package ProFTPD::Tests::Modules::mod_ifsession;

use lib qw(t/lib);
use base qw(ProFTPD::TestSuite::Child);
use strict;

use File::Path qw(mkpath);
use File::Spec;
use IO::Handle;

use ProFTPD::TestSuite::FTP;
use ProFTPD::TestSuite::Utils qw(:auth :config :running :test :testsuite);

$| = 1;

my $order = 0;

my $TESTS = {
  ifuser_allowoverwrite => {
    order => ++$order,
    test_class => [qw(forking)],
  },

  ifgroup_dir_allow_mkd_bug3467 => {
    order => ++$order,
    test_class => [qw(bug forking rootprivs)],
  },

  ifuser_dir_allow_mkd_bug3467 => {
    order => ++$order,
    test_class => [qw(bug forking)],
  },

  ifclass_dir_allow_mkd_bug3467 => {
    order => ++$order,
    test_class => [qw(bug forking)],
  },

  ifuser_login_deny_by_ip => {
    order => ++$order,
    test_class => [qw(forking)],
  },

  ifgroup_ifclass_login_allowclass_bug3547 => {
    order => ++$order,
    test_class => [qw(bug forking)],
  },

  ifuser_regex_login_deny_by_ip_bug3625 => {
    order => ++$order,
    test_class => [qw(bug forking)],
  },

};

sub new {
  return shift()->SUPER::new(@_);
}

sub list_tests {
  return testsuite_get_runnable_tests($TESTS);
}

sub ifuser_allowoverwrite { 
  my $self = shift;
  my $tmpdir = $self->{tmpdir};

  my $config_file = "$tmpdir/ifsess.conf";
  my $pid_file = File::Spec->rel2abs("$tmpdir/ifsess.pid");
  my $scoreboard_file = File::Spec->rel2abs("$tmpdir/ifsess.scoreboard");

  my $log_file = File::Spec->rel2abs('tests.log');

  my $auth_user_file = File::Spec->rel2abs("$tmpdir/ifsess.passwd");
  my $auth_group_file = File::Spec->rel2abs("$tmpdir/ifsess.group");

  my $test_file = File::Spec->rel2abs($config_file);

  my $user = 'proftpd';
  my $passwd = 'test';
  my $home_dir = File::Spec->rel2abs($tmpdir);
  my $uid = 500;
  my $gid = 500;

  # Make sure that, if we're running as root, that the home directory has
  # permissions/privs set for the account we create
  if ($< == 0) {
    unless (chmod(0755, $home_dir)) {
      die("Can't set perms on $home_dir to 0755: $!");
    }

    unless (chown($uid, $gid, $home_dir)) {
      die("Can't set owner of $home_dir to $uid/$gid: $!");
    }
  }

  my $ftpaccess_file = File::Spec->rel2abs("$tmpdir/.ftpaccess");
  if (open(my $fh, "> $ftpaccess_file")) {
    print $fh "AllowOverwrite on\n";

    unless (close($fh)) {
      die("Can't write $ftpaccess_file: $!");
    }

  } else {
    die("Can't open $ftpaccess_file: $!");
  }

  my $test_file = File::Spec->rel2abs("$tmpdir/test.txt");
  if (open(my $fh, "> $test_file")) {
    close($fh);

  } else {
    die("Can't open $test_file: $!");
  }

  auth_user_write($auth_user_file, $user, $passwd, $uid, $gid, $home_dir,
    '/bin/bash');
  auth_group_write($auth_group_file, 'ftpd', $gid, $user);

  my $config = {
    PidFile => $pid_file,
    ScoreboardFile => $scoreboard_file,
    SystemLog => $log_file,

    AuthUserFile => $auth_user_file,
    AuthGroupFile => $auth_group_file,

    IfModules => {
      'mod_delay.c' => {
        DelayEngine => 'off',
      },
    },
  };

  my ($port, $config_user, $config_group) = config_write($config_file, $config,
    { NoAllowOverride => 1 });

