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ntp: add server support for network correction

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Provide the network correction (PTP correction + RX duration) of the
request in the new extension field if included in the request and
NTP-over-PTP is enabled.
This commit is contained in:
Miroslav Lichvar 2023-09-26 12:39:25 +02:00
parent d9ae724c60
commit 8eef631009
1 changed files with 34 additions and 0 deletions
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34
ntp_core.c
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@ -1084,6 +1084,36 @@ add_ef_mono_root(NTP_Packet *message, NTP_PacketInfo *info, struct timespec *rx,
/* ================================================== */
static int
add_ef_net_correction(NTP_Packet *message, NTP_PacketInfo *info,
NTP_Local_Timestamp *local_rx)
{
NTP_EFExpNetCorrection ef;
if (CNF_GetPtpPort() == 0) {
DEBUG_LOG("ptpport disabled");
return 1;
}
memset(&ef, 0, sizeof (ef));
ef.magic = htonl(NTP_EF_EXP_NET_CORRECTION_MAGIC);
if (info->mode != MODE_CLIENT && local_rx->net_correction > local_rx->rx_duration) {
UTI_DoubleToNtp64(local_rx->net_correction, &ef.correction);
}
if (!NEF_AddField(message, info, NTP_EF_EXP_NET_CORRECTION, &ef, sizeof (ef))) {
DEBUG_LOG("Could not add EF");
return 0;
}
info->ext_field_flags |= NTP_EF_FLAG_EXP_NET_CORRECTION;
return 1;
}
/* ================================================== */
static int
transmit_packet(NTP_Mode my_mode, /* The mode this machine wants to be */
int interleaved, /* Flag enabling interleaved mode */
@ -1234,6 +1264,10 @@ transmit_packet(NTP_Mode my_mode, /* The mode this machine wants to be */
our_root_delay, our_root_dispersion))
return 0;
}
if (ext_field_flags & NTP_EF_FLAG_EXP_NET_CORRECTION) {
if (!add_ef_net_correction(&message, &info, local_rx))
return 0;
}
}
do {