0; i != BTIF_GATT_MAX_ENC_LINK_RECORDS; ++i, ++p_link) |
| { |
| if (!p_link->in_use) |
| { |
| p_link->in_use = TRUE; |
| memcpy( p_link->bd_addr, bd_addr, sizeof(BD_ADDR) ); |
| return TRUE; |
| } |
| } |
| |
| return FALSE; |
| } |
| |
| void btif_gatt_remove_encrypted_link (BD_ADDR bd_addr) |
| { |
| btif_gatt_encrypted_link_t *p_link = &encrypted_links[0]; |
| int i; |
| |
| if (bd_addr == NULL) |
| return; |
| |
| for (i = 0; i != BTIF_GATT_MAX_ENC_LINK_RECORDS; ++i, ++p_link) |
| { |
| if (p_link->in_use && (!memcmp (p_link->bd_addr, bd_addr, BD_ADDR_LEN))) |
| { |
| p_link->in_use = FALSE; |
| break; |
| } |
| } |
| } |
| |
| static void btif_gatt_set_encryption_cb (BD_ADDR bd_addr, tBTA_STATUS result) |
| { |
| if (result == BTA_SUCCESS) |
| { |
| btif_gatt_add_encrypted_link(bd_addr); |
| } else { |
| btif_gatt_remove_encrypted_link(bd_addr); |
| } |
| } |
| |
| void btif_gatt_check_encrypted_link (BD_ADDR bd_addr) |
| { |
| char buf[100]; |
| |
| bt_bdaddr_t bda; |
| bdcpy(bda.address, bd_addr); |
| |
| if ((btif_storage_get_ble_bonding_key(&bda, BTIF_DM_LE_KEY_PENC, |
| buf, sizeof(btif_dm_ble_penc_keys_t)) == BT_STATUS_SUCCESS) |
| && !btif_gatt_is_link_encrypted(bd_addr)) |
| { |
| BTA_DmSetEncryption(bd_addr, |
| &btif_gatt_set_encryption_cb, BTM_BLE_SEC_ENCRYPT); |
| } |
| } |
