/** * Copyright (c) 2016 - 2017, Nordic Semiconductor ASA * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #include "sdk_common.h" #if NRF_MODULE_ENABLED(NFC_NDEF_RECORD_PARSER) #include #include #include "nfc_ndef_record_parser.h" #include "app_util.h" #include "nordic_common.h" #include "nrf_delay.h" #define NRF_LOG_MODULE_NAME "NFC_NDEF_PARSER" #if NFC_NDEF_RECORD_PARSER_LOG_ENABLED #define NRF_LOG_LEVEL NFC_NDEF_RECORD_PARSER_LOG_LEVEL #define NRF_LOG_INFO_COLOR NFC_NDEF_RECORD_PARSER_INFO_COLOR #else // NFC_NDEF_RECORD_PARSER_LOG_ENABLED #define NRF_LOG_LEVEL 0 #endif // NFC_NDEF_RECORD_PARSER_LOG_ENABLED #include "nrf_log.h" /* Sum of sizes of fields: TNF-flags, Type Length, Payload Length in short NDEF record. */ #define NDEF_RECORD_BASE_LONG_SHORT (2 + NDEF_RECORD_PAYLOAD_LEN_SHORT_SIZE) ret_code_t ndef_record_parser(nfc_ndef_bin_payload_desc_t * p_bin_pay_desc, nfc_ndef_record_desc_t * p_rec_desc, nfc_ndef_record_location_t * p_record_location, uint8_t const * p_nfc_data, uint32_t * p_nfc_data_len) { uint32_t expected_rec_size = NDEF_RECORD_BASE_LONG_SHORT; if (expected_rec_size > *p_nfc_data_len) { return NRF_ERROR_INVALID_LENGTH; } p_rec_desc->tnf = (nfc_ndef_record_tnf_t) ((*p_nfc_data) & NDEF_RECORD_TNF_MASK); /* An NDEF parser that receives an NDEF record with an unknown or unsupported TNF field value SHOULD treat it as Unknown. See NFCForum-TS-NDEF_1.0 */ if (p_rec_desc->tnf == TNF_RESERVED) { p_rec_desc->tnf = TNF_UNKNOWN_TYPE; } *p_record_location = (nfc_ndef_record_location_t) ((*p_nfc_data) & NDEF_RECORD_LOCATION_MASK); uint8_t flags = *(p_nfc_data++); p_rec_desc->type_length = *(p_nfc_data++); uint32_t payload_lenght; if (flags & NDEF_RECORD_SR_MASK) { payload_lenght = *(p_nfc_data++); } else { expected_rec_size += NDEF_RECORD_PAYLOAD_LEN_LONG_SIZE - NDEF_RECORD_PAYLOAD_LEN_SHORT_SIZE; if (expected_rec_size > *p_nfc_data_len) { return NRF_ERROR_INVALID_LENGTH; } payload_lenght = uint32_big_decode(p_nfc_data); p_nfc_data += NDEF_RECORD_PAYLOAD_LEN_LONG_SIZE; } if (flags & NDEF_RECORD_IL_MASK) { expected_rec_size += NDEF_RECORD_ID_LEN_SIZE; if (expected_rec_size > *p_nfc_data_len) { return NRF_ERROR_INVALID_LENGTH; } p_rec_desc->id_length = *(p_nfc_data++); } else { p_rec_desc->id_length = 0; p_rec_desc->p_id = NULL; } expected_rec_size += p_rec_desc->type_length + p_rec_desc->id_length + payload_lenght; if (expected_rec_size > *p_nfc_data_len) { return NRF_ERROR_INVALID_LENGTH; } if (p_rec_desc->type_length > 0) { p_rec_desc->p_type = p_nfc_data; p_nfc_data += p_rec_desc->type_length; } else { p_rec_desc->p_type = NULL; } if (p_rec_desc->id_length > 0) { p_rec_desc->p_id = p_nfc_data; p_nfc_data += p_rec_desc->id_length; } if (payload_lenght == 0) { p_bin_pay_desc->p_payload = NULL; } else { p_bin_pay_desc->p_payload = p_nfc_data; } p_bin_pay_desc->payload_length = payload_lenght; p_rec_desc->p_payload_descriptor = p_bin_pay_desc; p_rec_desc->payload_constructor = (p_payload_constructor_t) nfc_ndef_bin_payload_memcopy; *p_nfc_data_len = expected_rec_size; return NRF_SUCCESS; } char const * const tnf_strings[] = { "Empty\r\n", "NFC Forum well-known type\r\n", "Media-type (RFC 2046)\r\n", "Absolute URI (RFC 3986)\r\n", "NFC Forum external type (NFC RTD)\r\n", "Unknown\r\n", "Unchanged\r\n", "Reserved\r\n" }; void ndef_record_printout(uint32_t num, nfc_ndef_record_desc_t * const p_rec_desc) { NRF_LOG_INFO("NDEF record %d content:\r\n", num); NRF_LOG_INFO("TNF: %s",(uint32_t)tnf_strings[p_rec_desc->tnf]); if (p_rec_desc->p_id != NULL) { NRF_LOG_INFO("ID:\r\n"); NRF_LOG_HEXDUMP_INFO((uint8_t *)p_rec_desc->p_id, p_rec_desc->id_length); } if (p_rec_desc->p_type != NULL) { NRF_LOG_INFO("type:\r\n"); NRF_LOG_HEXDUMP_INFO((uint8_t *)p_rec_desc->p_type, p_rec_desc->type_length); } if (p_rec_desc->payload_constructor == (p_payload_constructor_t) nfc_ndef_bin_payload_memcopy) { nfc_ndef_bin_payload_desc_t * p_bin_pay_desc = p_rec_desc->p_payload_descriptor; if (p_bin_pay_desc->p_payload != NULL) { NRF_LOG_INFO("Payload data (%d bytes):\r\n", p_bin_pay_desc->payload_length); NRF_LOG_HEXDUMP_INFO((uint8_t *)p_bin_pay_desc->p_payload, p_bin_pay_desc->payload_length); } else { NRF_LOG_INFO("No payload\r\n"); } } NRF_LOG_INFO("\r\n\r\n"); } #endif // NRF_MODULE_ENABLED(NFC_NDEF_RECORD_PARSER)