120 lines
2.7 KiB
C
120 lines
2.7 KiB
C
/*
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* Copyright (c) 2017 Linaro Limited
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* Copyright (c) 2019 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_INCLUDE_NET_SNTP_H_
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#define ZEPHYR_INCLUDE_NET_SNTP_H_
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#ifdef CONFIG_NET_SOCKETS_POSIX_NAMES
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#include <net/socket.h>
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#else
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#include <posix/sys/socket.h>
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#include <posix/unistd.h>
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#include <posix/poll.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Simple Network Time Protocol API
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* @defgroup sntp SNTP
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* @ingroup networking
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* @{
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*/
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/** SNTP context */
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struct sntp_ctx {
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struct {
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struct pollfd fds[1];
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int nfds;
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int fd;
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} sock;
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/** Timestamp when the request was sent from client to server.
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* This is used to check if the originated timestamp in the server
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* reply matches the one in client request.
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*/
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u32_t expected_orig_ts;
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};
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/** Time as returned by SNTP API, fractional seconds since 1 Jan 1970 */
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struct sntp_time {
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u64_t seconds;
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u32_t fraction;
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};
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/**
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* @brief Initialize SNTP context
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*
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* @param ctx Address of sntp context.
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* @param addr IP address of NTP/SNTP server.
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* @param addr_len IP address length of NTP/SNTP server.
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*
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* @return 0 if ok, <0 if error.
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*/
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int sntp_init(struct sntp_ctx *ctx, struct sockaddr *addr,
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socklen_t addr_len);
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/**
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* @brief SNTP query with seconds precision (deprecated)
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*
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* @param ctx Address of sntp context.
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* @param timeout Timeout of waiting for sntp response (in milliseconds).
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* @param epoch_time Seconds since 1 January 1970 (output).
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*
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* @return 0 if ok, <0 if error (-ETIMEDOUT if timeout).
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*/
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__deprecated int sntp_request(struct sntp_ctx *ctx, u32_t timeout,
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u64_t *epoch_time);
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/**
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* @brief Perform SNTP query
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*
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* @param ctx Address of sntp context.
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* @param timeout Timeout of waiting for sntp response (in milliseconds).
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* @param time Timestamp including integer and fractional seconds since
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* 1 Jan 1970 (output).
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*
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* @return 0 if ok, <0 if error (-ETIMEDOUT if timeout).
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*/
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int sntp_query(struct sntp_ctx *ctx, u32_t timeout,
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struct sntp_time *time);
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/**
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* @brief Release SNTP context
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*
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* @param ctx Address of sntp context.
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*/
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void sntp_close(struct sntp_ctx *ctx);
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/**
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* @brief Convenience function to query SNTP in one-shot fashion
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*
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* Convenience wrapper which calls getaddrinfo(), sntp_init(),
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* sntp_query(), and sntp_close().
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*
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* @param server Address of server in format addr[:port]
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* @param timeout Query timeout
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* @param time Timestamp including integer and fractional seconds since
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* 1 Jan 1970 (output).
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*
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* @return 0 if ok, <0 if error (-ETIMEDOUT if timeout).
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*/
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int sntp_simple(const char *server, u32_t timeout,
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struct sntp_time *time);
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#ifdef __cplusplus
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}
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#endif
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/**
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* @}
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*/
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#endif
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