Diego Ostuni
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lib_NDEF_Handover.cpp@0:de13951f30f6, 2019-11-14 (annotated)
- Committer:
- DiegoOstuni
- Date:
- Thu Nov 14 10:34:11 2019 +0000
- Revision:
- 0:de13951f30f6
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| User | Revision | Line number | New contents of line |
|---|---|---|---|
| DiegoOstuni | 0:de13951f30f6 | 1 | /** |
| DiegoOstuni | 0:de13951f30f6 | 2 | ****************************************************************************** |
| DiegoOstuni | 0:de13951f30f6 | 3 | * @file lib_NDEF_Bluetooth.c |
| DiegoOstuni | 0:de13951f30f6 | 4 | * @author MMY Application Team |
| DiegoOstuni | 0:de13951f30f6 | 5 | * @version $Revision: 2702 $ |
| DiegoOstuni | 0:de13951f30f6 | 6 | * @date $Date: 2016-07-13 18:45:05 +0200 (Wed, 13 Jul 2016) $ |
| DiegoOstuni | 0:de13951f30f6 | 7 | * @brief This file helps to manage a NDEF Handover message. |
| DiegoOstuni | 0:de13951f30f6 | 8 | * @ingroup libNDEF_Handover |
| DiegoOstuni | 0:de13951f30f6 | 9 | ****************************************************************************** |
| DiegoOstuni | 0:de13951f30f6 | 10 | * @attention |
| DiegoOstuni | 0:de13951f30f6 | 11 | * |
| DiegoOstuni | 0:de13951f30f6 | 12 | * <h2><center>© COPYRIGHT 2016 STMicroelectronics</center></h2> |
| DiegoOstuni | 0:de13951f30f6 | 13 | * |
| DiegoOstuni | 0:de13951f30f6 | 14 | * Licensed under ST MYLIBERTY SOFTWARE LICENSE AGREEMENT (the "License"); |
| DiegoOstuni | 0:de13951f30f6 | 15 | * You may not use this file except in compliance with the License. |
| DiegoOstuni | 0:de13951f30f6 | 16 | * You may obtain a copy of the License at: |
| DiegoOstuni | 0:de13951f30f6 | 17 | * |
| DiegoOstuni | 0:de13951f30f6 | 18 | * http://www.st.com/myliberty |
| DiegoOstuni | 0:de13951f30f6 | 19 | * |
| DiegoOstuni | 0:de13951f30f6 | 20 | * Unless required by applicable law or agreed to in writing, software |
| DiegoOstuni | 0:de13951f30f6 | 21 | * distributed under the License is distributed on an "AS IS" BASIS, |
| DiegoOstuni | 0:de13951f30f6 | 22 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, |
| DiegoOstuni | 0:de13951f30f6 | 23 | * AND SPECIFICALLY DISCLAIMING THE IMPLIED WARRANTIES OF MERCHANTABILITY, |
| DiegoOstuni | 0:de13951f30f6 | 24 | * FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. |
| DiegoOstuni | 0:de13951f30f6 | 25 | * See the License for the specific language governing permissions and |
| DiegoOstuni | 0:de13951f30f6 | 26 | * limitations under the License. |
| DiegoOstuni | 0:de13951f30f6 | 27 | * |
| DiegoOstuni | 0:de13951f30f6 | 28 | ****************************************************************************** |
| DiegoOstuni | 0:de13951f30f6 | 29 | */ |
| DiegoOstuni | 0:de13951f30f6 | 30 | /* Includes ------------------------------------------------------------------*/ |
| DiegoOstuni | 0:de13951f30f6 | 31 | #include "lib_NDEF_Handover.h" |
| DiegoOstuni | 0:de13951f30f6 | 32 | |
| DiegoOstuni | 0:de13951f30f6 | 33 | /** @addtogroup lib_NDEF_Handover NDEF Handover library |
| DiegoOstuni | 0:de13951f30f6 | 34 | * @ingroup libNDEF |
| DiegoOstuni | 0:de13951f30f6 | 35 | * @brief This module is used to manage the NDEF Handover messages, to negociate the switch to a non-nfc protocol of communication. |
| DiegoOstuni | 0:de13951f30f6 | 36 | * @details |
| DiegoOstuni | 0:de13951f30f6 | 37 | * The NDEF Handover process is described by the NFC Forum Connection Handover specification. |
| DiegoOstuni | 0:de13951f30f6 | 38 | * It consists in a specific NDEF message construct, as: |
| DiegoOstuni | 0:de13951f30f6 | 39 | * - NDEF 1st record: Handover Request or Handover Select record |
| DiegoOstuni | 0:de13951f30f6 | 40 | * - Version |
| DiegoOstuni | 0:de13951f30f6 | 41 | * - Collision Resolution (nested record, optional) |
| DiegoOstuni | 0:de13951f30f6 | 42 | * - Random number |
| DiegoOstuni | 0:de13951f30f6 | 43 | * - Alternative Carrier 1 (nested record) |
| DiegoOstuni | 0:de13951f30f6 | 44 | * - Power state |
| DiegoOstuni | 0:de13951f30f6 | 45 | * - Reference Data |
| DiegoOstuni | 0:de13951f30f6 | 46 | * - Auxiliary Data Reference 1 |
| DiegoOstuni | 0:de13951f30f6 | 47 | * - ... |
| DiegoOstuni | 0:de13951f30f6 | 48 | * - Auxiliary Data Reference N |
| DiegoOstuni | 0:de13951f30f6 | 49 | * - ... |
| DiegoOstuni | 0:de13951f30f6 | 50 | * - Alternative Carrier N (nested record) |
| DiegoOstuni | 0:de13951f30f6 | 51 | * - NDEF record 2+: Alternative Carrier or Auxiliary Data: Connection details for one of the AC (record ID is the AC Reference Data or an Auxiliary Data Reference). |
| DiegoOstuni | 0:de13951f30f6 | 52 | * - ... |
| DiegoOstuni | 0:de13951f30f6 | 53 | * - NDEF record N: Alternative Carrier or Auxiliary Data: Connection details for one of the AC (record ID is the AC Reference Data or an Auxiliary Data Reference). |
| DiegoOstuni | 0:de13951f30f6 | 54 | * _________________ |
| DiegoOstuni | 0:de13951f30f6 | 55 | * @section Handover_Library_Usage NDEF Handover Library usage: |
| DiegoOstuni | 0:de13951f30f6 | 56 | * @subsection Static_Handover Static Handover |
