mirror of
https://github.com/RIOT-OS/RIOT.git
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53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
/*
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* Copyright (C) 2016 Luminița Lăzărescu <cluminita.lazarescu@gmail.com>
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup sys_shell_commands
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* @{
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*
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* @file
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* @brief Prints the real time offset from the system time
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*
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* @author Luminița Lăzărescu <cluminita.lazarescu@gmail.com>
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*/
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#include "net/sntp.h"
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#include "net/ntp_packet.h"
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#include "net/af.h"
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#include "net/ipv6/addr.h"
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#define _DEFAULT_TIMEOUT (5000U);
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static void _usage(char *cmd)
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{
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printf("Usage: %s <server addr> [<timeout>]\n", cmd);
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puts("default: timeout = 5000");
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}
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int _ntpdate(int argc, char **argv)
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{
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uint32_t timeout = _DEFAULT_TIMEOUT;
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if (argc < 2) {
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_usage(argv[0]);
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return 1;
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}
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sock_udp_ep_t server = { .port = NTP_PORT, .family = AF_INET6 };
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ipv6_addr_from_str((ipv6_addr_t *)&server.addr, argv[1]);
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if (argc > 2) {
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timeout = atoi(argv[2]);
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}
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if (sntp_sync(&server, timeout) < 0) {
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puts("Error in synchronization");
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return 1;
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}
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printf("Offset: %i\n", (int)sntp_get_offset());
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return 0;
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}
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