# Copyright (c) 1995-2004 Graham Barr <gbarr@pobox.com>. All rights reserved.
# This program is free software; you can redistribute it and/or
# modify it under the same terms as Perl itself.
use vars
qw($VERSION @ISA @EXPORT_OK $TIMEOUT);
@EXPORT_OK = qw(inet_time inet_daytime);
my($pname,$pnum,$host,$proto,$timeout) = @_;
my $port = (getservbyname($pname, $proto))[2] || $pnum;
my $hosts = defined $host ?
[ $host ] : $NetConfig{$pname . '_hosts'};
$me = IO
::Socket
::INET
->new(PeerAddr
=> $host,
IO
::Select
->new($me)->can_read($timeout)
my $s = _socket
('time',37,@_) || return undef;
unless defined $s->recv($buf, length(pack("N",0)));
# unpack, we | 0 to ensure we have an unsigned
my $time = (unpack("N",$buf))[0] | 0;
# the time protocol return time in seconds since 1900, convert
# it to a the required format
# MacOS return seconds since 1904, 1900 was not a leap year.
$offset = (4 * 31536000) | 0;
# otherwise return seconds since 1972, there were 17 leap years between
$offset = (70 * 31536000 + 17 * 86400) | 0;
my $s = _socket
('daytime',13,@_) || return undef;
defined($s->recv($buf, 1024)) ?
$buf
Net::Time - time and daytime network client interface
use Net::Time qw(inet_time inet_daytime);
print inet_time(); # use default host from Net::Config
print inet_time('localhost');
print inet_time('localhost', 'tcp');
print inet_daytime(); # use default host from Net::Config
print inet_daytime('localhost');
print inet_daytime('localhost', 'tcp');
C<Net::Time> provides subroutines that obtain the time on a remote machine.
=item inet_time ( [HOST [, PROTOCOL [, TIMEOUT]]])
Obtain the time on C<HOST>, or some default host if C<HOST> is not given
or not defined, using the protocol as defined in RFC868. The optional
argument C<PROTOCOL> should define the protocol to use, either C<tcp> or
C<udp>. The result will be a time value in the same units as returned
by time() or I<undef> upon failure.
=item inet_daytime ( [HOST [, PROTOCOL [, TIMEOUT]]])
Obtain the time on C<HOST>, or some default host if C<HOST> is not given
or not defined, using the protocol as defined in RFC867. The optional
argument C<PROTOCOL> should define the protocol to use, either C<tcp> or
C<udp>. The result will be an ASCII string or I<undef> upon failure.
Graham Barr <gbarr@pobox.com>
Copyright (c) 1995-2004 Graham Barr. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.