net: sntp: Add convenience API for one-shot SNTP query (22f1a291) · Commits · Wenxi XU / zephyr

include/net/sntp.h

+16 −0

Original line number	Diff line number	Diff line
		@@ -82,6 +82,22 @@ int sntp_query(struct sntp_ctx *ctx, u32_t timeout,
		*/
		void sntp_close(struct sntp_ctx *ctx);

		/**
		* @brief Convenience function to query SNTP in one-shot fashion
		*
		* Convenience wrapper which calls getaddrinfo(), sntp_init(),
		* sntp_query(), and sntp_close().
		*
		* @param server Address of server in format addr[:port]
		* @param timeout Query timeout
		* @param time Timestamp including integer and fractional seconds since
		* 1 Jan 1970 (output).
		*
		* @return 0 if ok, <0 if error (-ETIMEDOUT if timeout).
		*/
		int sntp_simple(const char *server, u32_t timeout,
		struct sntp_time *time);

		/**
		* @}
		*/

+1 −0

0 → 100644

+45 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2019 Linaro Limited
		*
		* SPDX-License-Identifier: Apache-2.0
		*/
		#include <errno.h>

		#include <net/sntp.h>
		#include <net/socketutils.h>

		int sntp_simple(const char server, u32_t timeout, struct sntp_time time)
		{
		int res;
		static struct addrinfo hints;
		struct addrinfo *addr;
		struct sntp_ctx sntp_ctx;

		hints.ai_family = AF_INET;
		hints.ai_socktype = SOCK_DGRAM;
		hints.ai_protocol = 0;
		/* 123 is the standard SNTP port per RFC4330 */
		res = net_getaddrinfo_addr_str(server, "123", &hints, &addr);

		if (res < 0) {
		/* Just in case, as namespace for getaddrinfo errors is
		* different from errno errors.
		*/
		errno = EDOM;
		return res;
		}

		res = sntp_init(&sntp_ctx, addr->ai_addr, addr->ai_addrlen);
		if (res < 0) {
		goto freeaddr;
		}

		res = sntp_query(&sntp_ctx, timeout, time);

		sntp_close(&sntp_ctx);

		freeaddr:
		freeaddrinfo(addr);

		return res;
		}