From 19f4f86bfed21c5326ed2acebe1163f3a83e832b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 04:25:50 +0200 Subject: Adding upstream version 241. Signed-off-by: Daniel Baumann --- src/timesync/timesyncd-ntp-message.h | 45 ++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 src/timesync/timesyncd-ntp-message.h (limited to 'src/timesync/timesyncd-ntp-message.h') diff --git a/src/timesync/timesyncd-ntp-message.h b/src/timesync/timesyncd-ntp-message.h new file mode 100644 index 0000000..14fba6d --- /dev/null +++ b/src/timesync/timesyncd-ntp-message.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ +#pragma once + +#include "sparse-endian.h" + +/* NTP protocol, packet header */ +#define NTP_LEAP_PLUSSEC 1 +#define NTP_LEAP_MINUSSEC 2 +#define NTP_LEAP_NOTINSYNC 3 +#define NTP_MODE_CLIENT 3 +#define NTP_MODE_SERVER 4 +#define NTP_FIELD_LEAP(f) (((f) >> 6) & 3) +#define NTP_FIELD_VERSION(f) (((f) >> 3) & 7) +#define NTP_FIELD_MODE(f) ((f) & 7) +#define NTP_FIELD(l, v, m) (((l) << 6) | ((v) << 3) | (m)) + +/* + * "NTP timestamps are represented as a 64-bit unsigned fixed-point number, + * in seconds relative to 0h on 1 January 1900." + */ +#define OFFSET_1900_1970 UINT64_C(2208988800) + +struct ntp_ts { + be32_t sec; + be32_t frac; +} _packed_; + +struct ntp_ts_short { + be16_t sec; + be16_t frac; +} _packed_; + +struct ntp_msg { + uint8_t field; + uint8_t stratum; + int8_t poll; + int8_t precision; + struct ntp_ts_short root_delay; + struct ntp_ts_short root_dispersion; + char refid[4]; + struct ntp_ts reference_time; + struct ntp_ts origin_time; + struct ntp_ts recv_time; + struct ntp_ts trans_time; +} _packed_; -- cgit v1.2.3