package ProFTPD::Tests::Config::MaxClients;

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

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

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

  maxclients_one_ifsess_sql_per_user_regex => {
    order => ++$order,
    test_class => [qw(forking mod_ifsession mod_sql mod_sql_sqlite)],
  },

};

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

sub list_tests {
  return testsuite_get_runnable_tests($TESTS);
}

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

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

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

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

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

  auth_user_write($auth_user_file, $user, $passwd, 500, 500, $home_dir,
    '/bin/bash');
  auth_group_write($auth_group_file, 'ftpd', 500, $user);

  my $max_clients = 1;

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

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

    MaxClients => $max_clients,

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

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

  # 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 {
      # First client should be able to connect and log in...
      my $client1 = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);
      $client1->login($user, $passwd);

      # ...but the second client should be able to connect, but not login.
      my $client2 = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);

      eval { $client2->login($user, $passwd) };
      unless ($@) {
        die("Login succeeded unexpectedly");
      }

      $client1->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 maxclients_one_ifsess_per_user_regex {
  my $self = shift;
  my $tmpdir = $self->{tmpdir};

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

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

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

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

  auth_user_write($auth_user_file, $user, $passwd, 500, 500, $home_dir,
    '/bin/bash');
  auth_group_write($auth_group_file, 'ftpd', 500, $user);

  my $max_clients = 1;

  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>
    MaxClients $max_clients
  </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 {
      # First client should be able to connect and log in...
      my $client1 = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);
      $client1->login($user, $passwd);

      # ...but the second client should be able to connect, but not login.
      my $client2 = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);

      eval { $client2->login($user, $passwd) };
      unless ($@) {
        die("Login succeeded unexpectedly");
      }

      $client1->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 maxclients_one_ifsess_sql_per_user_regex {
  my $self = shift;
  my $tmpdir = $self->{tmpdir};

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

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

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

  my $db_file = File::Spec->rel2abs("$tmpdir/proftpd.db");

  # Build up sqlite3 command to create users, groups tables and populate them
  my $db_script = File::Spec->rel2abs("$tmpdir/proftpd.sql");

  if (open(my $fh, "> $db_script")) {
    print $fh <<EOS;
CREATE TABLE users (
  userid TEXT,
  passwd TEXT,
  uid INTEGER,
  gid INTEGER,
  homedir TEXT, 
  shell TEXT,
  lastdir TEXT
);
INSERT INTO users (userid, passwd, uid, gid, homedir, shell) VALUES ('$user', '$passwd', 500, 500, '$home_dir', '/bin/bash');
CREATE TABLE groups (
  groupname TEXT,
  gid INTEGER,
  members TEXT
);
INSERT INTO groups (groupname, gid, members) VALUES ('ftpd', 500, '$user');
EOS

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

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

  my $cmd = "sqlite3 $db_file < $db_script";

  if ($ENV{TEST_VERBOSE}) {
    print STDERR "Executing sqlite3: $cmd\n";
  }

  my @output = `$cmd`;
  if (scalar(@output) &&
      $ENV{TEST_VERBOSE}) {
    print STDERR "Output: ", join('', @output), "\n";
  }

  my $max_clients = 1;

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

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

      'mod_sql.c' => {
        SQLAuthTypes => 'plaintext',
        SQLBackend => 'sqlite3',
        SQLConnectInfo => $db_file,
        SQLLogFile => $log_file,
      },
    },
  };

  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>
    MaxClients $max_clients
  </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 {
      # First client should be able to connect and log in...
      my $client1 = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);
      $client1->login($user, $passwd);

      # ...but the second client should be able to connect, but not login.
      my $client2 = ProFTPD::TestSuite::FTP->new('127.0.0.1', $port);

      eval { $client2->login($user, $passwd) };
      unless ($@) {
        die("Login succeeded unexpectedly");
      }

      $client1->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);
}

1;