| DiegoOstuni | 0:de13951f30f6 | 57 | * The Static Handover is used when a device is only equipped with a NFC Tag (no peer-to-peer) to directly propose a set of Alternative Carriers (ACs: bluetooth, wifi,...) |
| DiegoOstuni | 0:de13951f30f6 | 58 | * without running the full handover request-select process.\n |
| DiegoOstuni | 0:de13951f30f6 | 59 | * The Handover Select record use in that case is similar to the one used during a regular Handover negociation.\n |
| DiegoOstuni | 0:de13951f30f6 | 60 | * 1. Declare & initialize an instance of `Ndef_Handover_t`, such as: |
| DiegoOstuni | 0:de13951f30f6 | 61 | * |
| DiegoOstuni | 0:de13951f30f6 | 62 | * Ndef_Handover_t wHandover = {.type = NDEF_HANDOVER_SELECT_TYPE, .version = NDEF_HANDOVER_VERSION_1_2}; |
| DiegoOstuni | 0:de13951f30f6 | 63 | * 2. Declare a `sRecordInfo_t` instance: |
| DiegoOstuni | 0:de13951f30f6 | 64 | * |
| DiegoOstuni | 0:de13951f30f6 | 65 | * sRecordInfo_t HandoverRecord; |
| DiegoOstuni | 0:de13951f30f6 | 66 | * 3. Call the `NDEF_CreateHandover` function, to start preparing the Handover Select record |
| DiegoOstuni | 0:de13951f30f6 | 67 | * |
| DiegoOstuni | 0:de13951f30f6 | 68 | * NDEF_CreateHandover(&wHandover,&HandoverRecord); |
| DiegoOstuni | 0:de13951f30f6 | 69 | * 4. Call the `NDEF_AddAlternativeCarrier` for each Alternative Carrier (such as Bluetooth, Wifi, ...) |
| DiegoOstuni | 0:de13951f30f6 | 70 | * 5. Declare and initialize as many `Ndef_Handover_alternative_carrier_t` instances as the number of non-NFC protocol available. |
| DiegoOstuni | 0:de13951f30f6 | 71 | * And then call the `NDEF_AddAlternativeCarrier` for each of them. |
| DiegoOstuni | 0:de13951f30f6 | 72 | * |
| DiegoOstuni | 0:de13951f30f6 | 73 | * Ndef_Handover_alternative_carrier_t wAC_BREDR = {.cps = NDEF_HANDOVER_AC_CPS_ACTIVE, |
| DiegoOstuni | 0:de13951f30f6 | 74 | * .aux_data_ref_count = 0}; |
| DiegoOstuni | 0:de13951f30f6 | 75 | * Ndef_Handover_alternative_carrier_t wAC_BLE = {.cps = NDEF_HANDOVER_AC_CPS_ACTIVE, |
| DiegoOstuni | 0:de13951f30f6 | 76 | * .aux_data_ref_count = 0}; |
| DiegoOstuni | 0:de13951f30f6 | 77 | * Ndef_Handover_alternative_carrier_t wAC_Wifi = {.cps = NDEF_HANDOVER_AC_CPS_ACTIVE, |
| DiegoOstuni | 0:de13951f30f6 | 78 | * .aux_data_ref_count = 0}; |
| DiegoOstuni | 0:de13951f30f6 | 79 | * |
| DiegoOstuni | 0:de13951f30f6 | 80 | * NDEF_AddAlternativeCarrier(&wAC_BREDR,"urn:nfc:handover:bredr", NULL,&HandoverRecord ); |
| DiegoOstuni | 0:de13951f30f6 | 81 | * NDEF_AddAlternativeCarrier(&wAC_BLE,"urn:nfc:handover:ble", NULL,&HandoverRecord ); |
| DiegoOstuni | 0:de13951f30f6 | 82 | * NDEF_AddAlternativeCarrier(&wAC_Wifi,"urn:nfc:handover:wifi", NULL,&HandoverRecord ); |
| DiegoOstuni | 0:de13951f30f6 | 83 | * @note |
| DiegoOstuni | 0:de13951f30f6 | 84 | * 1. In this example a single `Ndef_Handover_alternative_carrier_t` could have been used, as the parameters are the same for all ACs. |
| DiegoOstuni | 0:de13951f30f6 | 85 | * 2. If more than one NDEF record is required to provide the AC connection details, the `aux_data_ref_count` must specify the number of additional records. |
| DiegoOstuni | 0:de13951f30f6 | 86 | * |
| DiegoOstuni | 0:de13951f30f6 | 87 | * Ndef_Handover_alternative_carrier_t wAC_Wifi = {.cps = NDEF_HANDOVER_AC_CPS_ACTIVE, |
| DiegoOstuni | 0:de13951f30f6 | 88 | * .aux_data_ref_count = 2}; |
| DiegoOstuni | 0:de13951f30f6 | 89 | * Then, it's required to initialize an array of pointers to these Auxiliary Data Reference, as: |
| DiegoOstuni | 0:de13951f30f6 | 90 | * |
| DiegoOstuni | 0:de13951f30f6 | 91 | * char *aux_data_ref1 = "urn:nfc:handover:wifi:aux_data_ref1"; |
| DiegoOstuni | 0:de13951f30f6 | 92 | * char *aux_data_ref2 = "urn:nfc:handover:wifi:aux_data_ref2"; |
| DiegoOstuni | 0:de13951f30f6 | 93 | * char *wifi_aux_ref_data_array[2] = {aux_data_ref1,aux_data_ref2}; |
| DiegoOstuni | 0:de13951f30f6 | 94 | * And then provide this array as the 3rd argument to the 'NDEF_AddAlternativeCarrier' function: |
| DiegoOstuni | 0:de13951f30f6 | 95 | * |
| DiegoOstuni | 0:de13951f30f6 | 96 | * NDEF_AddAlternativeCarrier(&wAC_Wifi,"urn:nfc:handover:wifi", wifi_aux_ref_data_array,&HandoverRecord ); |
| DiegoOstuni | 0:de13951f30f6 | 97 | * 6. Call the `NDEF_WriteHandover` function to finalize the NDEF message and write it to the tag. |
| DiegoOstuni | 0:de13951f30f6 | 98 | * |
| DiegoOstuni | 0:de13951f30f6 | 99 | * NDEF_WriteHandover(&HandoverRecord, NDEF_Buffer); |
| DiegoOstuni | 0:de13951f30f6 | 100 | * 7. Then call other functions (from the libNDEF or not) to add records, describing the Alternative Carriers, to the NDEF message: |
| DiegoOstuni | 0:de13951f30f6 | 101 | * |
| DiegoOstuni | 0:de13951f30f6 | 102 | * NDEF_AppendBluetoothOOB ( &w_ble_oob, "urn:nfc:handover:ble" ); |
| DiegoOstuni | 0:de13951f30f6 | 103 | * NDEF_AppendBluetoothOOB ( &w_bredr_oob, "urn:nfc:handover:bredr" ); |
| DiegoOstuni | 0:de13951f30f6 | 104 | * @note |
| DiegoOstuni | 0:de13951f30f6 | 105 | * 1. The ID of these additional records (2nd argument in the above example) must match the Data Reference provided within the Handover record. |
