diff options
| author | Lennart Poettering <lennart@poettering.net> | 2014-05-06 18:08:04 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2014-05-06 18:08:04 +0200 |
| commit | 661278ee297247c0c7e0708924f8ce52284529fc (patch) | |
| tree | 3354d9078f6709887e827714ffb1657de0dbc279 /src/timesync/timesyncd.c | |
| parent | dfdb269daf539470c6bcf232a58c6cd1e4492fc8 (diff) | |
timesyncd: never accept NTP time from server that is older than systemd's release time
Diffstat (limited to 'src/timesync/timesyncd.c')
| -rw-r--r-- | src/timesync/timesyncd.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/timesync/timesyncd.c b/src/timesync/timesyncd.c index 6e38a2cb89..dabad5e196 100644 --- a/src/timesync/timesyncd.c +++ b/src/timesync/timesyncd.c @@ -573,12 +573,18 @@ static int manager_receive_response(sd_event_source *source, int fd, uint32_t re m->event_timeout = sd_event_source_unref(m->event_timeout); + if (be32toh(ntpmsg.recv_time.sec) < TIME_EPOCH + OFFSET_1900_1970 || + be32toh(ntpmsg.trans_time.sec) < TIME_EPOCH + OFFSET_1900_1970) { + log_debug("Invalid reply, returned times before epoch. Ignoring."); + return manager_connect(m); + } + if (NTP_FIELD_LEAP(ntpmsg.field) == NTP_LEAP_NOTINSYNC) { log_debug("Server is not synchronized. Disconnecting."); return manager_connect(m); } - if (NTP_FIELD_VERSION(ntpmsg.field) != 4 && NTP_FIELD_VERSION(ntpmsg.field) != 3) { + if (!IN_SET(NTP_FIELD_VERSION(ntpmsg.field), 3, 4)) { log_debug("Response NTPv%d. Disconnecting.", NTP_FIELD_VERSION(ntpmsg.field)); return manager_connect(m); } |