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/* 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.
*/
/** \file
NTP Client header file
*/
#ifndef NTPCLIENT_H_
#define NTPCLIENT_H_
#include "UDPSocket.h"
#define NTP_DEFAULT_PORT 123
#define NTP_DEFAULT_TIMEOUT 4000
///NTP client results
enum NTPResult
{
NTP_DNS, ///<Could not resolve name
NTP_PRTCL, ///<Protocol error
NTP_TIMEOUT, ///<Connection timeout
NTP_CONN, ///<Connection error
NTP_OK = 0, ///<Success
};
/** NTP Client to update the mbed's RTC using a remote time server
*
*/
class NTPClient
{
public:
/**
Instantiate the NTP client
*/
NTPClient();
/**Get current time (blocking)
Update the time using the server host
Blocks until completion
@param host NTP server IPv4 address or hostname (will be resolved via DNS)
@param port port to use; defaults to 123
@param timeout waiting timeout in ms (osWaitForever for blocking function, not recommended)
@return 0 on success, NTP error code (<0) on failure
*/
NTPResult setTime(const char* host, uint16_t port = NTP_DEFAULT_PORT, uint32_t timeout = NTP_DEFAULT_TIMEOUT); //Blocking
private:
#if defined (__ICCARM__)
#pragma pack()
#endif
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;
#if defined (__ICCARM__)
};
#else
} __attribute__ ((packed));
#endif
UDPSocket m_sock;
};
#endif /* NTPCLIENT_H_ */
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