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package Qooxdoo::Services::Tr;
use strict;
use POSIX qw(setsid);
use Time::HiRes qw(usleep);
use Socket;
sub GetAccessibility {
return "public";
}
sub launch {
my $error = shift;
my $rounds = shift;
my $delay = shift;
my $host = shift;
defined(my $pid = fork) or do { $error->set_error(101,"Can't fork: $!");return $error};
if ($pid){
open my $x, ">/tmp/tr_session.$pid" or do {
$error->set_error(199,"Opening /tmp/tr_session.$$: $!");
return $error;
};
close ($x);
return $pid;
}
chdir '/' or die "Can't chdir to /: $!";
# $|++; # unbuffer
open STDOUT, ">>/tmp/tr_session.$$"
or die "Can't write to /tmp/tr_session.$$: $!";
open STDIN, '/dev/null' or die "Can't read /dev/null: $!";
setsid or die "Can't start a new session: $!";
open STDERR, '>&STDOUT' or die "Can't dup stdout: $!";
for (my $i = 0; $i<$rounds;$i++){
my $start = time;
system "traceroute","-I","-q","1",$host;
my $wait = $delay - (time - $start);
if ($wait > 0 and $i+1< $rounds){
print "SLEEP $wait\n";
sleep $wait;
}
}
exit 0;
}
sub get_number {
my $error = shift;
my $data = shift;
$data = 'Undefined' unless defined $data;
if ($data =~ /^(\d+)$/){
return $1;
}
else {
$error->set_error(104,"Expected a number but got: $data");
return $error;
}
}
sub method_stop_tr {
my $error = shift;
my $arg = shift;
my $handle = get_number($error,$arg);
return $handle if ref $handle;
my $data = "/tmp/tr_session.".$handle;
if (-r $data){
warn "Sending kill $handle";
if (kill('KILL',$handle)){
waitpid($handle,0);
}
}
return 'ok';
}
sub method_run_tr
{
my $error = shift;
my $arg = shift;
my $handle = get_number($error,$arg->{handle});
my $point = get_number($error,$arg->{point});
my @array;
if ($arg->{host}){
my $host = $arg->{host};
if ( my @addresses = gethostbyname($host) ){
@addresses = map { inet_ntoa($_) } @addresses[4 .. $#addresses];
if ($#addresses > 1){
$host = $addresses[rand($#addresses)];
push @array, ['INFO',"Found $#addresses addresses for $arg->{host}. Using $host."];
}
}
my $delay = get_number($error,$arg->{delay});
return $delay if ref $delay;
my $rounds = get_number($error,$arg->{rounds});
return $rounds if ref $rounds;
$handle = launch ($error,$rounds,$delay,$host);
$point = 0;
}
return $point if ref $point;
return $handle if ref $handle;
my $data = "/tmp/tr_session.".$handle;
if (open my $fh,$data){
my $again;
my $size;
my $rounds = 0;
do {
$size = -s $fh;
# make sure we reap any zombi instances of tr
# this is especially important when running with speedy of fastcgi
# 1 = WNOHANG
waitpid($handle,1);
$again = kill(0, $handle);
usleep(1000*300) if $rounds;
# print STDERR "$again, $handle, $size, $point\n";
$rounds ++;
} while ($again and $point >= $size);
# print STDERR "$point > $size\n";
if (seek $fh, $point,0){
while (<$fh>){
#print STDERR ">$_<";
next if /^\s*$/ or /traceroute to/;
if (/^\s*(\d+)\s+(\S+)\s+\((\S+?)\)\s+(\S+)\s+ms/){
my ($hop,$host,$ip,$value) = ($1,$2,$3,$4);
$value = undef unless $value =~ /^\d+(\.\d+)?$/;
push @array, [$hop,$host,$ip,$value];
}
elsif (/^\s*(\d+)\s+\*/){
push @array, [$1,undef,undef,undef];
}
elsif (/^SLEEP\s+(\d+)/){
push @array, ['SLEEP',$1];
}
elsif (s/traceroute:\s*//g or /\n$/){
push @array, ['INFO',$_];
}
else {
last;
}
$point = tell($fh);
};
close $fh;
unlink $data unless $again;
return {
handle=>$handle,
point=>$point,
output=>\@array,
again=> $again,
}
}
else {
$error->set_error(102,"Seeking in traceroute output to $point: $!");
return $error;
}
}
else {
$error->set_error(103,"Opening $data: $!");
return $error;
}
}
1;
|
