Hiroshi Yamaguchi / Station

Station API

Dependents:   GMCStation

NTPClient.h@1:a22e390c70b3, 2011-12-12 (annotated)

Committer:
yamaguch
Date:
Mon Dec 12 02:33:21 2011 +0000
Revision:
1:a22e390c70b3
Child:
2:a9d1a9c92927
0.1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yamaguch 1:a22e390c70b3 1 /*
yamaguch 1:a22e390c70b3 2 Copyright (c) 2011, Senio Networks, Inc.
yamaguch 1:a22e390c70b3 3
yamaguch 1:a22e390c70b3 4 Permission is hereby granted, free of charge, to any person obtaining a copy
yamaguch 1:a22e390c70b3 5 of this software and associated documentation files (the "Software"), to deal
yamaguch 1:a22e390c70b3 6 in the Software without restriction, including without limitation the rights
yamaguch 1:a22e390c70b3 7 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
yamaguch 1:a22e390c70b3 8 copies of the Software, and to permit persons to whom the Software is
yamaguch 1:a22e390c70b3 9 furnished to do so, subject to the following conditions:
yamaguch 1:a22e390c70b3 10
yamaguch 1:a22e390c70b3 11 The above copyright notice and this permission notice shall be included in
yamaguch 1:a22e390c70b3 12 all copies or substantial portions of the Software.
yamaguch 1:a22e390c70b3 13
yamaguch 1:a22e390c70b3 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
yamaguch 1:a22e390c70b3 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
yamaguch 1:a22e390c70b3 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
yamaguch 1:a22e390c70b3 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
yamaguch 1:a22e390c70b3 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
yamaguch 1:a22e390c70b3 19 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
yamaguch 1:a22e390c70b3 20 THE SOFTWARE.
yamaguch 1:a22e390c70b3 21 */
yamaguch 1:a22e390c70b3 22
yamaguch 1:a22e390c70b3 23 #include "SimpleSocket.h"
yamaguch 1:a22e390c70b3 24
yamaguch 1:a22e390c70b3 25 class NTPClient {
yamaguch 1:a22e390c70b3 26 public:
yamaguch 1:a22e390c70b3 27 NTPClient(char *server = "pool.ntp.org", float timeout = 3.0)
yamaguch 1:a22e390c70b3 28 : server(server), timeout(timeout) {}
yamaguch 1:a22e390c70b3 29
yamaguch 1:a22e390c70b3 30 bool setTime() {
yamaguch 1:a22e390c70b3 31 Timer timer;
yamaguch 1:a22e390c70b3 32 timer.start();
yamaguch 1:a22e390c70b3 33 while (timer.read() < timeout) {
yamaguch 1:a22e390c70b3 34 DatagramSocket datagram;
yamaguch 1:a22e390c70b3 35 char buf[48] = {0x23}; // 00100011 LI(0), Version(4), Mode(3: Client)
yamaguch 1:a22e390c70b3 36 datagram.write(buf, sizeof(buf));
yamaguch 1:a22e390c70b3 37 datagram.send(server, 123);
yamaguch 1:a22e390c70b3 38
yamaguch 1:a22e390c70b3 39 if (datagram.receive(0, timeout) > 0) {
yamaguch 1:a22e390c70b3 40 if (datagram.read(buf, sizeof(buf))) {
yamaguch 1:a22e390c70b3 41 unsigned long seconds = 0;
yamaguch 1:a22e390c70b3 42 for (int i = 40; i <= 43; i++)
yamaguch 1:a22e390c70b3 43 seconds = (seconds << 8) | buf[i];
yamaguch 1:a22e390c70b3 44 set_time(time_t(seconds - 2208988800ULL));
yamaguch 1:a22e390c70b3 45 return true;
yamaguch 1:a22e390c70b3 46 }
yamaguch 1:a22e390c70b3 47 }
yamaguch 1:a22e390c70b3 48 }
yamaguch 1:a22e390c70b3 49
yamaguch 1:a22e390c70b3 50 return false;
yamaguch 1:a22e390c70b3 51 }
yamaguch 1:a22e390c70b3 52
yamaguch 1:a22e390c70b3 53 private:
yamaguch 1:a22e390c70b3 54 char *server;
yamaguch 1:a22e390c70b3 55 float timeout;
yamaguch 1:a22e390c70b3 56 };