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use strict;
BEGIN {
if ($ENV{PERL_CORE}) {
unless ($ENV{PERL_TEST_Net_Ping}) {
print "1..0 # Skip: network dependent test\n";
exit;
}
}
if ($^O eq 'freebsd') {
print "1..0 \# Skip: unreliable localhost resolver on $^O\n";
exit;
}
unless (eval "require Socket") {
print "1..0 \# Skip: no Socket\n";
exit;
}
if (my $port = getservbyname('echo', 'tcp')) {
socket(*ECHO, &Socket::PF_INET(), &Socket::SOCK_STREAM(),
(getprotobyname 'tcp')[2]);
unless (connect(*ECHO,
scalar
&Socket::sockaddr_in($port,
&Socket::inet_aton("localhost"))))
{
print "1..0 \# Skip: loopback tcp echo service is off ($!)\n";
exit;
}
close (*ECHO);
} else {
print "1..0 \# Skip: no echo port\n";
exit;
}
unless (Socket::getaddrinfo('localhost', &Socket::AF_INET)) {
print "1..0 \# Skip: no localhost resolver on $^O\n";
exit;
}
}
# Test of stream protocol using loopback interface.
#
# NOTE:
# The echo service must be enabled on localhost
# to really test the stream protocol ping. See
# the end of this document on how to enable it.
use Test::More tests => 23;
use Net::Ping;
my $p = new Net::Ping "stream";
# new() worked?
isa_ok($p, 'Net::Ping', 'new() worked');
# message_type can't be used
eval {
$p->message_type();
};
like($@, qr/message type only supported on 'icmp' protocol/, "message_type() API only concern 'icmp' protocol");
is($p->ping("localhost"), 1, 'Attempt to connect to the echo port');
for (1..20) {
select (undef,undef,undef,0.1);
is($p->ping("localhost"), 1, 'Try several pings while it is connected');
}
__END__
A simple xinetd configuration to enable the echo service can easily be made.
Just create the following file before restarting xinetd:
/etc/xinetd.d/echo:
# description: An echo server.
service echo
{
type = INTERNAL
id = echo-stream
socket_type = stream
protocol = tcp
user = root
wait = no
disable = no
}
Or if you are using inetd, before restarting, add
this line to your /etc/inetd.conf:
echo stream tcp nowait root internal
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