| DiegoOstuni | 0:de13951f30f6 | 106 | * 2. If Auxiliary Data References are expected they must also be added to the NDEF message, with their ID matching the ID provided to the Alternative Carrier record. |
| DiegoOstuni | 0:de13951f30f6 | 107 | * |
| DiegoOstuni | 0:de13951f30f6 | 108 | * @section Reading_Handover Reading through a Handover Request message |
| DiegoOstuni | 0:de13951f30f6 | 109 | * 1. Read the 1st record of the NDEF message: |
| DiegoOstuni | 0:de13951f30f6 | 110 | * |
| DiegoOstuni | 0:de13951f30f6 | 111 | * sRecordInfo_t rRecord; |
| DiegoOstuni | 0:de13951f30f6 | 112 | * NDEF_ReadNDEF(NDEF_Buffer); |
| DiegoOstuni | 0:de13951f30f6 | 113 | * NDEF_IdentifyBuffer(rRecord,NDEF_Buffer); |
| DiegoOstuni | 0:de13951f30f6 | 114 | * 2. Decode the handover: |
| DiegoOstuni | 0:de13951f30f6 | 115 | * |
| DiegoOstuni | 0:de13951f30f6 | 116 | * Ndef_Handover_t rHandover; |
| DiegoOstuni | 0:de13951f30f6 | 117 | * NDEF_ReadHandover(&rRecord , &rHandover ); |
| DiegoOstuni | 0:de13951f30f6 | 118 | * 3. Read all Alternative Carrier records, and their Auxiliary Data References if any. |
| DiegoOstuni | 0:de13951f30f6 | 119 | * |
| DiegoOstuni | 0:de13951f30f6 | 120 | * uint8_t ac_index, aux_index; |
| DiegoOstuni | 0:de13951f30f6 | 121 | * for(ac_index=0;ac_index<rHandover.nb_alternative_carrier;ac_index++) |
| DiegoOstuni | 0:de13951f30f6 | 122 | * { |
| DiegoOstuni | 0:de13951f30f6 | 123 | * Ndef_Handover_alternative_carrier_t rAC; |
| DiegoOstuni | 0:de13951f30f6 | 124 | * NDEF_ReadAC( ac_index, &rHandover , &rAC ); |
| DiegoOstuni | 0:de13951f30f6 | 125 | * for(aux_index = 0; aux_index < rAC.aux_data_ref_count; aux_index++) |
| DiegoOstuni | 0:de13951f30f6 | 126 | * { |
| DiegoOstuni | 0:de13951f30f6 | 127 | * sRecordInfo_t AuxRecord; |
| DiegoOstuni | 0:de13951f30f6 | 128 | * NDEF_ReadAuxData( aux_index, &rAC, &AuxRecord ); |
| DiegoOstuni | 0:de13951f30f6 | 129 | * // Do something with this Auxiliary Data |
| DiegoOstuni | 0:de13951f30f6 | 130 | * } |
| DiegoOstuni | 0:de13951f30f6 | 131 | * // Process this AC (Extract OOB/or whatever data), and decide if this Carrier is supported or not. |
| DiegoOstuni | 0:de13951f30f6 | 132 | * } |
| DiegoOstuni | 0:de13951f30f6 | 133 | * 4. Choose the prefered Carrier and write a Handover Select record with the prefered AC as described in the @ref Static_Handover section. |
| DiegoOstuni | 0:de13951f30f6 | 134 | * @{ |
| DiegoOstuni | 0:de13951f30f6 | 135 | */ |
| DiegoOstuni | 0:de13951f30f6 | 136 | |
| DiegoOstuni | 0:de13951f30f6 | 137 | |
| DiegoOstuni | 0:de13951f30f6 | 138 | |
| DiegoOstuni | 0:de13951f30f6 | 139 | /** |
| DiegoOstuni | 0:de13951f30f6 | 140 | * @brief This function searches the NDEF message to retrieve the nth Auxiliary Data record if present. |
| DiegoOstuni | 0:de13951f30f6 | 141 | * @param aux_data_nb Position of the Auxiliary Data Reference in the Alternative Carrier. |
| DiegoOstuni | 0:de13951f30f6 | 142 | * @param pAC Pointer on the Alternative Carrier structure where to find the Auxiliary Data Reference. |
| DiegoOstuni | 0:de13951f30f6 | 143 | * @param pRecord Pointer to return the output Auxiliary Data record. |
| DiegoOstuni | 0:de13951f30f6 | 144 | * @retval NDEF_OK The Auxiliary Data record has been retrieved. |
| DiegoOstuni | 0:de13951f30f6 | 145 | * @retval NDEF_ERROR Not able to find the Auxiliary Data in the NDEF message. |
| DiegoOstuni | 0:de13951f30f6 | 146 | */ |
| DiegoOstuni | 0:de13951f30f6 | 147 | uint16_t NDEF_ReadAuxData( uint8_t aux_data_nb, Ndef_Handover_alternative_carrier_t *pAC, sRecordInfo_t *pRecord ) |
| DiegoOstuni | 0:de13951f30f6 | 148 | { |
| DiegoOstuni | 0:de13951f30f6 | 149 | uint16_t status; |
| DiegoOstuni | 0:de13951f30f6 | 150 | uint8_t* pData = pAC->aux_data_ref_start; |
| DiegoOstuni | 0:de13951f30f6 | 151 | uint8_t current_aux = 0; |
| DiegoOstuni | 0:de13951f30f6 | 152 | uint8_t* aux_id; |
| DiegoOstuni | 0:de13951f30f6 | 153 | uint8_t aux_id_length; |
| DiegoOstuni | 0:de13951f30f6 | 154 | |
| DiegoOstuni | 0:de13951f30f6 | 155 | if((pAC->aux_data_ref_start == NULL) || |
| DiegoOstuni | 0:de13951f30f6 | 156 | (pAC->aux_data_ref_end == NULL) || |
| DiegoOstuni | 0:de13951f30f6 | 157 | (pAC->aux_data_ref_count == 0) || |
| DiegoOstuni | 0:de13951f30f6 | 158 | (aux_data_nb >= pAC->aux_data_ref_count)) |
| DiegoOstuni | 0:de13951f30f6 | 159 | return NDEF_ERROR; |
| DiegoOstuni | 0:de13951f30f6 | 160 | |
| DiegoOstuni | 0:de13951f30f6 | 161 | |
| DiegoOstuni | 0:de13951f30f6 | 162 | while((current_aux < aux_data_nb) && (pData < pAC->aux_data_ref_end)) |
| DiegoOstuni | 0:de13951f30f6 | 163 | { |
| DiegoOstuni | 0:de13951f30f6 | 164 | aux_id_length = *pData++; |
| DiegoOstuni | 0:de13951f30f6 | 165 | aux_id = pData; |
| DiegoOstuni | 0:de13951f30f6 | 166 | pData += aux_id_length; |
| DiegoOstuni | 0:de13951f30f6 | 167 | current_aux++; |
| DiegoOstuni | 0:de13951f30f6 | 168 | } |
| DiegoOstuni | 0:de13951f30f6 | 169 | |
| DiegoOstuni | 0:de13951f30f6 | 170 | pData = pAC->aux_data_ref_end; |
| DiegoOstuni | 0:de13951f30f6 | 171 | /* if ac has been found */ |
| DiegoOstuni | 0:de13951f30f6 | 172 | if(current_aux == aux_data_nb) |
| DiegoOstuni | 0:de13951f30f6 | 173 | { |
