Station API
Diff: NTPClient.h
- Revision:
- 1:a22e390c70b3
- Child:
- 2:a9d1a9c92927
diff -r d81f611c59ec -r a22e390c70b3 NTPClient.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/NTPClient.h Mon Dec 12 02:33:21 2011 +0000 @@ -0,0 +1,56 @@ +/* +Copyright (c) 2011, Senio Networks, Inc. + +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. +*/ + +#include "SimpleSocket.h" + +class NTPClient { +public: + NTPClient(char *server = "pool.ntp.org", float timeout = 3.0) + : server(server), timeout(timeout) {} + + bool setTime() { + Timer timer; + timer.start(); + while (timer.read() < timeout) { + DatagramSocket datagram; + char buf[48] = {0x23}; // 00100011 LI(0), Version(4), Mode(3: Client) + datagram.write(buf, sizeof(buf)); + datagram.send(server, 123); + + if (datagram.receive(0, timeout) > 0) { + if (datagram.read(buf, sizeof(buf))) { + unsigned long seconds = 0; + for (int i = 40; i <= 43; i++) + seconds = (seconds << 8) | buf[i]; + set_time(time_t(seconds - 2208988800ULL)); + return true; + } + } + } + + return false; + } + +private: + char *server; + float timeout; +}; \ No newline at end of file