Liam Cox
/
sw_encrypt_loraWAN_implementation
SW encryption
main.cpp@49:3b27f622a798, 2019-04-30 (annotated)
- Committer:
- liamcox94
- Date:
- Tue Apr 30 03:03:03 2019 +0000
- Revision:
- 49:3b27f622a798
- Parent:
- 48:b2afcf2d41fb
Dissertation final
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 0:7037ed05f54f | 1 | #include <stdio.h> |
liamcox94 | 48:b2afcf2d41fb | 2 | #include <iostream> |
mbed_official | 3:8c7198d1a2a1 | 3 | |
mbed_official | 0:7037ed05f54f | 4 | #include "lorawan/LoRaWANInterface.h" |
mbed_official | 0:7037ed05f54f | 5 | #include "lorawan/system/lorawan_data_structures.h" |
mbed_official | 0:7037ed05f54f | 6 | #include "events/EventQueue.h" |
mbed_official | 0:7037ed05f54f | 7 | |
mbed_official | 0:7037ed05f54f | 8 | // Application helpers |
mbed_official | 0:7037ed05f54f | 9 | #include "DummySensor.h" |
mbed_official | 0:7037ed05f54f | 10 | #include "trace_helper.h" |
mbed_official | 0:7037ed05f54f | 11 | #include "lora_radio_helper.h" |
mbed_official | 0:7037ed05f54f | 12 | |
liamcox94 | 48:b2afcf2d41fb | 13 | #include "sha256.h" |
liamcox94 | 48:b2afcf2d41fb | 14 | |
mbed_official | 0:7037ed05f54f | 15 | using namespace events; |
mbed_official | 0:7037ed05f54f | 16 | |
mbed_official | 12:5015dfead3f2 | 17 | // Max payload size can be LORAMAC_PHY_MAXPAYLOAD. |
mbed_official | 12:5015dfead3f2 | 18 | // This example only communicates with much shorter messages (<30 bytes). |
mbed_official | 12:5015dfead3f2 | 19 | // If longer messages are used, these buffers must be changed accordingly. |
liamcox94 | 49:3b27f622a798 | 20 | uint8_t tx_buffer[128]; |
liamcox94 | 49:3b27f622a798 | 21 | uint8_t rx_buffer[128]; |
mbed_official | 0:7037ed05f54f | 22 | |
mbed_official | 0:7037ed05f54f | 23 | /* |
mbed_official | 0:7037ed05f54f | 24 | * Sets up an application dependent transmission timer in ms. Used only when Duty Cycling is off for testing |
mbed_official | 0:7037ed05f54f | 25 | */ |
mbed_official | 0:7037ed05f54f | 26 | #define TX_TIMER 10000 |
mbed_official | 0:7037ed05f54f | 27 | |
mbed_official | 0:7037ed05f54f | 28 | /** |
mbed_official | 0:7037ed05f54f | 29 | * Maximum number of events for the event queue. |
mbed_official | 12:5015dfead3f2 | 30 | * 10 is the safe number for the stack events, however, if application |
mbed_official | 0:7037ed05f54f | 31 | * also uses the queue for whatever purposes, this number should be increased. |
mbed_official | 0:7037ed05f54f | 32 | */ |
mbed_official | 12:5015dfead3f2 | 33 | #define MAX_NUMBER_OF_EVENTS 10 |
mbed_official | 0:7037ed05f54f | 34 | |
mbed_official | 0:7037ed05f54f | 35 | /** |
mbed_official | 0:7037ed05f54f | 36 | * Maximum number of retries for CONFIRMED messages before giving up |
mbed_official | 0:7037ed05f54f | 37 | */ |
mbed_official | 0:7037ed05f54f | 38 | #define CONFIRMED_MSG_RETRY_COUNTER 3 |
mbed_official | 0:7037ed05f54f | 39 | |