  # Append the mod_ifsession config to the end of the config file
  if (open(my $fh, ">> $config_file")) {
    print $fh <<EOC;
<IfModule mod_ifsession.c>
  <IfUser $user>
    AllowOverride on
  </IfUser>

  <IfUser !$user>
    AllowOverride off
  </IfUser>
</IfModule>
EOC
    unless (close($fh)) {
      die("Can't write $config_file: $!");
    }

  } else {
    die("Can't open $config_file: $!");
  }

  # Open pipes, for use between the parent and child processes.  Specifically,
  # the child will indicate when it's done with its test by writing a message
  # to the parent.
  my ($rfh, $wfh);
  unless (pipe($rfh, $wfh)) {
    die("Can't open pipe: $!");
  }

  my $ex;

  # Fork child
  $self->handle_sigchld();
  defined(my $pid = fork()) or die("Can't fork: $!");
  if ($pid) {
    eval {
      my $client = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);

      $client->login($user, $passwd);

      my $conn = $client->stor_raw('test.txt');
      unless ($conn) {
        die("Failed to STOR test.txt: " . $client->response_code() . " " .
          $client->response_msg());
      }

      $conn->close();
      $client->quit();
    };

    if ($@) {
      $ex = $@;
    }

    $wfh->print("done\n");
    $wfh->flush();

  } else {
    eval { server_wait($config_file, $rfh) };
    if ($@) {
      warn($@);
      exit 1;
    }

    exit 0;
  }

  # Stop server
  server_stop($pid_file);

  $self->assert_child_ok($pid);

  if ($ex) {
    die($ex);
  }

  unlink($log_file);
}

sub ifgroup_dir_allow_mkd_bug3467 { 
  my $self = shift;
  my $tmpdir = $self->{tmpdir};

  my $config_file = "$tmpdir/ifsess.conf";
  my $pid_file = File::Spec->rel2abs("$tmpdir/ifsess.pid");
  my $scoreboard_file = File::Spec->rel2abs("$tmpdir/ifsess.scoreboard");

  my $log_file = File::Spec->rel2abs('tests.log');

  my $auth_user_file = File::Spec->rel2abs("$tmpdir/ifsess.passwd");
  my $auth_group_file = File::Spec->rel2abs("$tmpdir/ifsess.group");

  my $test_file = File::Spec->rel2abs($config_file);

  my $user = 'proftpd';
  my $group = 'ftpd'; 
  my $passwd = 'test';
  my $home_dir = File::Spec->rel2abs($tmpdir);
  my $uid = 500;
  my $gid = 500;

  my $user_dir = File::Spec->rel2abs("$home_dir/$user");
  mkpath($user_dir);

  my $ftpaccess_file = File::Spec->rel2abs("$user_dir/.ftpaccess");
  if (open(my $fh, "> $ftpaccess_file")) {
    print $fh "Umask 022\n";

    unless (close($fh)) {
      die("Can't write $ftpaccess_file: $!");
    }

  } else {
    die("Can't open $ftpaccess_file: $!");
  }

  # Make sure that, if we're running as root, that the home directory has
  # permissions/privs set for the account we create
  if ($< == 0) {
    unless (chmod(0755, $home_dir, $user_dir)) {
      die("Can't set perms on $home_dir to 0755: $!");
    }

    unless (chown($uid, $gid, $home_dir, $user_dir)) {
      die("Can't set owner of $home_dir to $uid/$gid: $!");
    }
  }

  auth_user_write($auth_user_file, $user, $passwd, $uid, $gid, $home_dir,
    '/bin/bash');
  auth_group_write($auth_group_file, $group, $gid, $user);

  my $config = {
    PidFile => $pid_file,
    ScoreboardFile => $scoreboard_file,
    SystemLog => $log_file,

