sntp (util v1.3.5)

Implements SNTP query logic. SNTP - Simple Network Time Protocol (RFC-2030).

Author: Serge Aleynikov saleyn@gmail.com

Summary

Functions

avg_time()

Query NTP time sources from "/etc/ntp.conf" and return min/max/avg offset of current host from given time sources. See: avg_time/1.

avg_time(ServerAddresses)

Query ServerAddress NTP time sources and return min/max/avg offset of current host from given time sources.

time(ServerAddress)

Query ServerAddress time source to find out server time and current host's offset from time source.

time_servers()

Return a list of default NTP time servers for this host.

time_servers(Resolve)

Return a list of default NTP time servers for this host. If Resolve is true, the list will contain IP addresses or else host names.

Functions

avg_time()

-spec avg_time() -> {Min :: integer(), Max :: integer(), Avg :: integer()}.

Query NTP time sources from "/etc/ntp.conf" and return min/max/avg offset of current host from given time sources. See: avg_time/1.

avg_time(ServerAddresses)

-spec avg_time([inet:ip_address()]) -> {Min :: integer(), Max :: integer(), Avg :: integer()}.

Query ServerAddress NTP time sources and return min/max/avg offset of current host from given time sources.

time(ServerAddress)

-spec time(ServerAddress :: inet:ip_address()) ->
              #sntp{version :: term(),
                    stratum :: term(),
                    precision :: term(),
                    rootdelay :: term(),
                    rootdisp :: term(),
                    refid :: term(),
                    reftime :: term(),
                    transtime :: term(),
                    delay :: term(),
                    offset :: term()}.

Query ServerAddress time source to find out server time and current host's offset from time source.

time_servers()

-spec time_servers() -> [inet:ip_address()].

Return a list of default NTP time servers for this host.

time_servers(Resolve)

-spec time_servers(boolean()) -> [inet:ip_address()].

Return a list of default NTP time servers for this host. If Resolve is true, the list will contain IP addresses or else host names.