chrony/ntp_io_linux.h
Miroslav Lichvar 3dc9f1ff92 ntp: don't require previous HW TX timestamp to wait for another
Clients sockets are closed immediately after receiving valid response.
Don't wait for the first early HW TX timestamp to enable waiting for
late timestamps. It may take a long time or never come if the HW/driver
is consistently slow. It's a chicken and egg problem.

Instead, simply check if HW timestamping is enabled on at least one
interface. Responses from NTP sources on other interfaces will always be
saved (for 1 millisecond by default).
2023-08-08 16:06:58 +02:00

45 lines
1.6 KiB
C

/*
chronyd/chronyc - Programs for keeping computer clocks accurate.
**********************************************************************
* Copyright (C) Miroslav Lichvar 2016
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
**********************************************************************
=======================================================================
This is the header file for the Linux-specific NTP socket I/O bits.
*/
#ifndef GOT_NTP_IO_LINUX_H
#define GOT_NTP_IO_LINUX_H
#include "socket.h"
extern void NIO_Linux_Initialise(void);
extern void NIO_Linux_Finalise(void);
extern int NIO_Linux_IsHwTsEnabled(void);
extern int NIO_Linux_SetTimestampSocketOptions(int sock_fd, int client_only, int *events);
extern int NIO_Linux_ProcessMessage(SCK_Message *message, NTP_Local_Address *local_addr,
NTP_Local_Timestamp *local_ts, int event);
extern void NIO_Linux_RequestTxTimestamp(SCK_Message *message, int sock_fd);
#endif