mbed_official | 0:7037ed05f54f | 40 | /** |
mbed_official | 0:7037ed05f54f | 41 | * Dummy pin for dummy sensor |
mbed_official | 0:7037ed05f54f | 42 | */ |
mbed_official | 0:7037ed05f54f | 43 | #define PC_9 0 |
mbed_official | 0:7037ed05f54f | 44 | |
mbed_official | 0:7037ed05f54f | 45 | /** |
mbed_official | 0:7037ed05f54f | 46 | * Dummy sensor class object |
mbed_official | 0:7037ed05f54f | 47 | */ |
mbed_official | 0:7037ed05f54f | 48 | DS1820 ds1820(PC_9); |
mbed_official | 0:7037ed05f54f | 49 | |
mbed_official | 0:7037ed05f54f | 50 | /** |
mbed_official | 0:7037ed05f54f | 51 | * This event queue is the global event queue for both the |
mbed_official | 0:7037ed05f54f | 52 | * application and stack. To conserve memory, the stack is designed to run |
mbed_official | 0:7037ed05f54f | 53 | * in the same thread as the application and the application is responsible for |
mbed_official | 0:7037ed05f54f | 54 | * providing an event queue to the stack that will be used for ISR deferment as |
mbed_official | 0:7037ed05f54f | 55 | * well as application information event queuing. |
mbed_official | 0:7037ed05f54f | 56 | */ |
mbed_official | 46:a124538e2891 | 57 | static EventQueue ev_queue(MAX_NUMBER_OF_EVENTS *EVENTS_EVENT_SIZE); |
mbed_official | 0:7037ed05f54f | 58 | |
mbed_official | 0:7037ed05f54f | 59 | /** |
mbed_official | 0:7037ed05f54f | 60 | * Event handler. |
mbed_official | 0:7037ed05f54f | 61 | * |
mbed_official | 0:7037ed05f54f | 62 | * This will be passed to the LoRaWAN stack to queue events for the |
mbed_official | 0:7037ed05f54f | 63 | * application which in turn drive the application. |
mbed_official | 0:7037ed05f54f | 64 | */ |
mbed_official | 0:7037ed05f54f | 65 | static void lora_event_handler(lorawan_event_t event); |
mbed_official | 0:7037ed05f54f | 66 | |
mbed_official | 0:7037ed05f54f | 67 | /** |
mbed_official | 46:a124538e2891 | 68 | * Constructing Mbed LoRaWANInterface and passing it the radio object from lora_radio_helper. |
mbed_official | 0:7037ed05f54f | 69 | */ |
mbed_official | 2:dc95ac6d6d4e | 70 | static LoRaWANInterface lorawan(radio); |
mbed_official | 0:7037ed05f54f | 71 | |
mbed_official | 0:7037ed05f54f | 72 | /** |
mbed_official | 0:7037ed05f54f | 73 | * Application specific callbacks |
mbed_official | 0:7037ed05f54f | 74 | */ |
mbed_official | 0:7037ed05f54f | 75 | static lorawan_app_callbacks_t callbacks; |
mbed_official | 0:7037ed05f54f | 76 | |
mbed_official | 0:7037ed05f54f | 77 | /** |
mbed_official | 0:7037ed05f54f | 78 | * Entry point for application |
mbed_official | 0:7037ed05f54f | 79 | */ |
mbed_official | 46:a124538e2891 | 80 | int main(void) |
mbed_official | 0:7037ed05f54f | 81 | { |
mbed_official | 0:7037ed05f54f | 82 | // setup tracing |
mbed_official | 0:7037ed05f54f | 83 | setup_trace(); |
mbed_official | 0:7037ed05f54f | 84 | |
mbed_official | 0:7037ed05f54f | 85 | // stores the status of a call to LoRaWAN protocol |
