Diff: NTPClient.h

Revision:

0:a56239ae90c2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NTPClient.h	Mon Sep 25 19:02:40 2017 +0000
@@ -0,0 +1,103 @@
+/* NTPClient.h */
+/* Copyright (C) 2012 mbed.org, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef NTPCLIENT_H_
+#define NTPCLIENT_H_
+
+#include <cstdint>
+#include "EthernetInterface.h"
+#include "NetworkStack.h"
+#include "UDPSocket.h"
+#include <inet.h>
+
+using std::uint8_t;
+using std::uint16_t;
+using std::uint32_t;
+
+#define NTP_DEFAULT_PORT 123
+#define NTP_DEFAULT_TIMEOUT 3
+#define NTP_CLIENT_PORT 0 //Random port
+#define NTP_TIMESTAMP_DELTA 2208988800ull //Diff btw a UNIX timestamp (Starting Jan, 1st 1970) and a NTP timestamp (Starting Jan, 1st 1900)
+
+///NTP client results
+enum NTPResult
+{
+  NTP_DNS = -1, ///<Could not resolve name
+  NTP_PRTCL = -2, ///<Protocol error
+  NTP_TIMEOUT = -3, ///<Connection timeout
+  NTP_CONN = -4, ///<Connection error
+  NTP_OK = 1, ///<Success
+  NTP_WAIT = 0
+};
+
+/** NTP Client to update the mbed's RTC using a remote time server
+*
+*/
+class NTPClient
+{
+public:
+    NTPClient();
+    NTPResult setTime(EthernetInterface *stack, const char* host, uint16_t port = NTP_DEFAULT_PORT, uint32_t timeout = NTP_DEFAULT_TIMEOUT); //Blocking
+    int update();
+
+private:
+    void process_result();
+    void reset();
+    
+    struct NTPPacket //See RFC 4330 for Simple NTP
+    {
+        //WARN: We are in LE! Network is BE!
+        //LSb first
+        unsigned mode : 3;
+        unsigned vn : 3;
+        unsigned li : 2;
+        
+        uint8_t stratum;
+        uint8_t poll;
+        uint8_t precision;
+        //32 bits header
+        
+        uint32_t rootDelay;
+        uint32_t rootDispersion;
+        uint32_t refId;
+        
+        uint32_t refTm_s;
+        uint32_t refTm_f;
+        uint32_t origTm_s;
+        uint32_t origTm_f;
+        uint32_t rxTm_s;
+        uint32_t rxTm_f;
+        uint32_t txTm_s;
+        uint32_t txTm_f;
+    } __attribute__ ((packed));
+    
+    struct NTPPacket pkt;
+    UDPSocket m_sock;
+    bool mQuerySent;
+    bool mResponseReceived;
+    bool mConversationComplete;
+    int mStartTime;
+    int mTimeout;
+    SocketAddress* outEndpoint;
+    SocketAddress* inEndpoint;
+};
+
+
+#endif
+