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|
# Test using UDP with two IO::Multiplex
# servers communicating with each other.
# Assume no UDP packet loss on loopback.
# This script tests the following:
# 1) Sending packets using a connected UDP socket.
# (connect() and send() syscalls)
# 2) Sending packets using unconnected UDP socket.
# (sendto() syscall)
# 3) Receiving UDP packets.
# (bind() and recv() syscalls)
# 4) The tied handle interface to send UDP data.
# print $fh $UDP_data;
# 5) The mux_input interface for incoming UDP data.
# (simple $$data scalar consumption)
use strict;
use Test;
use IO::Socket;
use IO::Multiplex;
use POSIX qw(ENOTCONN EDESTADDRREQ);
if($^O eq 'MSWin32')
{ no warnings;
*ENOTCONN = sub() {10057};
}
$| = 1;
plan tests => 15;
# Create a recv()ing socket.
ok my $sock1 = new IO::Socket::INET
LocalAddr => "127.0.0.1",
Proto => "udp",
or die $!;
my $magic_port = $sock1->sockport;
# Create connect()ed socket for send()ing.
ok my $sock2 = new IO::Socket::INET
PeerAddr => "127.0.0.1",
PeerPort => $magic_port,
Proto => "udp",
or die $!;
# Create a generic unconnected socket for sendto()ing.
ok my $sock3 = new IO::Socket::INET
Proto => "udp"
or die $!;
my $msg1 = "uno";
my $msg2 = "dos";
my $msg3 = "tres";
my $msg4 = "cuatro";
my $msg5 = "cinco";
my $msg6 = "seis";
my $pid = fork();
# Catch runaway processes just in case...
alarm(10);
$SIG{ALRM} = sub {
die "[$$] Got bored";
};
if (!defined $pid) {
ok 0;
die "fork: $!";
}
if ($pid) {
# Parent process
# This will be the Pitcher IO::Multiplex server.
my $plexer = new IO::Multiplex;
$plexer->add($sock2);
$plexer->add($sock3);
$plexer->set_callback_object("Pitcher");
# Set timer to do mux_timeout in 2 seconds
$plexer->set_timeout($sock2, 2);
$plexer->loop;
ok 1;
exit;
} else {
# Child process
# This will be the Catcher IO::Multiplex server.
# (No talking allowed.)
my $plexer = new IO::Multiplex;
$plexer->add($sock1);
$plexer->set_callback_object("Catcher");
$plexer->loop;
exit;
}
sub Pitcher::mux_timeout {
my $self = shift;
my $mux = shift;
my $fh = shift;
if (fileno $fh == fileno $sock2) {
ok 1;
# Connected UDP socket should know where to send it
print $fh $msg1;
ok !$!;
} elsif (fileno $fh == fileno $sock3) {
ok 1;
# Unconnected UDP socket should fail
# when trying to send() a packet.
$! = 0;
print $fh $msg2;
ok ($! == ENOTCONN || $! == EDESTADDRREQ)
or warn "DEBUG: bang = [$!](".($!+0).")";
# Grab the real peer destination.
ok my $saddr = $mux->{_fhs}{$sock2}{udp_peer};
# Unconnected UDP socket will sendto() just fine
# but only with an explicit destination.
ok send($fh, $msg3, 0, $saddr);
ok !$!;
} else {
die "$$: Not my fh?";
}
}
sub Pitcher::mux_input {
my $package = shift;
my $mux = shift;
my $fh = shift;
my $data = shift;
if (fileno $fh == fileno $sock2) {
ok ($$data eq $msg2);
$mux->set_timeout($sock3, 3);
} elsif (fileno $fh == fileno $sock3) {
if ($$data eq $msg4) {
ok 1;
# Even though this was the unconnected socket,
# it should remember where the last packer came from.
print $fh $msg5;
ok !$!;
} elsif ($$data eq $msg6) {
# Yippy, caught the final packet
ok 1;
# All done
$mux->endloop;
} else {
die "sock3 caught weird [$$data]";
}
} else {
die "$$: Pitcher found something weird [$$data]";
}
$$data = "";
}
# Just bounce it back with one up
sub Catcher::mux_input {
my $package = shift;
my $mux = shift;
my $fh = shift;
my $data = shift;
if ($$data eq $msg1) {
print $fh $msg2;
} elsif ($$data eq $msg3) {
print $fh $msg4;
} elsif ($$data eq $msg5) {
print $fh $msg6;
# I'm done.
$mux->endloop;
} else {
die "$$: Caught something weird [$$data]";
}
$$data = "";
}
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