liamcox94 | 48:b2afcf2d41fb | 86 | lorawan_status_t loraStatus; |
mbed_official | 0:7037ed05f54f | 87 | |
mbed_official | 0:7037ed05f54f | 88 | // Initialize LoRaWAN stack |
mbed_official | 2:dc95ac6d6d4e | 89 | if (lorawan.initialize(&ev_queue) != LORAWAN_STATUS_OK) { |
mbed_official | 0:7037ed05f54f | 90 | printf("\r\n LoRa initialization failed! \r\n"); |
mbed_official | 0:7037ed05f54f | 91 | return -1; |
mbed_official | 0:7037ed05f54f | 92 | } |
mbed_official | 0:7037ed05f54f | 93 | |
mbed_official | 0:7037ed05f54f | 94 | printf("\r\n Mbed LoRaWANStack initialized \r\n"); |
mbed_official | 0:7037ed05f54f | 95 | |
mbed_official | 0:7037ed05f54f | 96 | // prepare application callbacks |
mbed_official | 0:7037ed05f54f | 97 | callbacks.events = mbed::callback(lora_event_handler); |
mbed_official | 2:dc95ac6d6d4e | 98 | lorawan.add_app_callbacks(&callbacks); |
mbed_official | 0:7037ed05f54f | 99 | |
mbed_official | 0:7037ed05f54f | 100 | // Set number of retries in case of CONFIRMED messages |
mbed_official | 2:dc95ac6d6d4e | 101 | if (lorawan.set_confirmed_msg_retries(CONFIRMED_MSG_RETRY_COUNTER) |
mbed_official | 46:a124538e2891 | 102 | != LORAWAN_STATUS_OK) { |
mbed_official | 0:7037ed05f54f | 103 | printf("\r\n set_confirmed_msg_retries failed! \r\n\r\n"); |
mbed_official | 0:7037ed05f54f | 104 | return -1; |
mbed_official | 0:7037ed05f54f | 105 | } |
mbed_official | 0:7037ed05f54f | 106 | |
mbed_official | 0:7037ed05f54f | 107 | printf("\r\n CONFIRMED message retries : %d \r\n", |
mbed_official | 0:7037ed05f54f | 108 | CONFIRMED_MSG_RETRY_COUNTER); |
mbed_official | 0:7037ed05f54f | 109 | |
mbed_official | 0:7037ed05f54f | 110 | // Enable adaptive data rate |
mbed_official | 2:dc95ac6d6d4e | 111 | if (lorawan.enable_adaptive_datarate() != LORAWAN_STATUS_OK) { |
mbed_official | 0:7037ed05f54f | 112 | printf("\r\n enable_adaptive_datarate failed! \r\n"); |
mbed_official | 0:7037ed05f54f | 113 | return -1; |
mbed_official | 0:7037ed05f54f | 114 | } |
mbed_official | 0:7037ed05f54f | 115 | |
mbed_official | 0:7037ed05f54f | 116 | printf("\r\n Adaptive data rate (ADR) - Enabled \r\n"); |
mbed_official | 0:7037ed05f54f | 117 | |
liamcox94 | 48:b2afcf2d41fb | 118 | loraStatus = lorawan.connect(); |
mbed_official | 0:7037ed05f54f | 119 | |
liamcox94 | 48:b2afcf2d41fb | 120 | if (loraStatus == LORAWAN_STATUS_OK || |
liamcox94 | 48:b2afcf2d41fb | 121 | loraStatus == LORAWAN_STATUS_CONNECT_IN_PROGRESS) { |
mbed_official | 0:7037ed05f54f | 122 | } else { |
liamcox94 | 48:b2afcf2d41fb | 123 | printf("\r\n Connection error, code = %d \r\n", loraStatus); |
mbed_official | 0:7037ed05f54f | 124 | return -1; |
mbed_official | 0:7037ed05f54f | 125 | } |
mbed_official | 0:7037ed05f54f | 126 | printf("\r\n Connection - In Progress ...\r\n"); |
mbed_official | 0:7037ed05f54f | 127 | |
