NTP Client for the mbed networking libraries. The small change to this version is that there can be only one cause for the return value zero.
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NTPClient.h
- Committer:
- WiredHome
- Date:
- 2015-11-26
- Revision:
- 8:802277794640
- Parent:
- 6:bef14adc58c4
- Child:
- 9:2f607bafc29e
File content as of revision 8:802277794640:
/* 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 <cstdint> using std::uint8_t; using std::uint16_t; using std::uint32_t; #include "UDPSocket.h" #define NTP_DEFAULT_PORT 123 #define NTP_DEFAULT_TIMEOUT 4000 ///NTP client results enum NTPResult { NTP_OK = 0, ///<Success NTP_DNS, ///<Could not resolve name NTP_PRTCL, ///<Protocol error NTP_TIMEOUT, ///<Connection timeout NTP_CONN, ///<Connection error }; /** 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[in] host NTP server IPv4 address or hostname (will be resolved via DNS) @param[in] port port to use; defaults to 123 @param[in] 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: 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)); UDPSocket m_sock; }; #endif /* NTPCLIENT_H_ */