1 /* 2 * Copyright (C) 2018 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "nordic_spp_service_server.c" 39 40 /** 41 * Implementation of the Nordic SPP-like profile 42 * 43 * To use with your application, add '#import <nordic_spp_service.gatt' to your .gatt file 44 * and call all functions below. All strings and blobs need to stay valid after calling the functions. 45 */ 46 47 #include <stdint.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 52 #include "btstack_defines.h" 53 #include "ble/att_db.h" 54 #include "ble/att_server.h" 55 #include "btstack_util.h" 56 #include "bluetooth_gatt.h" 57 #include "btstack_debug.h" 58 59 #include "ble/gatt-service/nordic_spp_service_server.h" 60 61 // 62 static const uint8_t nordic_spp_profile_uuid128[] = { 0x6E, 0x40, 0x00, 0x01, 0xB5, 0xA3, 0xF3, 0x93, 0xE0, 0xA9, 0xE5, 0x0E, 0x24, 0xDC, 0xCA, 0x9E }; 63 static const uint8_t nordic_spp_rx_uuid128[] = { 0x6E, 0x40, 0x00, 0x02, 0xB5, 0xA3, 0xF3, 0x93, 0xE0, 0xA9, 0xE5, 0x0E, 0x24, 0xDC, 0xCA, 0x9E }; 64 static const uint8_t nordic_spp_tx_uuid128[] = { 0x6E, 0x40, 0x00, 0x03, 0xB5, 0xA3, 0xF3, 0x93, 0xE0, 0xA9, 0xE5, 0x0E, 0x24, 0xDC, 0xCA, 0x9E }; 65 66 static att_service_handler_t nordic_spp_service; 67 static void (*client_callback)(hci_con_handle_t con_handle, const uint8_t * data, uint16_t size); 68 69 static uint16_t nordic_spp_rx_value_handle; 70 static uint16_t nordic_spp_tx_value_handle; 71 static uint16_t nordic_spp_tx_client_configuration_handle; 72 static uint16_t nordic_spp_tx_client_configuration_value; 73 74 static uint16_t nordic_spp_service_read_callback(hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint8_t * buffer, uint16_t buffer_size){ 75 UNUSED(con_handle); 76 UNUSED(offset); 77 UNUSED(buffer_size); 78 79 if (attribute_handle == nordic_spp_tx_client_configuration_handle){ 80 if (buffer){ 81 little_endian_store_16(buffer, 0, nordic_spp_tx_client_configuration_value); 82 } 83 return 2; 84 } 85 return 0; 86 } 87 88 static int nordic_spp_service_write_callback(hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t transaction_mode, uint16_t offset, uint8_t *buffer, uint16_t buffer_size){ 89 UNUSED(transaction_mode); 90 UNUSED(offset); 91 UNUSED(buffer_size); 92 93 if (attribute_handle == nordic_spp_rx_value_handle){ 94 client_callback(con_handle, &buffer[0], buffer_size); 95 } 96 if (attribute_handle == nordic_spp_tx_client_configuration_handle){ 97 nordic_spp_tx_client_configuration_value = little_endian_read_16(buffer, 0); 98 if (nordic_spp_tx_client_configuration_value){ 99 client_callback(con_handle, NULL, 0); 100 } 101 } 102 103 return 0; 104 } 105 106 /** 107 * @brief Init Nordic SPP Service Server with ATT DB 108 * @param callback for tx data from peer 109 */ 110 void nordic_spp_service_server_init(void (*callback)(hci_con_handle_t con_handle, const uint8_t * data, uint16_t size)){ 111 client_callback = callback; 112 113 // get service handle range 114 uint16_t start_handle = 0; 115 uint16_t end_handle = 0xffff; 116 int service_found = gatt_server_get_get_handle_range_for_service_with_uuid128(nordic_spp_profile_uuid128, &start_handle, &end_handle); 117 if (!service_found) return; 118 119 // get characteristic value handle and client configuration handle 120 nordic_spp_rx_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid128(start_handle, end_handle, nordic_spp_rx_uuid128); 121 nordic_spp_tx_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid128(start_handle, end_handle, nordic_spp_tx_uuid128); 122 nordic_spp_tx_client_configuration_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid128(start_handle, end_handle, nordic_spp_tx_uuid128); 123 124 log_info("nordic_spp_rx_value_handle 0x%02x", nordic_spp_rx_value_handle); 125 log_info("nordic_spp_tx_value_handle 0x%02x", nordic_spp_tx_value_handle); 126 log_info("nordic_spp_tx_client_configuration_handle 0x%02x", nordic_spp_tx_client_configuration_handle); 127 128 // register service with ATT Server 129 nordic_spp_service.start_handle = start_handle; 130 nordic_spp_service.end_handle = end_handle; 131 nordic_spp_service.read_callback = &nordic_spp_service_read_callback; 132 nordic_spp_service.write_callback = &nordic_spp_service_write_callback; 133 att_server_register_service_handler(&nordic_spp_service); 134 } 135 136 /** 137 * @brief Queue send request. When called, one packet can be send via nordic_spp_service_send below 138 * @param request 139 * @param con_handle 140 */ 141 void nordic_spp_service_server_request_can_send_now(btstack_context_callback_registration_t * request, hci_con_handle_t con_handle){ 142 att_server_request_to_send_notification(request, con_handle); 143 } 144 145 /** 146 * @brief Send data 147 * @param con_handle 148 * @param data 149 * @param size 150 */ 151 int nordic_spp_service_server_send(hci_con_handle_t con_handle, const uint8_t * data, uint16_t size){ 152 return att_server_notify(con_handle, nordic_spp_tx_value_handle, data, size); 153 } 154 155