be3158c4e5
Allow NTP messages to be exchanged as a payload of PTP messages to enable full hardware timestamping on NICs that can timestamp PTP packets only. Implemented is the protocol described in this draft (version 00): https://datatracker.ietf.org/doc/draft-mlichvar-ntp-over-ptp/ This is an experimental feature. It can be changed or removed in future. The used PTP domain is 123 and the NTP TLV type is 0x2023 from the "do not propagate" experimental range. The ptpport directive enables NTP-over-PTP as a server and as a client for all sources that have the port option set to the PTP port. The port should be the PTP event port (319) to trigger timestamping in the hardware. The implementation is contained to ntp_io. It is transparent to ntp_core.
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/*
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Miroslav Lichvar 2021
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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**********************************************************************
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=======================================================================
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This is the header file for the Precision Time Protocol (PTP).
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*/
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#ifndef GOT_PTP_H
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#define GOT_PTP_H
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#include "sysincl.h"
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#include "ntp.h"
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#define PTP_VERSION 2
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#define PTP_TYPE_DELAY_REQ 1
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#define PTP_DOMAIN_NTP 123
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#define PTP_FLAG_UNICAST (1 << (2 + 8))
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#define PTP_TLV_NTP 0x2023
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typedef struct {
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uint8_t type;
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uint8_t version;
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uint16_t length;
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uint8_t domain;
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uint8_t min_sdoid;
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uint16_t flags;
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uint8_t rest[26];
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} PTP_Header;
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typedef struct {
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uint16_t type;
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uint16_t length;
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} PTP_TlvHeader;
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typedef struct {
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PTP_Header header;
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uint8_t origin_ts[10];
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PTP_TlvHeader tlv_header;
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NTP_Packet ntp_msg;
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} PTP_NtpMessage;
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#define PTP_NTP_PREFIX_LENGTH (int)offsetof(PTP_NtpMessage, ntp_msg)
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#endif
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