Module sntp

Authors: Serge Aleynikov (saleyn@gmail.com).

Description

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

avg_time/0	Query NTP time sources from `"/etc/ntp.conf"` and return min/max/avg offset of current host from given time sources.
avg_time/1	Query `ServerAddress` NTP time sources and return min/max/avg offset of current host from given time sources.
time/1	Query `ServerAddress` time source to find out server time and current host's offset from time source.
time_servers/0	Return a list of default NTP time servers for this host.
time_servers/1	Return a list of default NTP time servers for this host.

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 also: avg_time/1.

avg_time(ServerAddresses :: [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 :: inet:ip_address()) -> #sntp{}

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

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

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

time_servers(Resolve :: 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.