    AllowOverride => 'on',
    AuthUserFile => $auth_user_file,
    AuthGroupFile => $auth_group_file,

    DefaultRoot => "~ $group",

    IfModules => {
      'mod_delay.c' => {
        DelayEngine => 'off',
      },
    },
  };

  my ($port, $config_user, $config_group) = config_write($config_file, $config);

  # Append the mod_ifsession config to the end of the config file
  if (open(my $fh, ">> $config_file")) {
    print $fh <<EOC;
<Directory />
  <Limit ALL>
    DenyAll
  </Limit>
</Directory>

<IfGroup $group>
  <Directory ~>
    <Limit ALL>
      AllowAll
    </Limit>
  </Directory>
</IfGroup>
EOC
    unless (close($fh)) {
      die("Can't write $config_file: $!");
    }

  } else {
    die("Can't open $config_file: $!");
  }

  # Open pipes, for use between the parent and child processes.  Specifically,
  # the child will indicate when it's done with its test by writing a message
  # to the parent.
  my ($rfh, $wfh);
  unless (pipe($rfh, $wfh)) {
    die("Can't open pipe: $!");
  }

  my $ex;

  # Fork child
  $self->handle_sigchld();
  defined(my $pid = fork()) or die("Can't fork: $!");
  if ($pid) {
    eval {
      my $client = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);
      $client->login($user, $passwd);

      $client->pwd(); 
      $client->mkd('foo');
      $client->quit();
    };

    if ($@) {
      $ex = $@;
    }

    $wfh->print("done\n");
    $wfh->flush();

  } else {
    eval { server_wait($config_file, $rfh) };
    if ($@) {
      warn($@);
      exit 1;
    }

    exit 0;
  }

  # Stop server
  server_stop($pid_file);

  $self->assert_child_ok($pid);

  if ($ex) {
    die($ex);
  }

  unlink($log_file);
}

sub ifuser_dir_allow_mkd_bug3467 { 
  my $self = shift;
  my $tmpdir = $self->{tmpdir};

  my $config_file = "$tmpdir/ifsess.conf";
  my $pid_file = File::Spec->rel2abs("$tmpdir/ifsess.pid");
  my $scoreboard_file = File::Spec->rel2abs("$tmpdir/ifsess.scoreboard");

  my $log_file = File::Spec->rel2abs('tests.log');

  my $auth_user_file = File::Spec->rel2abs("$tmpdir/ifsess.passwd");
  my $auth_group_file = File::Spec->rel2abs("$tmpdir/ifsess.group");

  my $test_file = File::Spec->rel2abs($config_file);

  my $user = 'proftpd';
  my $group = 'ftpd'; 
  my $passwd = 'test';
  my $home_dir = File::Spec->rel2abs($tmpdir);
  my $uid = 500;
  my $gid = 500;

  # Make sure that, if we're running as root, that the home directory has
  # permissions/privs set for the account we create
  if ($< == 0) {
    unless (chmod(0755, $home_dir)) {
      die("Can't set perms on $home_dir to 0755: $!");
    }

    unless (chown($uid, $gid, $home_dir)) {
      die("Can't set owner of $home_dir to $uid/$gid: $!");
    }
  }

  auth_user_write($auth_user_file, $user, $passwd, $uid, $gid, $home_dir,
    '/bin/bash');
  auth_group_write($auth_group_file, $group, $gid, $user);

  my $config = {
    PidFile => $pid_file,
    ScoreboardFile => $scoreboard_file,
    SystemLog => $log_file,
    TraceLog => $log_file,
    Trace => 'directory:20',

    AuthUserFile => $auth_user_file,
    AuthGroupFile => $auth_group_file,

    IfModules => {
      'mod_delay.c' => {
        DelayEngine => 'off',
      },
    },
  };

  my ($port, $config_user, $config_group) = config_write($config_file, $config);

