* OpenWRT 19.07 with kernel 4.14.131 armv7l * busybox 1.30.1 ----- # /sbin/ntpd -nNlSddddp 1.openwrt.pool.ntp.org # ss -tulpn | grep 123 udp UNCONN 0 0 *:123 *:* users:(("ntpd",pid=15989,fd=3)) ----- # ntpq -p localhost: timed out, nothing received ***Request timed out ntpd: malformed packet received from ::1: size 12 ntpd: malformed packet received from ::1: size 12 ----- # ntpdate localhost no server suitable for synchronization found no output from ntpd ----- # ntpdc -lnps localhost: timed out, nothing received ***Request timed out localhost: timed out, nothing received ***Request timed out localhost: timed out, nothing received ***Request timed out no output from ntpd ----- # ntptime -r ntp_gettime() returns code 5 (ERROR) ntp_adjtime() returns code 5 (ERROR) no output from ntpd
http://lists.busybox.net/pipermail/busybox/2019-July/087369.html ntpq sends a packet with m_status of 0x16, which is NTPv2, "reserved1" mode (6). Probably described here: https://docs.ntpsec.org/latest/mode6.html and in this case, it is probably used to get peer list. busybox does not understand these extensions. ----- whilst his explains the failing queries with ntpq -p it does not however for: # ntpdate localhost no server suitable for synchronization found # ntpdc -lnps localhost: timed out, nothing received ***Request timed out localhost: timed out, nothing received ***Request timed out localhost: timed out, nothing received ***Request timed out # ntptime -r ntp_gettime() returns code 5 (ERROR) ntp_adjtime() returns code 5 (ERROR)
ntpq | ntpdc queries relying on NTPv2 mode (6) which is not supported by busybox. ntptime is not a tool for querying ntpd, instead it reads and sets kernel time variables whilst ntpdate localhost strangely fails it works with ntpdate -d localhost