| DiegoOstuni | 0:de13951f30f6 | 174 | /* let's now look for the corresponding record - must be after the Handover record */ |
| DiegoOstuni | 0:de13951f30f6 | 175 | do { |
| DiegoOstuni | 0:de13951f30f6 | 176 | status = NDEF_IdentifyBuffer(pRecord,pData); |
| DiegoOstuni | 0:de13951f30f6 | 177 | if(status != NDEF_OK) return status; |
| DiegoOstuni | 0:de13951f30f6 | 178 | pData = pAC->ac_record.PayloadBufferAdd; |
| DiegoOstuni | 0:de13951f30f6 | 179 | |
| DiegoOstuni | 0:de13951f30f6 | 180 | if((pRecord->IDLength == aux_id_length) && |
| DiegoOstuni | 0:de13951f30f6 | 181 | !memcmp(pRecord->ID, aux_id,aux_id_length)) |
| DiegoOstuni | 0:de13951f30f6 | 182 | { |
| DiegoOstuni | 0:de13951f30f6 | 183 | /* this is the record we were looking for, so exit */ |
| DiegoOstuni | 0:de13951f30f6 | 184 | return NDEF_OK; |
| DiegoOstuni | 0:de13951f30f6 | 185 | } |
| DiegoOstuni | 0:de13951f30f6 | 186 | |
| DiegoOstuni | 0:de13951f30f6 | 187 | // go to next record |
| DiegoOstuni | 0:de13951f30f6 | 188 | pData = pRecord->PayloadBufferAdd + pRecord->PayloadLength; |
| DiegoOstuni | 0:de13951f30f6 | 189 | |
| DiegoOstuni | 0:de13951f30f6 | 190 | } while (!(pRecord->RecordFlags & MB_Mask)); |
| DiegoOstuni | 0:de13951f30f6 | 191 | |
| DiegoOstuni | 0:de13951f30f6 | 192 | } |
| DiegoOstuni | 0:de13951f30f6 | 193 | // if we go there, it means that the record ID is not found |
| DiegoOstuni | 0:de13951f30f6 | 194 | return NDEF_ERROR; |
| DiegoOstuni | 0:de13951f30f6 | 195 | } |
| DiegoOstuni | 0:de13951f30f6 | 196 | |
| DiegoOstuni | 0:de13951f30f6 | 197 | |
| DiegoOstuni | 0:de13951f30f6 | 198 | |
| DiegoOstuni | 0:de13951f30f6 | 199 | /** |
| DiegoOstuni | 0:de13951f30f6 | 200 | * @brief This function reads the NDEF message and retrieves the nth Alternative Carrier record if present. |
| DiegoOstuni | 0:de13951f30f6 | 201 | * @param ac_nb Position of the Alternative Carrier Reference in the Handover record. |
| DiegoOstuni | 0:de13951f30f6 | 202 | * @param pHandover Pointer to the Handover record where to find the AC Reference Data. |
| DiegoOstuni | 0:de13951f30f6 | 203 | * @param pAC Pointer used to return the output Alternative Carrier record. |
| DiegoOstuni | 0:de13951f30f6 | 204 | * @retval NDEF_OK The Alternative Carrier record has been retrieved. |
| DiegoOstuni | 0:de13951f30f6 | 205 | * @retval NDEF_ERROR Not able to find the Alternative Carrier in the NDEF message. |
| DiegoOstuni | 0:de13951f30f6 | 206 | */ |
| DiegoOstuni | 0:de13951f30f6 | 207 | uint16_t NDEF_ReadAC( uint8_t ac_nb, Ndef_Handover_t *pHandover , Ndef_Handover_alternative_carrier_t *pAC ) |
| DiegoOstuni | 0:de13951f30f6 | 208 | { |
| DiegoOstuni | 0:de13951f30f6 | 209 | uint16_t status; |
| DiegoOstuni | 0:de13951f30f6 | 210 | uint8_t* pData = pHandover->ac_start; |
| DiegoOstuni | 0:de13951f30f6 | 211 | uint8_t current_ac = 0; |
| DiegoOstuni | 0:de13951f30f6 | 212 | uint8_t* ac_id; |
| DiegoOstuni | 0:de13951f30f6 | 213 | uint8_t ac_id_length; |
| DiegoOstuni | 0:de13951f30f6 | 214 | sRecordInfo_t NestedRecord; |
| DiegoOstuni | 0:de13951f30f6 | 215 | uint8_t ac_found = 0; |
| DiegoOstuni | 0:de13951f30f6 | 216 | |
| DiegoOstuni | 0:de13951f30f6 | 217 | if((pHandover->ac_start == NULL) || |
| DiegoOstuni | 0:de13951f30f6 | 218 | (pHandover->ac_end == NULL) || |
| DiegoOstuni | 0:de13951f30f6 | 219 | (pHandover->nb_alternative_carrier == 0) || |
| DiegoOstuni | 0:de13951f30f6 | 220 | (ac_nb >= pHandover->nb_alternative_carrier)) |
| DiegoOstuni | 0:de13951f30f6 | 221 | return NDEF_ERROR; |
| DiegoOstuni | 0:de13951f30f6 | 222 | |
| DiegoOstuni | 0:de13951f30f6 | 223 | // Default handover init |
| DiegoOstuni | 0:de13951f30f6 | 224 | pAC->aux_data_ref_count = 0; |
| DiegoOstuni | 0:de13951f30f6 | 225 | |
| DiegoOstuni | 0:de13951f30f6 | 226 | while((current_ac <= ac_nb)&&(current_ac <= pHandover->nb_alternative_carrier) && (pData < pHandover->ac_end)) |
| DiegoOstuni | 0:de13951f30f6 | 227 | { |
| DiegoOstuni | 0:de13951f30f6 | 228 | status = NDEF_IdentifyBuffer(&NestedRecord,pData); |
| DiegoOstuni | 0:de13951f30f6 | 229 | if(status != NDEF_OK) return status; |
| DiegoOstuni | 0:de13951f30f6 | 230 | // go to payload address |
| DiegoOstuni | 0:de13951f30f6 | 231 | pData = NestedRecord.PayloadBufferAdd; |
| DiegoOstuni | 0:de13951f30f6 | 232 | |
| DiegoOstuni | 0:de13951f30f6 | 233 | if(!memcmp(NestedRecord.Type,NDEF_HANDOVER_ALTERNATIVE_CARRIER_TYPE_STR,strlen(NDEF_HANDOVER_ALTERNATIVE_CARRIER_TYPE_STR))) |
| DiegoOstuni | 0:de13951f30f6 | 234 | { |
| DiegoOstuni | 0:de13951f30f6 | 235 | if(current_ac == ac_nb) |
| DiegoOstuni | 0:de13951f30f6 | 236 | { |
| DiegoOstuni | 0:de13951f30f6 | 237 | // parse the AC now |
| DiegoOstuni | 0:de13951f30f6 | 238 | pAC->cps = pData[0] & NDEF_HANDOVER_AC_CPS_MASK; |
| DiegoOstuni | 0:de13951f30f6 | 239 | ac_id_length = pData[1]; |
| DiegoOstuni | 0:de13951f30f6 | 240 | ac_id = &pData[2]; |
| DiegoOstuni | 0:de13951f30f6 | 241 | pAC->aux_data_ref_count = pData[2 + ac_id_length]; |
| DiegoOstuni | 0:de13951f30f6 | 242 | pAC->aux_data_ref_start = &pData[3 + ac_id_length]; |
| DiegoOstuni | 0:de13951f30f6 | 243 | pAC->aux_data_ref_end = pData + NestedRecord.PayloadLength; |
