a63bdcbacb
An example output:
nsh> ntpcstatus
The number of last samples: 5
[0] srv 178.16.23.50 offset -0.014006560 delay 0.349967444
[1] srv 5.9.57.158 offset 0.001792161 delay 0.269991633
[2] srv 206.75.147.25 offset 0.009916600 delay 0.129989672
[3] srv 162.159.200.1 offset 0.011508908 delay 0.019917401
[4] srv 185.19.184.35 offset 0.021468135 delay 0.239915030
nsh>
126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
/****************************************************************************
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* system/ntpc/ntpc_status.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <inttypes.h>
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#ifdef CONFIG_LIBC_NETDB
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#include <netdb.h>
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include "netutils/ntpclient.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/* "-", uint64_t, ".", 9 digits fraction part, NUL */
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#define NTP_TIME_STR_MAX_LEN (1 + 21 + 1 + 9 + 1)
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static void
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format_ntptimestamp(int64_t ts, FAR char *buf)
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{
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FAR const char *sign;
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uint64_t absts;
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if (ts < 0)
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{
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sign = "-";
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absts = -ts;
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}
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else
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{
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sign = "";
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absts = ts;
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}
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sprintf(buf, "%s%" PRIu64 ".%09" PRIu64,
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sign, absts >> 32,
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((absts & 0xffffffff) * NSEC_PER_SEC) >> 32);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* ntpcstatus_main
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****************************************************************************/
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int main(int argc, FAR char *argv[])
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{
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struct ntpc_status_s status;
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unsigned int i;
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int ret;
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ret = ntpc_status(&status);
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if (ret < 0)
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{
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fprintf(stderr, "ERROR: ntpc_status() failed\n");
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return EXIT_FAILURE;
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}
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printf("The number of last samples: %u\n", status.nsamples);
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for (i = 0; i < status.nsamples; i++)
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{
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FAR const struct sockaddr *sa;
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socklen_t salen;
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FAR const char *name = "<noname>";
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char offset_buf[NTP_TIME_STR_MAX_LEN];
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char delay_buf[NTP_TIME_STR_MAX_LEN];
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sa = status.samples[i].srv_addr;
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salen = (sa->sa_family == AF_INET) ? sizeof(struct sockaddr_in)
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: sizeof(struct sockaddr_in6);
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#ifdef CONFIG_LIBC_NETDB
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char hbuf[NI_MAXHOST];
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ret = getnameinfo(sa, salen,
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hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST);
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if (ret == 0)
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{
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name = hbuf;
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}
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else
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{
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fprintf(stderr, "WARNING: getnameinfo failed: %s\n",
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gai_strerror(ret));
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}
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#endif
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format_ntptimestamp(status.samples[i].offset, offset_buf);
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format_ntptimestamp(status.samples[i].delay, delay_buf);
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printf("[%u] srv %s offset %s delay %s\n",
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i, name, offset_buf, delay_buf);
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}
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return EXIT_SUCCESS;
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}
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