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#!/usr/bin/perl
# $OpenBSD: run.pl,v 1.1 1999/08/05 22:42:14 niklas Exp $
# $EOM: run.pl,v 1.2 1999/08/05 22:42:42 niklas Exp $
use strict;
require 5.002;
require 'sys/syscall.ph';
use Socket;
use Sys::Hostname;
my ($rfd, $tickfac, $myaddr, $myport, $hisaddr, $hisport, $proto, $bindaddr,
$conaddr, $sec, $tick, $action, $template, $data, $next,
$nfd, $pkt, $verbose);
$| = 1;
$verbose = 1;
$tickfac = 0.001;
$myaddr = gethostbyname ('127.0.0.1');
$myport = 1501;
$hisaddr = inet_aton ('127.0.0.1');
$hisport = 1500;
$proto = getprotobyname ('udp');
$bindaddr = sockaddr_in ($myport, $myaddr);
socket (SOCKET, PF_INET, SOCK_DGRAM, $proto) || die "socket: $!";
bind (SOCKET, $bindaddr);
vec ($rfd, fileno SOCKET, 1) = 1;
$conaddr = sockaddr_in ($hisport, $hisaddr);
sub getsec
{
my ($tv) = pack ("ll", 0, 0);
my ($tz) = pack ("ii", 0, 0);
syscall (&SYS_gettimeofday, $tv, $tz) && return undef;
my ($sec, $usec) = unpack ("ll", $tv);
$sec % 86400 + $usec / 1000000;
}
$sec = &getsec;
while (<>) {
next if /^\s*#/o || /^\s*$/o;
chop;
($tick, $action, $template, $data) = split ' ', $_, 4;
while ($data =~ /\\$/o) {
chop $data;
$_ = <>;
next if /^\s*#/o;
chop;
$data .= $_;
}
$data =~ s/\s//go;
$data = pack $template, $data;
$next = $sec + $tick * $tickfac;
if ($action eq "send") {
# Wait for the moment to come.
print STDERR "waiting ", $next - $sec, " secs\n";
select undef, undef, undef, $next - $sec
while ($sec = &getsec) < $next;
# print $data;
send SOCKET, $data, 0, $conaddr;
print STDERR "sent ", unpack ("H*", $data), "\n" if $verbose;
} elsif ($action eq "recv") {
$sec = &getsec;
printf (STDERR "waiting for data or the %.3f sec timeout\n",
$next - $sec);
$nfd = select $rfd, undef, undef, $next - $sec;
if ($nfd) {
printf STDERR "got back after %.3f secs\n", &getsec - $sec
if $verbose;
# sysread (STDIN, $pkt, 65536) if $nfd;
sysread (SOCKET, $pkt, 65536) if $nfd;
print STDERR "read ", unpack ("H*", $pkt), "\n" if $verbose;
print STDERR "cmp ", unpack ("H*", $data), "\n" if $verbose;
} else {
print STDERR "timed out\n" if $verbose;
}
die "mismatch\n" if $pkt ne $data;
}
}
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