| DiegoOstuni | 0:de13951f30f6 | 244 | ac_found = 1; |
| DiegoOstuni | 0:de13951f30f6 | 245 | } |
| DiegoOstuni | 0:de13951f30f6 | 246 | current_ac++; |
| DiegoOstuni | 0:de13951f30f6 | 247 | } |
| DiegoOstuni | 0:de13951f30f6 | 248 | // go to next record |
| DiegoOstuni | 0:de13951f30f6 | 249 | pData += NestedRecord.PayloadLength; |
| DiegoOstuni | 0:de13951f30f6 | 250 | } |
| DiegoOstuni | 0:de13951f30f6 | 251 | pData = pHandover->ac_end; |
| DiegoOstuni | 0:de13951f30f6 | 252 | /* if ac has been found */ |
| DiegoOstuni | 0:de13951f30f6 | 253 | if(ac_found) |
| DiegoOstuni | 0:de13951f30f6 | 254 | { |
| DiegoOstuni | 0:de13951f30f6 | 255 | /* let's now look for the corresponding record - must be after the Handover record */ |
| DiegoOstuni | 0:de13951f30f6 | 256 | do { |
| DiegoOstuni | 0:de13951f30f6 | 257 | status = NDEF_IdentifyBuffer(&pAC->ac_record,pData); |
| DiegoOstuni | 0:de13951f30f6 | 258 | if(status != NDEF_OK) return status; |
| DiegoOstuni | 0:de13951f30f6 | 259 | pData = pAC->ac_record.PayloadBufferAdd; |
| DiegoOstuni | 0:de13951f30f6 | 260 | |
| DiegoOstuni | 0:de13951f30f6 | 261 | if((pAC->ac_record.IDLength == ac_id_length) && |
| DiegoOstuni | 0:de13951f30f6 | 262 | !memcmp(pAC->ac_record.ID, ac_id,ac_id_length)) |
| DiegoOstuni | 0:de13951f30f6 | 263 | { |
| DiegoOstuni | 0:de13951f30f6 | 264 | /* this is the record we were looking for, so exit */ |
| DiegoOstuni | 0:de13951f30f6 | 265 | return NDEF_OK; |
| DiegoOstuni | 0:de13951f30f6 | 266 | } |
| DiegoOstuni | 0:de13951f30f6 | 267 | |
| DiegoOstuni | 0:de13951f30f6 | 268 | // go to next record |
| DiegoOstuni | 0:de13951f30f6 | 269 | pData = pAC->ac_record.PayloadBufferAdd + pAC->ac_record.PayloadLength; |
| DiegoOstuni | 0:de13951f30f6 | 270 | // TO DO: add a security condition to avoid infinite loop if NDEF file is corrupted |
| DiegoOstuni | 0:de13951f30f6 | 271 | } while (!(pAC->ac_record.RecordFlags & ME_Mask)); |
| DiegoOstuni | 0:de13951f30f6 | 272 | |
| DiegoOstuni | 0:de13951f30f6 | 273 | } |
| DiegoOstuni | 0:de13951f30f6 | 274 | // if we go there, it means that the record ID is not found |
| DiegoOstuni | 0:de13951f30f6 | 275 | return NDEF_ERROR; |
| DiegoOstuni | 0:de13951f30f6 | 276 | } |
| DiegoOstuni | 0:de13951f30f6 | 277 | |
| DiegoOstuni | 0:de13951f30f6 | 278 | |
| DiegoOstuni | 0:de13951f30f6 | 279 | /** |
| DiegoOstuni | 0:de13951f30f6 | 280 | * @brief This function reads a record and retrieves the Handover information if present. |
| DiegoOstuni | 0:de13951f30f6 | 281 | * @param pRecord Pointer on the record structure to be read. |
| DiegoOstuni | 0:de13951f30f6 | 282 | * @param pHandover Pointer used to return the Handover information. |
| DiegoOstuni | 0:de13951f30f6 | 283 | * @retval NDEF_OK Handover information has been retrieved from the record. |
| DiegoOstuni | 0:de13951f30f6 | 284 | * @retval NDEF_ERROR Not able to read the Handover information from the record. |
| DiegoOstuni | 0:de13951f30f6 | 285 | */ |
| DiegoOstuni | 0:de13951f30f6 | 286 | uint16_t NDEF_ReadHandover(sRecordInfo_t *pRecord , Ndef_Handover_t *pHandover ) |
| DiegoOstuni | 0:de13951f30f6 | 287 | { |
| DiegoOstuni | 0:de13951f30f6 | 288 | uint16_t status; |
| DiegoOstuni | 0:de13951f30f6 | 289 | uint8_t* pData = pRecord->PayloadBufferAdd; |
| DiegoOstuni | 0:de13951f30f6 | 290 | uint8_t* pEnd = pData + pRecord->PayloadLength; |
| DiegoOstuni | 0:de13951f30f6 | 291 | sRecordInfo_t NestedRecord; |
| DiegoOstuni | 0:de13951f30f6 | 292 | |
| DiegoOstuni | 0:de13951f30f6 | 293 | /* Default Handover Structure init */ |
| DiegoOstuni | 0:de13951f30f6 | 294 | pHandover->version =0; |
| DiegoOstuni | 0:de13951f30f6 | 295 | pHandover->nb_alternative_carrier =0; |
| DiegoOstuni | 0:de13951f30f6 | 296 | pHandover->has_cr = 0; |
| DiegoOstuni | 0:de13951f30f6 | 297 | pHandover->ac_start = NULL; |
| DiegoOstuni | 0:de13951f30f6 | 298 | pHandover->ac_end = NULL; |
| DiegoOstuni | 0:de13951f30f6 | 299 | |
| DiegoOstuni | 0:de13951f30f6 | 300 | /* A Handover record should never be the end of the NDEF message */ |
| DiegoOstuni | 0:de13951f30f6 | 301 | if(pRecord->RecordFlags & ME_Mask) |
| DiegoOstuni | 0:de13951f30f6 | 302 | return NDEF_ERROR; |
| DiegoOstuni | 0:de13951f30f6 | 303 | |
| DiegoOstuni | 0:de13951f30f6 | 304 | if( !memcmp(pRecord->Type,NDEF_HANDOVER_REQUEST_TYPE_STR,strlen(NDEF_HANDOVER_REQUEST_TYPE_STR)) ) |
| DiegoOstuni | 0:de13951f30f6 | 305 | { |
| DiegoOstuni | 0:de13951f30f6 | 306 | pHandover->type = NDEF_HANDOVER_REQUEST_TYPE; |
| DiegoOstuni | 0:de13951f30f6 | 307 | } else if ( !memcmp(pRecord->Type,NDEF_HANDOVER_SELECT_TYPE_STR,strlen(NDEF_HANDOVER_SELECT_TYPE_STR)) ) |
| DiegoOstuni | 0:de13951f30f6 | 308 | { |
| DiegoOstuni | 0:de13951f30f6 | 309 | pHandover->type = NDEF_HANDOVER_SELECT_TYPE; |
| DiegoOstuni | 0:de13951f30f6 | 310 | } else { |
| DiegoOstuni | 0:de13951f30f6 | 311 | /* This is not a Handover record! */ |
| DiegoOstuni | 0:de13951f30f6 | 312 | return NDEF_ERROR; |
| DiegoOstuni | 0:de13951f30f6 | 313 | } |
| DiegoOstuni | 0:de13951f30f6 | 314 | |
| DiegoOstuni | 0:de13951f30f6 | 315 | pHandover->version = *pData++; |
| DiegoOstuni | 0:de13951f30f6 | 316 | |
