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.
70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/*
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chronyd/chronyc - Programs for keeping computer clocks accurate.
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**********************************************************************
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* Copyright (C) Richard P. Curnow 1997-2002
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* Copyright (C) Miroslav Lichvar 2014
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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 NTP socket I/O bits.
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*/
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#ifndef GOT_NTP_IO_H
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#define GOT_NTP_IO_H
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#include "ntp.h"
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#include "addressing.h"
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#include "socket.h"
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/* Function to initialise the module. */
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extern void NIO_Initialise(void);
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/* Function to finalise the module */
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extern void NIO_Finalise(void);
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/* Function to obtain a socket for sending client packets */
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extern int NIO_OpenClientSocket(NTP_Remote_Address *remote_addr);
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/* Function to obtain a socket for sending server/peer packets */
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extern int NIO_OpenServerSocket(NTP_Remote_Address *remote_addr);
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/* Function to close a socket returned by NIO_OpenClientSocket() */
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extern void NIO_CloseClientSocket(int sock_fd);
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/* Function to close a socket returned by NIO_OpenServerSocket() */
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extern void NIO_CloseServerSocket(int sock_fd);
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/* Function to check if socket is a server socket */
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extern int NIO_IsServerSocket(int sock_fd);
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/* Function to check if a server socket is currently open */
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extern int NIO_IsServerSocketOpen(void);
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/* Function to check if client packets can be sent to a server */
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extern int NIO_IsServerConnectable(NTP_Remote_Address *remote_addr);
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/* Function to unwrap an NTP message from non-native transport (e.g. PTP) */
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extern int NIO_UnwrapMessage(SCK_Message *message, int sock_fd);
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/* Function to transmit a packet */
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extern int NIO_SendPacket(NTP_Packet *packet, NTP_Remote_Address *remote_addr,
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NTP_Local_Address *local_addr, int length, int process_tx);
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#endif /* GOT_NTP_IO_H */
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