mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-09-03 00:41:57 +00:00
8a9153678a
Use 64-bit time in order to avoid overlaps, and do not use K_MSEC() as that will convert to k_timeout_t which we do not want in this case. Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
/*
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* Copyright (c) 2019 Linaro Limited
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <errno.h>
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#include <net/sntp.h>
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#include <net/socketutils.h>
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int sntp_simple(const char *server, u32_t timeout, struct sntp_time *time)
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{
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int res;
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static struct addrinfo hints;
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struct addrinfo *addr;
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struct sntp_ctx sntp_ctx;
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u64_t deadline;
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u32_t iter_timeout;
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hints.ai_family = AF_INET;
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_protocol = 0;
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/* 123 is the standard SNTP port per RFC4330 */
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res = net_getaddrinfo_addr_str(server, "123", &hints, &addr);
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if (res < 0) {
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/* Just in case, as namespace for getaddrinfo errors is
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* different from errno errors.
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*/
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errno = EDOM;
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return res;
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}
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res = sntp_init(&sntp_ctx, addr->ai_addr, addr->ai_addrlen);
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if (res < 0) {
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goto freeaddr;
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}
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if (timeout == NET_WAIT_FOREVER) {
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deadline = (u64_t)timeout;
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} else {
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deadline = k_uptime_get() + (u64_t)timeout;
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}
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/* Timeout for current iteration */
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iter_timeout = 100;
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while (k_uptime_get() < deadline) {
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res = sntp_query(&sntp_ctx, iter_timeout, time);
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if (res != -ETIMEDOUT) {
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break;
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}
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/* Exponential backoff with limit */
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if (iter_timeout < 1000) {
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iter_timeout *= 2;
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}
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}
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sntp_close(&sntp_ctx);
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freeaddr:
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freeaddrinfo(addr);
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return res;
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}
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