Hiroshi Yamaguchi
Station API
NTPClient.h@2:a9d1a9c92927, 2011-12-12 (annotated)
- Committer:
- yamaguch
- Date:
- Mon Dec 12 11:41:24 2011 +0000
- Revision:
- 2:a9d1a9c92927
- Parent:
- 1:a22e390c70b3
- Child:
- 5:3df13e2e928e
Who changed what in which revision?
| User | Revision | Line number | New 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 | 2:a9d1a9c92927 | 25 | /** |
| yamaguch | 2:a9d1a9c92927 | 26 | * NTP Client interface to adjust RTC |
| yamaguch | 2:a9d1a9c92927 | 27 | */ |
| yamaguch | 1:a22e390c70b3 | 28 | class NTPClient { |
| yamaguch | 1:a22e390c70b3 | 29 | public: |
| yamaguch | 2:a9d1a9c92927 | 30 | /** |
| yamaguch | 2:a9d1a9c92927 | 31 | * creates an NTPClient object |
| yamaguch | 2:a9d1a9c92927 | 32 | * |
| yamaguch | 2:a9d1a9c92927 | 33 | * @param server NTP server host name |
| yamaguch | 2:a9d1a9c92927 | 34 | * @param timeout max wait time for connection |
| yamaguch | 2:a9d1a9c92927 | 35 | */ |
| yamaguch | 2:a9d1a9c92927 | 36 | NTPClient(char *server = "pool.ntp.org", float timeout = 3.0) : timeout(timeout) { |
| yamaguch | 2:a9d1a9c92927 | 37 | strncpy(this->server, server, sizeof(this->server)); |
| yamaguch | 2:a9d1a9c92927 | 38 | } |
| yamaguch | 2:a9d1a9c92927 | 39 | |
| yamaguch | 2:a9d1a9c92927 | 40 | /** |
| yamaguch | 2:a9d1a9c92927 | 41 | * creates an NTPClient object from a config file |
| yamaguch | 2:a9d1a9c92927 | 42 | * |
| yamaguch | 2:a9d1a9c92927 | 43 | * @param filename name for the configuration file containing server host name and timeout |
| yamaguch | 2:a9d1a9c92927 | 44 | * @param verbose if true display debug info |
| yamaguch | 2:a9d1a9c92927 | 45 | */ |
| yamaguch | 2:a9d1a9c92927 | 46 | static NTPClient create(char *filename, bool verbose = false) { |
| yamaguch | 2:a9d1a9c92927 | 47 | char server[32] = "pool.ntp.org"; |
| yamaguch | 2:a9d1a9c92927 | 48 | float timeout = 3.0; |
| yamaguch | 2:a9d1a9c92927 | 49 | |
| yamaguch | 2:a9d1a9c92927 | 50 | if (filename) { |
| yamaguch | 2:a9d1a9c92927 | 51 | char path[32]; |
| yamaguch | 2:a9d1a9c92927 | 52 | LocalFileSystem local("local"); |
| yamaguch | 2:a9d1a9c92927 | 53 | sprintf(path, "/local/%s", filename); |
| yamaguch | 2:a9d1a9c92927 | 54 | if (FILE *fp = fopen(path, "r")) { |
| yamaguch | 2:a9d1a9c92927 | 55 | Utils::fgetValues(fp, "ntp-server:%s", server); |
| yamaguch | 2:a9d1a9c92927 | 56 | Utils::fgetValues(fp, "ntp-timeout:%f", &timeout); |
| yamaguch | 2:a9d1a9c92927 | 57 | fclose(fp); |
| yamaguch | 2:a9d1a9c92927 | 58 | if (verbose) { |
| yamaguch | 2:a9d1a9c92927 | 59 | printf("ntp-server:%s\n", server); |
| yamaguch | 2:a9d1a9c92927 | 60 | printf("ntp-timeout:%2.1f\n", timeout); |
| yamaguch | 2:a9d1a9c92927 | 61 | } |
| yamaguch | 2:a9d1a9c92927 | 62 | } |
| yamaguch | 2:a9d1a9c92927 | 63 | } |
| yamaguch | 2:a9d1a9c92927 | 64 | |
| yamaguch | 2:a9d1a9c92927 | 65 | return NTPClient(server, timeout); |
| yamaguch | 2:a9d1a9c92927 | 66 | } |
| yamaguch | 2:a9d1a9c92927 | 67 | |
| yamaguch | 2:a9d1a9c92927 | 68 | /** |
| yamaguch | 2:a9d1a9c92927 | 69 | * adjusts RTC |
| yamaguch | 2:a9d1a9c92927 | 70 | * |
| yamaguch | 2:a9d1a9c92927 | 71 | * @returns true if succeeded |
| yamaguch | 2:a9d1a9c92927 | 72 | */ |
| yamaguch | 1:a22e390c70b3 | 73 | bool setTime() { |
| yamaguch | 1:a22e390c70b3 | 74 | Timer timer; |
| yamaguch | 1:a22e390c70b3 | 75 | timer.start(); |
| yamaguch | 1:a22e390c70b3 | 76 | while (timer.read() < timeout) { |
| yamaguch | 1:a22e390c70b3 | 77 | DatagramSocket datagram; |
| yamaguch | 1:a22e390c70b3 | 78 | char buf[48] = {0x23}; // 00100011 LI(0), Version(4), Mode(3: Client) |
| yamaguch | 1:a22e390c70b3 | 79 | datagram.write(buf, sizeof(buf)); |
| yamaguch | 1:a22e390c70b3 | 80 | datagram.send(server, 123); |
| yamaguch | 1:a22e390c70b3 | 81 | |
| yamaguch | 1:a22e390c70b3 | 82 | if (datagram.receive(0, timeout) > 0) { |
| yamaguch | 1:a22e390c70b3 | 83 | if (datagram.read(buf, sizeof(buf))) { |
| yamaguch | 1:a22e390c70b3 | 84 | unsigned long seconds = 0; |
| yamaguch | 1:a22e390c70b3 | 85 | for (int i = 40; i <= 43; i++) |
| yamaguch | 1:a22e390c70b3 | 86 | seconds = (seconds << 8) | buf[i]; |
| yamaguch | 1:a22e390c70b3 | 87 | set_time(time_t(seconds - 2208988800ULL)); |
| yamaguch | 1:a22e390c70b3 | 88 | return true; |
| yamaguch | 1:a22e390c70b3 | 89 | } |
| yamaguch | 1:a22e390c70b3 | 90 | } |
| yamaguch | 1:a22e390c70b3 | 91 | } |
| yamaguch | 1:a22e390c70b3 | 92 | |
| yamaguch | 1:a22e390c70b3 | 93 | return false; |
| yamaguch | 1:a22e390c70b3 | 94 | } |
| yamaguch | 1:a22e390c70b3 | 95 | |
| yamaguch | 1:a22e390c70b3 | 96 | private: |
| yamaguch | 2:a9d1a9c92927 | 97 | char server[32]; |
| yamaguch | 1:a22e390c70b3 | 98 | float timeout; |
| yamaguch | 1:a22e390c70b3 | 99 | }; |