  # Append the mod_ifsession config to the end of the config file
  if (open(my $fh, ">> $config_file")) {
    print $fh <<EOC;
<Directory />
  <Limit ALL>
    DenyAll
  </Limit>
</Directory>

<IfUser $user>
  <Directory $home_dir>
    <Limit MKD>
      AllowAll
    </Limit>
  </Directory>
</IfUser>
EOC
    unless (close($fh)) {
      die("Can't write $config_file: $!");
    }

  } else {
    die("Can't open $config_file: $!");
  }

  # Open pipes, for use between the parent and child processes.  Specifically,
  # the child will indicate when it's done with its test by writing a message
  # to the parent.
  my ($rfh, $wfh);
  unless (pipe($rfh, $wfh)) {
    die("Can't open pipe: $!");
  }

  my $ex;

  # Fork child
  $self->handle_sigchld();
  defined(my $pid = fork()) or die("Can't fork: $!");
  if ($pid) {
    eval {
      my $client = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);
      $client->login($user, $passwd);

      $client->mkd('foo');
      $client->quit();
    };

    if ($@) {
      $ex = $@;
    }

    $wfh->print("done\n");
    $wfh->flush();

  } else {
    eval { server_wait($config_file, $rfh) };
    if ($@) {
      warn($@);
      exit 1;
    }

    exit 0;
  }

  # Stop server
  server_stop($pid_file);

  $self->assert_child_ok($pid);

  if ($ex) {
    die($ex);
  }

  unlink($log_file);
}

sub ifclass_dir_allow_mkd_bug3467 { 
  my $self = shift;
  my $tmpdir = $self->{tmpdir};

  my $config_file = "$tmpdir/ifsess.conf";
  my $pid_file = File::Spec->rel2abs("$tmpdir/ifsess.pid");
  my $scoreboard_file = File::Spec->rel2abs("$tmpdir/ifsess.scoreboard");

  my $log_file = File::Spec->rel2abs('tests.log');

  my $auth_user_file = File::Spec->rel2abs("$tmpdir/ifsess.passwd");
  my $auth_group_file = File::Spec->rel2abs("$tmpdir/ifsess.group");

  my $test_file = File::Spec->rel2abs($config_file);

  my $user = 'proftpd';
  my $group = 'ftpd'; 
  my $passwd = 'test';
  my $home_dir = File::Spec->rel2abs($tmpdir);
  my $uid = 500;
  my $gid = 500;

  # Make sure that, if we're running as root, that the home directory has
  # permissions/privs set for the account we create
  if ($< == 0) {
    unless (chmod(0755, $home_dir)) {
      die("Can't set perms on $home_dir to 0755: $!");
    }

    unless (chown($uid, $gid, $home_dir)) {
      die("Can't set owner of $home_dir to $uid/$gid: $!");
    }
  }

  auth_user_write($auth_user_file, $user, $passwd, $uid, $gid, $home_dir,
    '/bin/bash');
  auth_group_write($auth_group_file, $group, $gid, $user);

  my $config = {
    PidFile => $pid_file,
    ScoreboardFile => $scoreboard_file,
    SystemLog => $log_file,
    TraceLog => $log_file,
    Trace => 'directory:20',

    AuthUserFile => $auth_user_file,
    AuthGroupFile => $auth_group_file,
    
    IfModules => {
      'mod_delay.c' => {
        DelayEngine => 'off',
      },
    },
  };

  my ($port, $config_user, $config_group) = config_write($config_file, $config);

  # Append the mod_ifsession config to the end of the config file
  if (open(my $fh, ">> $config_file")) {
    print $fh <<EOC;
<Class local>
  From 127.0.0.1
</Class>

<Directory />
  <Limit ALL>
    DenyAll
  </Limit>
</Directory>

<IfClass local>
  <Directory $home_dir>
    <Limit MKD>
      AllowAll
    </Limit>
  </Directory>
</IfClass>
EOC
    unless (close($fh)) {
      die("Can't write $config_file: $!");
    }

