uint32_t arm_random_seed_get(void)
{
uint32_t result = 0;
#ifdef MBEDTLS_ENTROPY_HARDWARE_ALT
#if defined(MBEDTLS_PLATFORM_C)
mbedtls_platform_setup(NULL);
#endif /* MBEDTLS_PLATFORM_C */
/* Grab a seed from a function we provide for mbedtls */
size_t len;
mbedtls_hardware_poll(NULL, (uint8_t *) &result, sizeof result, &len);
#if defined(MBEDTLS_PLATFORM_C)
mbedtls_platform_teardown(NULL);
#endif /* MBEDTLS_PLATFORM_C */
#endif
return result;
}
static int mbedtls_entropy_source_self_test_gather(unsigned char *buf, size_t buf_len)
{
int ret = 0;
size_t entropy_len = 0;
size_t olen = 0;
size_t attempts = buf_len;
while (attempts > 0 && entropy_len < buf_len) {
if ((ret = mbedtls_hardware_poll(NULL, buf + entropy_len, buf_len - entropy_len, &olen)) != 0) {
return (ret);
}
entropy_len += olen;
attempts--;
}
if (entropy_len < buf_len) {
ret = 1;
}
return (ret);
}
// Entry point to the program
int main() {
unsigned int seed;
size_t len;
#ifdef MBEDTLS_ENTROPY_HARDWARE_ALT
// Used to randomize source port
mbedtls_hardware_poll(NULL, (unsigned char *) &seed, sizeof seed, &len);
#elif defined MBEDTLS_TEST_NULL_ENTROPY
#warning "mbedTLS security feature is disabled. Connection will not be secure !! Implement proper hardware entropy for your selected hardware."
// Used to randomize source port
mbedtls_null_entropy_poll( NULL,(unsigned char *) &seed, sizeof seed, &len);
#else
#error "This hardware does not have entropy, endpoint will not register to Connector.\
You need to enable NULL ENTROPY for your application, but if this configuration change is made then no security is offered by mbed TLS.\
Add MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES and MBEDTLS_TEST_NULL_ENTROPY in mbed_app.json macros to register your endpoint."
#endif
srand(seed);
red_led = LED_OFF;
blue_led = LED_OFF;
status_ticker.attach_us(blinky, 250000);
// Keep track of the main thread
mainThread = osThreadGetId();
printf("\nStarting mbed Client example in ");
#if defined (MESH) || (MBED_CONF_LWIP_IPV6_ENABLED==true)
printf("IPv6 mode\n");
#else
printf("IPv4 mode\n");
#endif
mbed_trace_init();
NetworkInterface* network = easy_connect(true);
if(network == NULL) {
printf("\nConnection to Network Failed - exiting application...\n");
return -1;
}
// we create our button and LED resources
ButtonResource button_resource;
LedResource led_resource;
BigPayloadResource big_payload_resource;
#ifdef TARGET_K64F
// On press of SW3 button on K64F board, example application
// will call unregister API towards mbed Device Connector
//unreg_button.fall(&mbed_client,&MbedClient::test_unregister);
unreg_button.fall(&unregister);
// Observation Button (SW2) press will send update of endpoint resource values to connector
obs_button.fall(&button_clicked);
#else
// Send update of endpoint resource values to connector every 15 seconds periodically
timer.attach(&button_clicked, 15.0);
#endif
// Create endpoint interface to manage register and unregister
mbed_client.create_interface(MBED_SERVER_ADDRESS, network);
// Create Objects of varying types, see simpleclient.h for more details on implementation.
M2MSecurity* register_object = mbed_client.create_register_object(); // server object specifying connector info
M2MDevice* device_object = mbed_client.create_device_object(); // device resources object
// Create list of Objects to register
M2MObjectList object_list;
// Add objects to list
object_list.push_back(device_object);
object_list.push_back(button_resource.get_object());
object_list.push_back(led_resource.get_object());
object_list.push_back(big_payload_resource.get_object());
// Set endpoint registration object
mbed_client.set_register_object(register_object);
// Register with mbed Device Connector
mbed_client.test_register(register_object, object_list);
registered = true;
while (true) {
updates.wait(25000);
if(registered) {
if(!clicked) {
mbed_client.test_update_register();
}
}else {
break;
}
if(clicked) {
clicked = false;
button_resource.handle_button_click();
}
}
mbed_client.test_unregister();
status_ticker.detach();
}