| DiegoOstuni | 0:de13951f30f6 | 317 | /* Following records are nested into Hr/s record */ |
| DiegoOstuni | 0:de13951f30f6 | 318 | while (pData < pEnd) |
| DiegoOstuni | 0:de13951f30f6 | 319 | { |
| DiegoOstuni | 0:de13951f30f6 | 320 | status = NDEF_IdentifyBuffer(&NestedRecord,pData); |
| DiegoOstuni | 0:de13951f30f6 | 321 | if(status != NDEF_OK) return status; |
| DiegoOstuni | 0:de13951f30f6 | 322 | /* save record address */ |
| DiegoOstuni | 0:de13951f30f6 | 323 | uint8_t* pACRecord = pData; |
| DiegoOstuni | 0:de13951f30f6 | 324 | /* go to payload address */ |
| DiegoOstuni | 0:de13951f30f6 | 325 | pData = NestedRecord.PayloadBufferAdd; |
| DiegoOstuni | 0:de13951f30f6 | 326 | |
| DiegoOstuni | 0:de13951f30f6 | 327 | /* Parse Collision Resolution if Handover request */ |
| DiegoOstuni | 0:de13951f30f6 | 328 | if(pHandover->type == NDEF_HANDOVER_REQUEST_TYPE) |
| DiegoOstuni | 0:de13951f30f6 | 329 | { |
| DiegoOstuni | 0:de13951f30f6 | 330 | |
| DiegoOstuni | 0:de13951f30f6 | 331 | if(!memcmp(NestedRecord.Type,NDEF_HANDOVER_COLLISION_RESOLUTION_TYPE_STR,strlen(NDEF_HANDOVER_COLLISION_RESOLUTION_TYPE_STR))) |
| DiegoOstuni | 0:de13951f30f6 | 332 | { |
| DiegoOstuni | 0:de13951f30f6 | 333 | pHandover->has_cr = 1; |
| DiegoOstuni | 0:de13951f30f6 | 334 | pHandover->cr_random_number = *(uint16_t*)pData; |
| DiegoOstuni | 0:de13951f30f6 | 335 | } |
| DiegoOstuni | 0:de13951f30f6 | 336 | } |
| DiegoOstuni | 0:de13951f30f6 | 337 | |
| DiegoOstuni | 0:de13951f30f6 | 338 | /* Parse AlternativeCarriers just to know how many they are */ |
| DiegoOstuni | 0:de13951f30f6 | 339 | else if(!memcmp(NestedRecord.Type,NDEF_HANDOVER_ALTERNATIVE_CARRIER_TYPE_STR,strlen(NDEF_HANDOVER_ALTERNATIVE_CARRIER_TYPE_STR))) |
| DiegoOstuni | 0:de13951f30f6 | 340 | { |
| DiegoOstuni | 0:de13951f30f6 | 341 | pHandover->nb_alternative_carrier++; |
| DiegoOstuni | 0:de13951f30f6 | 342 | if(pHandover->ac_start == NULL) |
| DiegoOstuni | 0:de13951f30f6 | 343 | pHandover->ac_start = pACRecord; |
| DiegoOstuni | 0:de13951f30f6 | 344 | pHandover->ac_end = pData + NestedRecord.PayloadLength; |
| DiegoOstuni | 0:de13951f30f6 | 345 | /* don't parse the AC now */ |
| DiegoOstuni | 0:de13951f30f6 | 346 | } |
| DiegoOstuni | 0:de13951f30f6 | 347 | else { |
| DiegoOstuni | 0:de13951f30f6 | 348 | /* this is an unexpected type, just ignore it */ |
| DiegoOstuni | 0:de13951f30f6 | 349 | } |
| DiegoOstuni | 0:de13951f30f6 | 350 | /* go to next record */ |
| DiegoOstuni | 0:de13951f30f6 | 351 | pData += NestedRecord.PayloadLength; |
| DiegoOstuni | 0:de13951f30f6 | 352 | |
| DiegoOstuni | 0:de13951f30f6 | 353 | } |
| DiegoOstuni | 0:de13951f30f6 | 354 | |
| DiegoOstuni | 0:de13951f30f6 | 355 | return NDEF_OK; |
| DiegoOstuni | 0:de13951f30f6 | 356 | } |
| DiegoOstuni | 0:de13951f30f6 | 357 | |
| DiegoOstuni | 0:de13951f30f6 | 358 | /** |
| DiegoOstuni | 0:de13951f30f6 | 359 | * @brief This function prepares the Handover record with the data given in the Handover structure. |
| DiegoOstuni | 0:de13951f30f6 | 360 | * @param pHandover Pointer on structure containing the handover basic information. |
| DiegoOstuni | 0:de13951f30f6 | 361 | * @param pRecord Pointer used to return the prepared Handover record. |
| DiegoOstuni | 0:de13951f30f6 | 362 | * @retval NDEF_OK The record has been prepared. |
| DiegoOstuni | 0:de13951f30f6 | 363 | * @retval NDEF_ERROR The record has not been prepared. |
| DiegoOstuni | 0:de13951f30f6 | 364 | */ |
| DiegoOstuni | 0:de13951f30f6 | 365 | uint16_t NDEF_CreateHandover(Ndef_Handover_t *pHandover, sRecordInfo_t* pRecord ) |
| DiegoOstuni | 0:de13951f30f6 | 366 | { |
| DiegoOstuni | 0:de13951f30f6 | 367 | uint16_t status = NDEF_ERROR; |
| DiegoOstuni | 0:de13951f30f6 | 368 | |
| DiegoOstuni | 0:de13951f30f6 | 369 | /* Use a static buffer to prepare the Handover record */ |
| DiegoOstuni | 0:de13951f30f6 | 370 | pRecord->PayloadBufferAdd = NDEF_Record_Buffer; |
| DiegoOstuni | 0:de13951f30f6 | 371 | /* Alternative, where the user must first allocate the Payload buffer in the record: |
| DiegoOstuni | 0:de13951f30f6 | 372 | * if (pRecord->PayloadBufferAdd == NULL) |
| DiegoOstuni | 0:de13951f30f6 | 373 | * return NDEF_ERROR; |
| DiegoOstuni | 0:de13951f30f6 | 374 | */ |
| DiegoOstuni | 0:de13951f30f6 | 375 | |
| DiegoOstuni | 0:de13951f30f6 | 376 | /* Handover MUST be the first record (SR mask to be updated when actually writing the record) */ |
| DiegoOstuni | 0:de13951f30f6 | 377 | pRecord->RecordFlags = MB_Mask | ME_Mask | TNF_WellKnown; |
| DiegoOstuni | 0:de13951f30f6 | 378 | |
| DiegoOstuni | 0:de13951f30f6 | 379 | if(pHandover->type == NDEF_HANDOVER_SELECT_TYPE) |
| DiegoOstuni | 0:de13951f30f6 | 380 | { |
| DiegoOstuni | 0:de13951f30f6 | 381 | pRecord->TypeLength = strlen(NDEF_HANDOVER_SELECT_TYPE_STR); |
| DiegoOstuni | 0:de13951f30f6 | 382 | memcpy(pRecord->Type, NDEF_HANDOVER_SELECT_TYPE_STR,pRecord->TypeLength); |
| DiegoOstuni | 0:de13951f30f6 | 383 | } |
| DiegoOstuni | 0:de13951f30f6 | 384 | else if (pHandover->type == NDEF_HANDOVER_REQUEST_TYPE) |
| DiegoOstuni | 0:de13951f30f6 | 385 | { |
| DiegoOstuni | 0:de13951f30f6 | 386 | pRecord->TypeLength = strlen(NDEF_HANDOVER_SELECT_TYPE_STR); |