  } else {
    die("Can't open $config_file: $!");
  }

  # Open pipes, for use between the parent and child processes.  Specifically,
  # the child will indicate when it's done with its test by writing a message
  # to the parent.
  my ($rfh, $wfh);
  unless (pipe($rfh, $wfh)) {
    die("Can't open pipe: $!");
  }

  my $ex;

  # Fork child
  $self->handle_sigchld();
  defined(my $pid = fork()) or die("Can't fork: $!");
  if ($pid) {
    eval {
      my $client = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);
      $client->login($user, $passwd);

      $client->mkd('foo');
      $client->quit();
    };

    if ($@) {
      $ex = $@;
    }

    $wfh->print("done\n");
    $wfh->flush();

  } else {
    eval { server_wait($config_file, $rfh) };
    if ($@) {
      warn($@);
      exit 1;
    }

    exit 0;
  }

  # Stop server
  server_stop($pid_file);

  $self->assert_child_ok($pid);

  if ($ex) {
    die($ex);
  }

  unlink($log_file);
}

sub ifuser_login_deny_by_ip  {
  my $self = shift;
  my $tmpdir = $self->{tmpdir};

  my $config_file = "$tmpdir/ifsess.conf";
  my $pid_file = File::Spec->rel2abs("$tmpdir/ifsess.pid");
  my $scoreboard_file = File::Spec->rel2abs("$tmpdir/ifsess.scoreboard");

  my $log_file = File::Spec->rel2abs('tests.log');

  my $auth_user_file = File::Spec->rel2abs("$tmpdir/ifsess.passwd");
  my $auth_group_file = File::Spec->rel2abs("$tmpdir/ifsess.group");

  my $test_file = File::Spec->rel2abs($config_file);

  my $user = 'proftpd';
  my $passwd = 'test';
  my $home_dir = File::Spec->rel2abs($tmpdir);
  my $uid = 500;
  my $gid = 500;

  # Make sure that, if we're running as root, that the home directory has
  # permissions/privs set for the account we create
  if ($< == 0) {
    unless (chmod(0755, $home_dir)) {
      die("Can't set perms on $home_dir to 0755: $!");
    }

    unless (chown($uid, $gid, $home_dir)) {
      die("Can't set owner of $home_dir to $uid/$gid: $!");
    }
  }

  auth_user_write($auth_user_file, $user, $passwd, $uid, $gid, $home_dir,
    '/bin/bash');
  auth_group_write($auth_group_file, 'ftpd', $gid, $user);

  my $config = {
    PidFile => $pid_file,
    ScoreboardFile => $scoreboard_file,
    SystemLog => $log_file,

    AuthUserFile => $auth_user_file,
    AuthGroupFile => $auth_group_file,

    IfModules => {
      'mod_delay.c' => {
        DelayEngine => 'off',
      },
    },
  };

  my ($port, $config_user, $config_group) = config_write($config_file, $config);

  # Inspired by:
  #
  #  http://forums.proftpd.org/smf/index.php/topic,5153.0.html
  #
  # Append the mod_ifsession config to the end of the config file
  if (open(my $fh, ">> $config_file")) {
    print $fh <<EOC;
<IfModule mod_ifsession.c>
  <IfUser $user>
    <Limit LOGIN>
      Deny from 127.0.0.1
    </Limit>
  </IfUser>
</IfModule>
EOC
    unless (close($fh)) {
      die("Can't write $config_file: $!");
    }

  } else {
    die("Can't open $config_file: $!");
  }

  # Open pipes, for use between the parent and child processes.  Specifically,
  # the child will indicate when it's done with its test by writing a message
  # to the parent.
  my ($rfh, $wfh);
  unless (pipe($rfh, $wfh)) {
    die("Can't open pipe: $!");
  }

  my $ex;

