Add NTP Local Server Library

lib/ArduinoNTPd/NTPPacket.cpp

@@ -0,0 +1,39 @@
+/*
+ * File: NTPPacket.cpp
+ * Description:
+ *   NTP packet representation.
+ * Author: Mooneer Salem <mooneer@gmail.com>
+ * License: New BSD License
+ */
+ 
+#include "NTPPacket.h"
+
+void NtpPacket::swapEndian()
+{
+    reverseBytes_(&rootDelay);
+    reverseBytes_(&rootDispersion);
+    reverseBytes_(&referenceTimestampSeconds);
+    reverseBytes_(&referenceTimestampFraction);
+    reverseBytes_(&originTimestampSeconds);
+    reverseBytes_(&originTimestampFraction);
+    reverseBytes_(&receiveTimestampSeconds);
+    reverseBytes_(&receiveTimestampFraction);
+    reverseBytes_(&transmitTimestampSeconds);
+    reverseBytes_(&transmitTimestampFraction);
+}
+
+void NtpPacket::reverseBytes_(uint32_t *number)
+{
+    char buf[4];
+    char *numberAsChar = (char*)number;
+    
+    buf[0] = numberAsChar[3];
+    buf[1] = numberAsChar[2];
+    buf[2] = numberAsChar[1];
+    buf[3] = numberAsChar[0];
+    
+    numberAsChar[0] = buf[0];
+    numberAsChar[1] = buf[1];
+    numberAsChar[2] = buf[2];
+    numberAsChar[3] = buf[3];
+}