Diff: main.cpp

Revision:

0:d0f7d306a900

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri May 25 12:25:32 2018 +0000
@@ -0,0 +1,38 @@
+#include "mbed.h"
+#include "nsapi_types.h"
+#include "EthernetInterface.h"
+#include "SocketAddress.h"
+#include "Semaphore.h"
+
+rtos::Semaphore callback_semaphore;
+SocketAddress address;
+nsapi_error_t result;
+
+// Callback for asynchronous host name resolution
+void hostbyname_callback(nsapi_error_t res, SocketAddress *addr)
+{
+    // Store result and release semaphore
+    result = res;
+    address = *addr;
+    callback_semaphore.release();
+}
+
+int main()
+{
+    // Initialise network interface
+    EthernetInterface eth;
+    eth.connect();
+
+    // Initiate asynchronous DNS host name resolution
+    eth.gethostbyname_async("www.mbed.com", hostbyname_callback);
+
+    // Wait for callback semaphore
+    callback_semaphore.wait();
+
+    // Print result
+    printf("Result %s, Address %s\r\n", result == NSAPI_ERROR_OK ? "OK" : "FAIL",
+        result == NSAPI_ERROR_OK ? address.get_ip_address() : "NONE");
+
+    // Disconnect network interface
+    eth.disconnect();
+}