  # Fork child
  $self->handle_sigchld();
  defined(my $pid = fork()) or die("Can't fork: $!");
  if ($pid) {
    eval {
      my $client = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);
      eval { $client->login($user, $passwd) };
      unless ($@) {
        die("Login succeeded unexpectedly");
      }
    };

    if ($@) {
      $ex = $@;
    }

    $wfh->print("done\n");
    $wfh->flush();

  } else {
    eval { server_wait($config_file, $rfh) };
    if ($@) {
      warn($@);
      exit 1;
    }

    exit 0;
  }

  # Stop server
  server_stop($pid_file);

  $self->assert_child_ok($pid);

  if ($ex) {
    die($ex);
  }

  unlink($log_file);
}

sub ifgroup_ifclass_login_allowclass_bug3547 {
  my $self = shift;
  my $tmpdir = $self->{tmpdir};

  my $config_file = "$tmpdir/ifsess.conf";
  my $pid_file = File::Spec->rel2abs("$tmpdir/ifsess.pid");
  my $scoreboard_file = File::Spec->rel2abs("$tmpdir/ifsess.scoreboard");

  my $log_file = File::Spec->rel2abs('tests.log');

  my $auth_user_file = File::Spec->rel2abs("$tmpdir/ifsess.passwd");
  my $auth_group_file = File::Spec->rel2abs("$tmpdir/ifsess.group");

  my $user = 'proftpd';
  my $passwd = 'test';
  my $group = 'ftpd';
  my $home_dir = File::Spec->rel2abs($tmpdir);
  my $uid = 500;
  my $gid = 500;

  # Make sure that, if we're running as root, that the home directory has
  # permissions/privs set for the account we create
  if ($< == 0) {
    unless (chmod(0755, $home_dir)) {
      die("Can't set perms on $home_dir to 0755: $!");
    }

    unless (chown($uid, $gid, $home_dir)) {
      die("Can't set owner of $home_dir to $uid/$gid: $!");
    }
  }

  my $test_group = 'test';
  my $test_gid = 501;

  auth_user_write($auth_user_file, $user, $passwd, $uid, $gid, $home_dir,
    '/bin/bash');
  auth_group_write($auth_group_file, $group, $gid, $user);
  auth_group_write($auth_group_file, $test_group, $test_gid, $user);

  my $config = {
    PidFile => $pid_file,
    ScoreboardFile => $scoreboard_file,
    SystemLog => $log_file,
    TraceLog => $log_file,
    Trace => 'ifsession:20',

    AuthUserFile => $auth_user_file,
    AuthGroupFile => $auth_group_file,

    IfModules => {
      'mod_delay.c' => {
        DelayEngine => 'off',
      },
    },
  };

  my ($port, $config_user, $config_group) = config_write($config_file, $config);

  if (open(my $fh, ">> $config_file")) {
    print $fh <<EOC;
<IfModule mod_ifsession.c>
  <Class local>
    From 172.16.0.0/12
    From 192.168.0.0/16
  </Class>

  <Class test>
    From 127.0.0.1
  </Class>

  <IfGroup $test_group>
    <Limit LOGIN>
      AllowClass test
      AllowClass local
      DenyAll
    </Limit>
  </IfGroup>

  <IfGroup !$test_group>
    <Limit LOGIN>
      AllowClass local
      DenyAll
    </Limit>
  </IfGroup>
</IfModule>
EOC
    unless (close($fh)) {
      die("Can't write $config_file: $!");
    }

  } else {
    die("Can't open $config_file: $!");
  }

  # Open pipes, for use between the parent and child processes.  Specifically,
  # the child will indicate when it's done with its test by writing a message
  # to the parent.
  my ($rfh, $wfh);
  unless (pipe($rfh, $wfh)) {
    die("Can't open pipe: $!");
  }

  my $ex;

