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ntp: always try to enable SW timestamping on Linux

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Request SW timestamps with SCM_TIMESTAMPING even if HW timestamping is
enabled. This replaces SCM_TIMESTAMP(NS) for RX and enables TX SW
timestamping on interfaces that don't support HW timestamping (or don't
have it enabled) if another interface has HW timestamping enabled.
This commit is contained in:
Miroslav Lichvar
2017-06-05 18:47:05 +02:00
parent b712c100d7
commit b799cfd1c4
2 changed files with 25 additions and 25 deletions
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23
ntp_io.c
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@@ -204,21 +204,18 @@ prepare_socket(int family, int port_number, int client_only)
/* Don't quit - we might survive anyway */
}
#ifdef SO_TIMESTAMP
/* Enable receiving of timestamp control messages */
#ifdef SO_TIMESTAMPNS
/* Try nanosecond resolution first */
if (setsockopt(sock_fd, SOL_SOCKET, SO_TIMESTAMPNS, (char *)&on_off, sizeof(on_off)) < 0)
#endif
if (setsockopt(sock_fd, SOL_SOCKET, SO_TIMESTAMP, (char *)&on_off, sizeof(on_off)) < 0) {
LOG(LOGS_ERR, "Could not set %s socket option", "SO_TIMESTAMP");
/* Don't quit - we might survive anyway */
}
#endif
/* Enable kernel/HW timestamping of packets */
#ifdef HAVE_LINUX_TIMESTAMPING
NIO_Linux_SetTimestampSocketOptions(sock_fd, client_only, &events);
if (!NIO_Linux_SetTimestampSocketOptions(sock_fd, client_only, &events))
#endif
#ifdef SO_TIMESTAMPNS
if (setsockopt(sock_fd, SOL_SOCKET, SO_TIMESTAMPNS, (char *)&on_off, sizeof(on_off)) < 0)
#endif
#ifdef SO_TIMESTAMP
if (setsockopt(sock_fd, SOL_SOCKET, SO_TIMESTAMP, (char *)&on_off, sizeof(on_off)) < 0)
LOG(LOGS_ERR, "Could not set %s socket option", "SO_TIMESTAMP");
#endif
;
#ifdef IP_FREEBIND
/* Allow binding to address that doesn't exist yet */