| DiegoOstuni | 0:de13951f30f6 | 387 | memcpy(pRecord->Type, NDEF_HANDOVER_REQUEST_TYPE_STR,pRecord->TypeLength); |
| DiegoOstuni | 0:de13951f30f6 | 388 | } |
| DiegoOstuni | 0:de13951f30f6 | 389 | else |
| DiegoOstuni | 0:de13951f30f6 | 390 | return NDEF_ERROR; |
| DiegoOstuni | 0:de13951f30f6 | 391 | |
| DiegoOstuni | 0:de13951f30f6 | 392 | pRecord->PayloadLength = sizeof(pHandover->version); |
| DiegoOstuni | 0:de13951f30f6 | 393 | *pRecord->PayloadBufferAdd = pHandover->version; |
| DiegoOstuni | 0:de13951f30f6 | 394 | |
| DiegoOstuni | 0:de13951f30f6 | 395 | /* Don't write the record for now, additionnal Alternative Carriers to come as nested records. */ |
| DiegoOstuni | 0:de13951f30f6 | 396 | |
| DiegoOstuni | 0:de13951f30f6 | 397 | return status; |
| DiegoOstuni | 0:de13951f30f6 | 398 | } |
| DiegoOstuni | 0:de13951f30f6 | 399 | |
| DiegoOstuni | 0:de13951f30f6 | 400 | |
| DiegoOstuni | 0:de13951f30f6 | 401 | /** |
| DiegoOstuni | 0:de13951f30f6 | 402 | * @brief This function adds an Alternative Carrier record to a Handover record using the data given in the AC structure. |
| DiegoOstuni | 0:de13951f30f6 | 403 | * @param pAC Pointer on input AC structure. |
| DiegoOstuni | 0:de13951f30f6 | 404 | * @param CarrierDataRef String with the Alternative Carrier Data Reference (ID of the corresponding record in the NDEF message). |
| DiegoOstuni | 0:de13951f30f6 | 405 | * @param AuxDataRefID Array with pointers to the Auxiliary Data References (as many as defined in pAC structure). |
| DiegoOstuni | 0:de13951f30f6 | 406 | * @param pRecord Pointer on the Handover record to be filled with the AC data, must have been previously initialized with the NDEF_CreateHandover function. |
| DiegoOstuni | 0:de13951f30f6 | 407 | * @retval NDEF_OK The Handover record has been updated with AC information. |
| DiegoOstuni | 0:de13951f30f6 | 408 | * @retval NDEF_ERROR The Handover record cannot be updated with the AC information. |
| DiegoOstuni | 0:de13951f30f6 | 409 | * @retval NDEF_ERROR_MEMORY_INTERNAL The internal buffer for records is too small to add the AC information. |
| DiegoOstuni | 0:de13951f30f6 | 410 | */ |
| DiegoOstuni | 0:de13951f30f6 | 411 | uint16_t NDEF_AddAlternativeCarrier(Ndef_Handover_alternative_carrier_t *pAC,char *CarrierDataRef, char **AuxDataRefID, sRecordInfo_t* pRecord, I2C* mi2cChannel ) |
| DiegoOstuni | 0:de13951f30f6 | 412 | { |
| DiegoOstuni | 0:de13951f30f6 | 413 | /* Specific buffer to prepare the Alternative Carrier record */ |
| DiegoOstuni | 0:de13951f30f6 | 414 | uint8_t NDEF_AlternativeCarrier_Buffer[NDEF_AC_BUFFER_SIZE]; |
| DiegoOstuni | 0:de13951f30f6 | 415 | |
| DiegoOstuni | 0:de13951f30f6 | 416 | /* check that there is enough space in the buffers */ |
| DiegoOstuni | 0:de13951f30f6 | 417 | pAC->ac_record.PayloadLength = NDEF_GetACDataLength(pAC,CarrierDataRef,AuxDataRefID); |
| DiegoOstuni | 0:de13951f30f6 | 418 | if(((pRecord->PayloadLength + pAC->ac_record.PayloadLength) > NDEF_RECORD_MAX_SIZE) || |
| DiegoOstuni | 0:de13951f30f6 | 419 | (pAC->ac_record.PayloadLength > NDEF_AC_BUFFER_SIZE)) |
| DiegoOstuni | 0:de13951f30f6 | 420 | return NDEF_ERROR_MEMORY_INTERNAL; |
| DiegoOstuni | 0:de13951f30f6 | 421 | |
| DiegoOstuni | 0:de13951f30f6 | 422 | /* Use specific buffer to prepare the nested record */ |
| DiegoOstuni | 0:de13951f30f6 | 423 | uint8_t *pData = NDEF_AlternativeCarrier_Buffer; |
| DiegoOstuni | 0:de13951f30f6 | 424 | pAC->ac_record.PayloadBufferAdd = pData; |
| DiegoOstuni | 0:de13951f30f6 | 425 | /* Following line is an alternative where the user must allocate the payload buffer of the ac_record: |
| DiegoOstuni | 0:de13951f30f6 | 426 | * uint8_t* pData = pAC->ac_record.PayloadBufferAdd ; |
| DiegoOstuni | 0:de13951f30f6 | 427 | */ |
| DiegoOstuni | 0:de13951f30f6 | 428 | |
| DiegoOstuni | 0:de13951f30f6 | 429 | if ((pRecord->PayloadBufferAdd == NULL) || |
| DiegoOstuni | 0:de13951f30f6 | 430 | (pRecord->PayloadLength == 0)) |
| DiegoOstuni | 0:de13951f30f6 | 431 | return NDEF_ERROR; |
| DiegoOstuni | 0:de13951f30f6 | 432 | |
| DiegoOstuni | 0:de13951f30f6 | 433 | /* AC is not the first record */ |
| DiegoOstuni | 0:de13951f30f6 | 434 | pAC->ac_record.RecordFlags = TNF_WellKnown; |
| DiegoOstuni | 0:de13951f30f6 | 435 | |
| DiegoOstuni | 0:de13951f30f6 | 436 | pAC->ac_record.TypeLength = strlen(NDEF_HANDOVER_ALTERNATIVE_CARRIER_TYPE_STR); |
| DiegoOstuni | 0:de13951f30f6 | 437 | memcpy(pAC->ac_record.Type, NDEF_HANDOVER_ALTERNATIVE_CARRIER_TYPE_STR,pAC->ac_record.TypeLength); |
| DiegoOstuni | 0:de13951f30f6 | 438 | |
| DiegoOstuni | 0:de13951f30f6 | 439 | /* Length : cps byte + data ref length byte + auxiliary data ref count byte + data ref length */ |
| DiegoOstuni | 0:de13951f30f6 | 440 | *pData++ = pAC->cps & NDEF_HANDOVER_AC_CPS_MASK; |
| DiegoOstuni | 0:de13951f30f6 | 441 | *pData++ = strlen(CarrierDataRef); |
| DiegoOstuni | 0:de13951f30f6 | 442 | memcpy(pData, CarrierDataRef, strlen(CarrierDataRef)); |
| DiegoOstuni | 0:de13951f30f6 | 443 | pData += strlen(CarrierDataRef); |
| DiegoOstuni | 0:de13951f30f6 | 444 | *pData++ = pAC->aux_data_ref_count; |