mbed_official | 0:7037ed05f54f | 128 | // make your event queue dispatching events forever |
mbed_official | 0:7037ed05f54f | 129 | ev_queue.dispatch_forever(); |
mbed_official | 3:8c7198d1a2a1 | 130 | |
mbed_official | 3:8c7198d1a2a1 | 131 | return 0; |
mbed_official | 0:7037ed05f54f | 132 | } |
mbed_official | 0:7037ed05f54f | 133 | |
mbed_official | 0:7037ed05f54f | 134 | /** |
mbed_official | 0:7037ed05f54f | 135 | * Sends a message to the Network Server |
mbed_official | 0:7037ed05f54f | 136 | */ |
liamcox94 | 48:b2afcf2d41fb | 137 | static void send_message() { |
liamcox94 | 48:b2afcf2d41fb | 138 | uint16_t packet_cont; |
liamcox94 | 48:b2afcf2d41fb | 139 | int16_t loraStatus; |
liamcox94 | 49:3b27f622a798 | 140 | uint8_t hash_content; |
liamcox94 | 49:3b27f622a798 | 141 | uint8_t sensor_val; |
liamcox94 | 48:b2afcf2d41fb | 142 | unsigned char output[32]; |
liamcox94 | 49:3b27f622a798 | 143 | |
liamcox94 | 49:3b27f622a798 | 144 | //Begin sensor |
liamcox94 | 49:3b27f622a798 | 145 | if (ds1820.begin()) { |
liamcox94 | 49:3b27f622a798 | 146 | ds1820.startConversion(); |
liamcox94 | 49:3b27f622a798 | 147 | sensor_val = ds1820.read(); |
liamcox94 | 49:3b27f622a798 | 148 | ds1820.startConversion(); |
liamcox94 | 49:3b27f622a798 | 149 | } else { |
liamcox94 | 49:3b27f622a798 | 150 | printf("\r\n No sensor found \r\n"); |
liamcox94 | 49:3b27f622a798 | 151 | return; |
liamcox94 | 49:3b27f622a798 | 152 | } |
mbed_official | 0:7037ed05f54f | 153 | |
liamcox94 | 49:3b27f622a798 | 154 | hash_content = sensor_val; //Assign sensor value to hash_content |
liamcox94 | 49:3b27f622a798 | 155 | printf("\r\n %d sensor value \r\n", hash_content); //print to check value |
liamcox94 | 49:3b27f622a798 | 156 | char hash_str[] = ""; //create new char array |
liamcox94 | 49:3b27f622a798 | 157 | sprintf(hash_str, "%d", hash_content); //put value into new char array |
liamcox94 | 48:b2afcf2d41fb | 158 | |
liamcox94 | 49:3b27f622a798 | 159 | static const unsigned char * hash_buffer = (const unsigned char * ) hash_str; //cast char array to const unsigned char |
liamcox94 | 49:3b27f622a798 | 160 | static const size_t hash_len = strlen(hash_str); //get size of message |
liamcox94 | 48:b2afcf2d41fb | 161 | |
liamcox94 | 49:3b27f622a798 | 162 | |
liamcox94 | 49:3b27f622a798 | 163 | mbedtls_sha256(hash_buffer, hash_len, output, 0); //hash message |
mbed_official | 0:7037ed05f54f | 164 | |
liamcox94 | 49:3b27f622a798 | 165 | const char * c = (const char * ) output; //put hashed message into char |
mbed_official | 0:7037ed05f54f | 166 | |
liamcox94 | 49:3b27f622a798 | 167 | packet_cont = sprintf((char * ) tx_buffer, "%d%s",hash_content , c); //build message with original value + hashed message |
liamcox94 | 49:3b27f622a798 | 168 | |
liamcox94 | 49:3b27f622a798 | 169 | loraStatus = lorawan.send(MBED_CONF_LORA_APP_PORT, tx_buffer, packet_cont, //send message |
