Hiroshi Yamaguchi / Station

Station API

Dependents:   GMCStation

NTPClient.h@5:3df13e2e928e, 2011-12-22 (annotated)

Committer:
yamaguch
Date:
Thu Dec 22 02:08:01 2011 +0000
Revision:
5:3df13e2e928e
Parent:
2:a9d1a9c92927 
added #include \"Utils.h\"

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 5:3df13e2e928e 24 #include "Utils.h"
yamaguch 1:a22e390c70b3 25
yamaguch 2:a9d1a9c92927 26 /**
yamaguch 2:a9d1a9c92927 27 * NTP Client interface to adjust RTC
yamaguch 2:a9d1a9c92927 28 */
yamaguch 1:a22e390c70b3 29 class NTPClient {
yamaguch 1:a22e390c70b3 30 public:
yamaguch 2:a9d1a9c92927 31 /**
yamaguch 2:a9d1a9c92927 32 * creates an NTPClient object
yamaguch 2:a9d1a9c92927 33 *
yamaguch 2:a9d1a9c92927 34 * @param server NTP server host name
yamaguch 2:a9d1a9c92927 35 * @param timeout max wait time for connection
yamaguch 2:a9d1a9c92927 36 */
yamaguch 2:a9d1a9c92927 37 NTPClient(char *server = "pool.ntp.org", float timeout = 3.0) : timeout(timeout) {
yamaguch 2:a9d1a9c92927 38 strncpy(this->server, server, sizeof(this->server));
yamaguch 2:a9d1a9c92927 39 }
yamaguch 2:a9d1a9c92927 40
yamaguch 2:a9d1a9c92927 41 /**
yamaguch 2:a9d1a9c92927 42 * creates an NTPClient object from a config file
yamaguch 2:a9d1a9c92927 43 *
yamaguch 2:a9d1a9c92927 44 * @param filename name for the configuration file containing server host name and timeout
yamaguch 2:a9d1a9c92927 45 * @param verbose if true display debug info
yamaguch 2:a9d1a9c92927 46 */
yamaguch 2:a9d1a9c92927 47 static NTPClient create(char *filename, bool verbose = false) {
yamaguch 2:a9d1a9c92927 48 char server[32] = "pool.ntp.org";
yamaguch 2:a9d1a9c92927 49 float timeout = 3.0;
yamaguch 2:a9d1a9c92927 50
yamaguch 2:a9d1a9c92927 51 if (filename) {
yamaguch 2:a9d1a9c92927 52 char path[32];
yamaguch 2:a9d1a9c92927 53 LocalFileSystem local("local");
yamaguch 2:a9d1a9c92927 54 sprintf(path, "/local/%s", filename);
yamaguch 2:a9d1a9c92927 55 if (FILE *fp = fopen(path, "r")) {
yamaguch 2:a9d1a9c92927 56 Utils::fgetValues(fp, "ntp-server:%s", server);
yamaguch 2:a9d1a9c92927 57 Utils::fgetValues(fp, "ntp-timeout:%f", &timeout);
yamaguch 2:a9d1a9c92927 58 fclose(fp);
yamaguch 2:a9d1a9c92927 59 if (verbose) {
yamaguch 2:a9d1a9c92927 60 printf("ntp-server:%s\n", server);
yamaguch 2:a9d1a9c92927 61 printf("ntp-timeout:%2.1f\n", timeout);
yamaguch 2:a9d1a9c92927 62 }
yamaguch 2:a9d1a9c92927 63 }
yamaguch 2:a9d1a9c92927 64 }
yamaguch 2:a9d1a9c92927 65
yamaguch 2:a9d1a9c92927 66 return NTPClient(server, timeout);
yamaguch 2:a9d1a9c92927 67 }
yamaguch 2:a9d1a9c92927 68
yamaguch 2:a9d1a9c92927 69 /**
yamaguch 2:a9d1a9c92927 70 * adjusts RTC
yamaguch 2:a9d1a9c92927 71 *
yamaguch 2:a9d1a9c92927 72 * @returns true if succeeded
yamaguch 2:a9d1a9c92927 73 */
yamaguch 1:a22e390c70b3 74 bool setTime() {
yamaguch 1:a22e390c70b3 75 Timer timer;
yamaguch 1:a22e390c70b3 76 timer.start();
yamaguch 1:a22e390c70b3 77 while (timer.read() < timeout) {
yamaguch 1:a22e390c70b3 78 DatagramSocket datagram;
yamaguch 1:a22e390c70b3 79 char buf[48] = {0x23}; // 00100011 LI(0), Version(4), Mode(3: Client)
yamaguch 1:a22e390c70b3 80 datagram.write(buf, sizeof(buf));
yamaguch 1:a22e390c70b3 81 datagram.send(server, 123);
yamaguch 1:a22e390c70b3 82
yamaguch 1:a22e390c70b3 83 if (datagram.receive(0, timeout) > 0) {
yamaguch 1:a22e390c70b3 84 if (datagram.read(buf, sizeof(buf))) {
yamaguch 1:a22e390c70b3 85 unsigned long seconds = 0;
yamaguch 1:a22e390c70b3 86 for (int i = 40; i <= 43; i++)
yamaguch 1:a22e390c70b3 87 seconds = (seconds << 8) | buf[i];
yamaguch 1:a22e390c70b3 88 set_time(time_t(seconds - 2208988800ULL));
yamaguch 1:a22e390c70b3 89 return true;
yamaguch 1:a22e390c70b3 90 }
yamaguch 1:a22e390c70b3 91 }
yamaguch 1:a22e390c70b3 92 }
yamaguch 1:a22e390c70b3 93
yamaguch 1:a22e390c70b3 94 return false;
yamaguch 1:a22e390c70b3 95 }
yamaguch 1:a22e390c70b3 96
yamaguch 1:a22e390c70b3 97 private:
yamaguch 2:a9d1a9c92927 98 char server[32];
yamaguch 1:a22e390c70b3 99 float timeout;
yamaguch 1:a22e390c70b3 100 };