  # Fork child
  $self->handle_sigchld();
  defined(my $pid = fork()) or die("Can't fork: $!");
  if ($pid) {
    eval {
      my $client = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);
      $client->login($user, $passwd);
    };

    if ($@) {
      $ex = $@;
    }

    $wfh->print("done\n");
    $wfh->flush();

  } else {
    eval { server_wait($config_file, $rfh) };
    if ($@) {
      warn($@);
      exit 1;
    }

    exit 0;
  }

  # Stop server
  server_stop($pid_file);

  $self->assert_child_ok($pid);

  if ($ex) {
    die($ex);
  }

  unlink($log_file);
}

sub ifuser_regex_login_deny_by_ip_bug3625  {
  my $self = shift;
  my $tmpdir = $self->{tmpdir};

  my $config_file = "$tmpdir/ifsess.conf";
  my $pid_file = File::Spec->rel2abs("$tmpdir/ifsess.pid");
  my $scoreboard_file = File::Spec->rel2abs("$tmpdir/ifsess.scoreboard");

  my $log_file = File::Spec->rel2abs('tests.log');

  my $auth_user_file = File::Spec->rel2abs("$tmpdir/ifsess.passwd");
  my $auth_group_file = File::Spec->rel2abs("$tmpdir/ifsess.group");

  my $test_file = File::Spec->rel2abs($config_file);

  my $user = 'proftpd';
  my $passwd = 'test';
  my $group = 'ftpd';
  my $home_dir = File::Spec->rel2abs($tmpdir);
  my $uid = 500;
  my $gid = 500;

  # Make sure that, if we're running as root, that the home directory has
  # permissions/privs set for the account we create
  if ($< == 0) {
    unless (chmod(0755, $home_dir)) {
      die("Can't set perms on $home_dir to 0755: $!");
    }

    unless (chown($uid, $gid, $home_dir)) {
      die("Can't set owner of $home_dir to $uid/$gid: $!");
    }
  }

  auth_user_write($auth_user_file, $user, $passwd, $uid, $gid, $home_dir,
    '/bin/bash');
  auth_group_write($auth_group_file, $group, $gid, $user);

  my $config = {
    PidFile => $pid_file,
    ScoreboardFile => $scoreboard_file,
    SystemLog => $log_file,

    AuthUserFile => $auth_user_file,
    AuthGroupFile => $auth_group_file,

    IfModules => {
      'mod_delay.c' => {
        DelayEngine => 'off',
      },
    },
  };

  my ($port, $config_user, $config_group) = config_write($config_file, $config);

  if (open(my $fh, ">> $config_file")) {
    print $fh <<EOC;
<IfModule mod_ifsession.c>
  <IfUser regex $user>
    <Limit LOGIN>
      Deny from 127.0.0.1
    </Limit>
  </IfUser>
</IfModule>
EOC
    unless (close($fh)) {
      die("Can't write $config_file: $!");
    }

  } else {
    die("Can't open $config_file: $!");
  }

  # Open pipes, for use between the parent and child processes.  Specifically,
  # the child will indicate when it's done with its test by writing a message
  # to the parent.
  my ($rfh, $wfh);
  unless (pipe($rfh, $wfh)) {
    die("Can't open pipe: $!");
  }

  my $ex;

  # Fork child
  $self->handle_sigchld();
  defined(my $pid = fork()) or die("Can't fork: $!");
  if ($pid) {
    eval {
      my $client = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);
      eval { $client->login($user, $passwd) };
      unless ($@) {
        die("Login succeeded unexpectedly");
      }
    };

    if ($@) {
      $ex = $@;
    }

    $wfh->print("done\n");
    $wfh->flush();

  } else {
    eval { server_wait($config_file, $rfh) };
    if ($@) {
      warn($@);
      exit 1;
    }

    exit 0;
  }

  # Stop server
  server_stop($pid_file);

  $self->assert_child_ok($pid);

  if ($ex) {
    die($ex);
  }

  unlink($log_file);
}

1;