| DiegoOstuni | 0:de13951f30f6 | 445 | |
| DiegoOstuni | 0:de13951f30f6 | 446 | uint8_t AuxDataIndex; |
| DiegoOstuni | 0:de13951f30f6 | 447 | for(AuxDataIndex = 0;AuxDataIndex<pAC->aux_data_ref_count;AuxDataIndex++) |
| DiegoOstuni | 0:de13951f30f6 | 448 | { |
| DiegoOstuni | 0:de13951f30f6 | 449 | *pData++ = strlen(AuxDataRefID[AuxDataIndex]); |
| DiegoOstuni | 0:de13951f30f6 | 450 | memcpy(pData, AuxDataRefID[AuxDataIndex], strlen(AuxDataRefID[AuxDataIndex])); |
| DiegoOstuni | 0:de13951f30f6 | 451 | pData += strlen(AuxDataRefID[AuxDataIndex]); |
| DiegoOstuni | 0:de13951f30f6 | 452 | } |
| DiegoOstuni | 0:de13951f30f6 | 453 | |
| DiegoOstuni | 0:de13951f30f6 | 454 | /* Append the nested record right after the Handover record - increase its length accordingly */ |
| DiegoOstuni | 0:de13951f30f6 | 455 | pRecord->PayloadLength += NDEF_WriteRecord(&pAC->ac_record,pRecord->PayloadBufferAdd + pRecord->PayloadLength, mi2cChannel); |
| DiegoOstuni | 0:de13951f30f6 | 456 | return NDEF_OK; |
| DiegoOstuni | 0:de13951f30f6 | 457 | } |
| DiegoOstuni | 0:de13951f30f6 | 458 | |
| DiegoOstuni | 0:de13951f30f6 | 459 | |
| DiegoOstuni | 0:de13951f30f6 | 460 | /** |
| DiegoOstuni | 0:de13951f30f6 | 461 | * @brief This function returns the length of an Alternative Carrier record data (excluding the record metadata). |
| DiegoOstuni | 0:de13951f30f6 | 462 | * @param pAC Pointer on the input AC structure. |
| DiegoOstuni | 0:de13951f30f6 | 463 | * @param CarrierDataRef String with the Alternative Carrier Data Reference. |
| DiegoOstuni | 0:de13951f30f6 | 464 | * @param AuxDataRefID Array with the Auxiliary Data References (as many as defined in the pAC structure). |
| DiegoOstuni | 0:de13951f30f6 | 465 | * @return The computed length in bytes corresponding to the provided Alternative Carrier information. |
| DiegoOstuni | 0:de13951f30f6 | 466 | */ |
| DiegoOstuni | 0:de13951f30f6 | 467 | uint32_t NDEF_GetACDataLength(Ndef_Handover_alternative_carrier_t *pAC,char *CarrierDataRef, char **AuxDataRefID) |
| DiegoOstuni | 0:de13951f30f6 | 468 | { |
| DiegoOstuni | 0:de13951f30f6 | 469 | uint8_t AuxDataIndex; |
| DiegoOstuni | 0:de13951f30f6 | 470 | |
| DiegoOstuni | 0:de13951f30f6 | 471 | /* First compute the Data length */ |
| DiegoOstuni | 0:de13951f30f6 | 472 | uint32_t length = 1 + // cps |
| DiegoOstuni | 0:de13951f30f6 | 473 | 1 + // Carrier data ref length |
| DiegoOstuni | 0:de13951f30f6 | 474 | strlen(CarrierDataRef) + // Carrier data ref |
| DiegoOstuni | 0:de13951f30f6 | 475 | 1 + // auxiliary data count |
| DiegoOstuni | 0:de13951f30f6 | 476 | pAC->aux_data_ref_count * 1; // auxiliary data lengths |
| DiegoOstuni | 0:de13951f30f6 | 477 | |
| DiegoOstuni | 0:de13951f30f6 | 478 | /* Then adds the length of the Auxiliary Data */ |
| DiegoOstuni | 0:de13951f30f6 | 479 | for(AuxDataIndex = 0;AuxDataIndex<pAC->aux_data_ref_count;AuxDataIndex++) |
| DiegoOstuni | 0:de13951f30f6 | 480 | { |
| DiegoOstuni | 0:de13951f30f6 | 481 | length += strlen(AuxDataRefID[AuxDataIndex]); |
| DiegoOstuni | 0:de13951f30f6 | 482 | } |
| DiegoOstuni | 0:de13951f30f6 | 483 | |
| DiegoOstuni | 0:de13951f30f6 | 484 | return length; |
| DiegoOstuni | 0:de13951f30f6 | 485 | } |
| DiegoOstuni | 0:de13951f30f6 | 486 | |
| DiegoOstuni | 0:de13951f30f6 | 487 | /** |
| DiegoOstuni | 0:de13951f30f6 | 488 | * @brief This function writes the Handover record into the memory. |
| DiegoOstuni | 0:de13951f30f6 | 489 | * @param pRecord Pointer on the input Handover record. |
| DiegoOstuni | 0:de13951f30f6 | 490 | * @param pNdef Pointer to a NDEF buffer (used to prepare the data before actual writing to the memory). |
| DiegoOstuni | 0:de13951f30f6 | 491 | * @retval NDEF_OK The memory has been written. |
| DiegoOstuni | 0:de13951f30f6 | 492 | * @retval NDEF_ERROR_MEMORY_INTERNAL Cannot write to tag. |
| DiegoOstuni | 0:de13951f30f6 | 493 | * @retval NDEF_ERROR_NOT_FORMATED CCFile data not supported or not present. |
| DiegoOstuni | 0:de13951f30f6 | 494 | * @retval NDEF_ERROR_MEMORY_TAG Size not compatible with memory. |
| DiegoOstuni | 0:de13951f30f6 | 495 | * @retval NDEF_ERROR_LOCKED Tag locked, cannot be write. |
| DiegoOstuni | 0:de13951f30f6 | 496 | */ |
| DiegoOstuni | 0:de13951f30f6 | 497 | uint16_t NDEF_WriteHandover( sRecordInfo_t* pRecord , uint8_t* pNdef, I2C* mi2cChannel) |
| DiegoOstuni | 0:de13951f30f6 | 498 | { |
| DiegoOstuni | 0:de13951f30f6 | 499 | /* Note: in case of Handover Select for no matching alternative carrier, the ME bit flag must be set by the caller */ |
| DiegoOstuni | 0:de13951f30f6 | 500 | |
| DiegoOstuni | 0:de13951f30f6 | 501 | uint32_t Size = NDEF_WriteRecord(pRecord,pNdef, mi2cChannel); |
| DiegoOstuni | 0:de13951f30f6 | 502 | return NDEF_WriteNDEF(Size,pNdef, mi2cChannel); |
| DiegoOstuni | 0:de13951f30f6 | 503 | } |
| DiegoOstuni | 0:de13951f30f6 | 504 | |
| DiegoOstuni | 0:de13951f30f6 | 505 | /** |
| DiegoOstuni | 0:de13951f30f6 | 506 | * @} |
| DiegoOstuni | 0:de13951f30f6 | 507 | */ |
| DiegoOstuni | 0:de13951f30f6 | 508 | |
| DiegoOstuni | 0:de13951f30f6 | 509 | /******************* (C) COPYRIGHT 2015 STMicroelectronics *****END OF FILE****/ |