liamcox94 | 48:b2afcf2d41fb | 170 | MSG_UNCONFIRMED_FLAG); |
liamcox94 | 48:b2afcf2d41fb | 171 | |
liamcox94 | 49:3b27f622a798 | 172 | if (loraStatus < 0) { //perform checks to confirm message is sent |
liamcox94 | 48:b2afcf2d41fb | 173 | loraStatus == LORAWAN_STATUS_WOULD_BLOCK ? printf("send - WOULD BLOCK\r\n") : |
liamcox94 | 49:3b27f622a798 | 174 | printf("\r\n send() - Error code %d \r\n", loraStatus); |
liamcox94 | 48:b2afcf2d41fb | 175 | return; |
liamcox94 | 48:b2afcf2d41fb | 176 | } |
mbed_official | 0:7037ed05f54f | 177 | |
liamcox94 | 49:3b27f622a798 | 178 | printf("\r\n %d bytes scheduled for transmission \r\n", loraStatus); //print if successful and clear tx buffer |
liamcox94 | 48:b2afcf2d41fb | 179 | memset(tx_buffer, 0, sizeof(tx_buffer)); |
mbed_official | 0:7037ed05f54f | 180 | } |
mbed_official | 0:7037ed05f54f | 181 | /** |
mbed_official | 0:7037ed05f54f | 182 | * Receive a message from the Network Server |
mbed_official | 0:7037ed05f54f | 183 | */ |
mbed_official | 0:7037ed05f54f | 184 | static void receive_message() |
mbed_official | 0:7037ed05f54f | 185 | { |
mbed_official | 47:b6d132f1079f | 186 | uint8_t port; |
mbed_official | 47:b6d132f1079f | 187 | int flags; |
mbed_official | 47:b6d132f1079f | 188 | int16_t retcode = lorawan.receive(rx_buffer, sizeof(rx_buffer), port, flags); |
mbed_official | 0:7037ed05f54f | 189 | |
mbed_official | 0:7037ed05f54f | 190 | if (retcode < 0) { |
mbed_official | 0:7037ed05f54f | 191 | printf("\r\n receive() - Error code %d \r\n", retcode); |
mbed_official | 0:7037ed05f54f | 192 | return; |
mbed_official | 0:7037ed05f54f | 193 | } |
mbed_official | 0:7037ed05f54f | 194 | |
mbed_official | 47:b6d132f1079f | 195 | printf(" RX Data on port %u (%d bytes): ", port, retcode); |
mbed_official | 0:7037ed05f54f | 196 | for (uint8_t i = 0; i < retcode; i++) { |
mbed_official | 47:b6d132f1079f | 197 | printf("%02x ", rx_buffer[i]); |
mbed_official | 0:7037ed05f54f | 198 | } |
mbed_official | 47:b6d132f1079f | 199 | printf("\r\n"); |
mbed_official | 47:b6d132f1079f | 200 | |
mbed_official | 12:5015dfead3f2 | 201 | memset(rx_buffer, 0, sizeof(rx_buffer)); |
mbed_official | 0:7037ed05f54f | 202 | } |
mbed_official | 0:7037ed05f54f | 203 | |
mbed_official | 0:7037ed05f54f | 204 | /** |
mbed_official | 0:7037ed05f54f | 205 | * Event handler |
mbed_official | 0:7037ed05f54f | 206 | */ |
mbed_official | 0:7037ed05f54f | 207 | static void lora_event_handler(lorawan_event_t event) |
mbed_official | 0:7037ed05f54f | 208 | { |
mbed_official | 0:7037ed05f54f | 209 | switch (event) { |
mbed_official | 0:7037ed05f54f | 210 | case CONNECTED: |
mbed_official | 0:7037ed05f54f | 211 | printf("\r\n Connection - Successful \r\n"); |
mbed_official | 0:7037ed05f54f | 212 | if (MBED_CONF_LORA_DUTY_CYCLE_ON) { |
mbed_official | 0:7037ed05f54f | 213 | send_message(); |
mbed_official | 0:7037ed05f54f | 214 | } else { |
