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 "btstack_defines.h" 48 #include "ble/att_db.h" 49 #include "ble/att_server.h" 50 #include "btstack_util.h" 51 #include "bluetooth_gatt.h" 52 53 #include "ble/gatt-service/nordic_spp_service_server.h" 54 55 // 56 static const uint8_t nordic_spp_profile_uuid128[] = { 0x6E, 0x40, 0x00, 0x01, 0xB5, 0xA3, 0xF3, 0x93, 0xE0, 0xA9, 0xE5, 0x0E, 0x24, 0xDC, 0xCA, 0x9E }; 57 static const uint8_t nordic_spp_rx_uuid128[] = { 0x6E, 0x40, 0x00, 0x02, 0xB5, 0xA3, 0xF3, 0x93, 0xE0, 0xA9, 0xE5, 0x0E, 0x24, 0xDC, 0xCA, 0x9E }; 58 static const uint8_t nordic_spp_tx_uuid128[] = { 0x6E, 0x40, 0x00, 0x03, 0xB5, 0xA3, 0xF3, 0x93, 0xE0, 0xA9, 0xE5, 0x0E, 0x24, 0xDC, 0xCA, 0x9E }; 59 60 static att_service_handler_t nordic_spp_service; 61 static void (*client_callback)(hci_con_handle_t con_handle, const uint8_t * data, uint16_t size); 62 63 static uint16_t nordic_spp_tx_value_handle; 64 static uint16_t nordic_spp_rx_value_handle; 65 static uint16_t nordic_spp_rx_client_configuration_handle; 66 static uint16_t nordic_spp_rx_client_configuration_value; 67 68 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){ 69 UNUSED(con_handle); 70 UNUSED(offset); 71 UNUSED(buffer_size); 72 if (attribute_handle == nordic_spp_rx_client_configuration_handle){ 73 if (buffer){ 74 little_endian_store_16(buffer, 0, nordic_spp_rx_client_configuration_value); 75 } 76 return 2; 77 } 78 return 0; 79 } 80 81 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){ 82 UNUSED(transaction_mode); 83 UNUSED(offset); 84 UNUSED(buffer_size); 85 86 if (attribute_handle == nordic_spp_tx_value_handle){ 87 client_callback(con_handle, &buffer[0], buffer_size); 88 } 89 if (attribute_handle == nordic_spp_rx_client_configuration_handle){ 90 nordic_spp_rx_client_configuration_value = little_endian_read_16(buffer, 0); 91 if (nordic_spp_rx_client_configuration_value){ 92 client_callback(con_handle, NULL, 0); 93 } 94 } 95 return 0; 96 } 97 98 /** 99 * @brief Init Nordic SPP Service Server with ATT DB 100 * @param callback for tx data from peer 101 */ 102 void nordic_spp_service_server_init(void (*callback)(hci_con_handle_t con_handle, const uint8_t * data, uint16_t size)){ 103 client_callback = callback; 104 105 // get service handle range 106 uint16_t start_handle = 0; 107 uint16_t end_handle = 0xfff; 108 int service_found = gatt_server_get_get_handle_range_for_service_with_uuid128(nordic_spp_profile_uuid128, &start_handle, &end_handle); 109 if (!service_found) return; 110 111 // get characteristic value handle and client configuration handle 112 nordic_spp_tx_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid128(start_handle, end_handle, nordic_spp_tx_uuid128); 113 nordic_spp_rx_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid128(start_handle, end_handle, nordic_spp_rx_uuid128); 114 nordic_spp_rx_client_configuration_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid128(start_handle, end_handle, nordic_spp_rx_uuid128); 115 116 // register service with ATT Server 117 nordic_spp_service.start_handle = start_handle; 118 nordic_spp_service.end_handle = end_handle; 119 nordic_spp_service.read_callback = &nordic_spp_service_read_callback; 120 nordic_spp_service.write_callback = &nordic_spp_service_write_callback; 121 att_server_register_service_handler(&nordic_spp_service); 122 } 123 124 /** 125 * @brief Queue send request. When called, one packet can be send via nordic_spp_service_send below 126 * @param request 127 * @param con_handle 128 */ 129 void nordic_spp_service_server_request_can_send_now(btstack_context_callback_registration_t * request, hci_con_handle_t con_handle){ 130 att_server_request_to_send_notification(request, con_handle); 131 } 132 133 /** 134 * @brief Send data 135 * @param con_handle 136 * @param data 137 * @param size 138 */ 139 int nordic_spp_service_server_send(hci_con_handle_t con_handle, const uint8_t * data, uint16_t size){ 140 return att_server_notify(con_handle, nordic_spp_rx_value_handle, &data[0], size); 141 } 142 143