mbed_official | 0:7037ed05f54f | 215 | ev_queue.call_every(TX_TIMER, send_message); |
mbed_official | 0:7037ed05f54f | 216 | } |
mbed_official | 0:7037ed05f54f | 217 | |
mbed_official | 0:7037ed05f54f | 218 | break; |
mbed_official | 0:7037ed05f54f | 219 | case DISCONNECTED: |
mbed_official | 0:7037ed05f54f | 220 | ev_queue.break_dispatch(); |
mbed_official | 0:7037ed05f54f | 221 | printf("\r\n Disconnected Successfully \r\n"); |
mbed_official | 0:7037ed05f54f | 222 | break; |
mbed_official | 0:7037ed05f54f | 223 | case TX_DONE: |
mbed_official | 0:7037ed05f54f | 224 | printf("\r\n Message Sent to Network Server \r\n"); |
mbed_official | 0:7037ed05f54f | 225 | if (MBED_CONF_LORA_DUTY_CYCLE_ON) { |
mbed_official | 0:7037ed05f54f | 226 | send_message(); |
mbed_official | 0:7037ed05f54f | 227 | } |
mbed_official | 0:7037ed05f54f | 228 | break; |
mbed_official | 0:7037ed05f54f | 229 | case TX_TIMEOUT: |
mbed_official | 0:7037ed05f54f | 230 | case TX_ERROR: |
mbed_official | 0:7037ed05f54f | 231 | case TX_CRYPTO_ERROR: |
mbed_official | 0:7037ed05f54f | 232 | case TX_SCHEDULING_ERROR: |
mbed_official | 0:7037ed05f54f | 233 | printf("\r\n Transmission Error - EventCode = %d \r\n", event); |
mbed_official | 0:7037ed05f54f | 234 | // try again |
mbed_official | 0:7037ed05f54f | 235 | if (MBED_CONF_LORA_DUTY_CYCLE_ON) { |
mbed_official | 0:7037ed05f54f | 236 | send_message(); |
mbed_official | 0:7037ed05f54f | 237 | } |
mbed_official | 0:7037ed05f54f | 238 | break; |
mbed_official | 0:7037ed05f54f | 239 | case RX_DONE: |
mbed_official | 0:7037ed05f54f | 240 | printf("\r\n Received message from Network Server \r\n"); |
mbed_official | 0:7037ed05f54f | 241 | receive_message(); |
mbed_official | 0:7037ed05f54f | 242 | break; |
mbed_official | 0:7037ed05f54f | 243 | case RX_TIMEOUT: |
mbed_official | 0:7037ed05f54f | 244 | case RX_ERROR: |
mbed_official | 0:7037ed05f54f | 245 | printf("\r\n Error in reception - Code = %d \r\n", event); |
mbed_official | 0:7037ed05f54f | 246 | break; |
mbed_official | 0:7037ed05f54f | 247 | case JOIN_FAILURE: |
mbed_official | 0:7037ed05f54f | 248 | printf("\r\n OTAA Failed - Check Keys \r\n"); |
mbed_official | 0:7037ed05f54f | 249 | break; |
mbed_official | 26:f07f5febf97f | 250 | case UPLINK_REQUIRED: |
mbed_official | 26:f07f5febf97f | 251 | printf("\r\n Uplink required by NS \r\n"); |
mbed_official | 26:f07f5febf97f | 252 | if (MBED_CONF_LORA_DUTY_CYCLE_ON) { |
mbed_official | 26:f07f5febf97f | 253 | send_message(); |
mbed_official | 26:f07f5febf97f | 254 | } |
mbed_official | 26:f07f5febf97f | 255 | break; |
mbed_official | 0:7037ed05f54f | 256 | default: |
mbed_official | 0:7037ed05f54f | 257 | MBED_ASSERT("Unknown Event"); |
mbed_official | 0:7037ed05f54f | 258 | } |
mbed_official | 0:7037ed05f54f | 259 | } |
mbed_official | 0:7037ed05f54f | 260 | |
liamcox94 | 48:b2afcf2d41fb | 261 | // EOF |