<?php
/*
	vnstat2.inc
	part of pfSense (https://www.pfSense.org/)
	Copyright (C) 2010 PerryMason
	Copyright (C) 2015 ESF, LLC
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are met:

	1. Redistributions of source code must retain the above copyright notice,
	   this list of conditions and the following disclaimer.

	2. Redistributions in binary form must reproduce the above copyright
	   notice, this list of conditions and the following disclaimer in the
	   documentation and/or other materials provided with the distribution.

	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	POSSIBILITY OF SUCH DAMAGE.
*/
require_once("util.inc");

function vnstat_install_deinstall() {
	// Remove Vnstat package and files
	exec("/bin/rm -d -R /usr/local/www/vnstat2");
	exec("/bin/rm -d -R /usr/local/www/vnstati");
	exec("/bin/rm -d -R /usr/local/pkg/vnstat2");
	exec("/bin/rm /usr/local/etc/vnstat.conf");
	// Remove vnstat cron entry from config.xml
	install_cron_job("/usr/local/pkg/vnstat2/vnstat2.sh", false);
}

function change_vnstat_conf() {
	conf_mount_rw();
	global $config;
	$config['installedpackages']['vnstat2']['config'][0]['monthrotate'] = $_POST['monthrotate'];
	$config['installedpackages']['vnstat2']['config'][0]['vnstat_phpfrontend'] = $_POST['vnstat_phpfrontend'];
	write_conf_f();
	write_config();

	if ($config['installedpackages']['vnstat2']['config'][0]['vnstat_phpfrontend'] == "on") {
		vnstat_php_frontend();
	} else {
		exec("[ -d /usr/local/www/vnstat2 ] && /bin/rm -d -R /usr/local/www/vnstat2");
	}
	conf_mount_ro();
}

function write_conf_f() {
	global $config;
	$monthrotate = $config['installedpackages']['vnstat2']['config'][0]['monthrotate'];

	// Write new vnstat.conf
	$vnstat_conf_file = <<<EOF
# vnStat 1.12 config file
##

# location of the database directory
DatabaseDir "/conf/vnstat"

# on which day should months change
MonthRotate $monthrotate

# vnstati
##

# image colors
CBackground     "F0F0F0"
CEdge           "AEAEAE"
CHeader         "990000"
CHeaderTitle    "F0F0F0"
CHeaderDate     "FFFFFF"
CText           "000000"
CLine           "B0B0B0"
CLineL          "-"
CRx             "666666"
CTx             "990000"
CRxD            "-"
CTxD            "-"
EOF;

	$hf2 = fopen("/usr/local/etc/vnstat.conf", "w");
	if (!$hf2) {
		log_error("could not open /usr/local/etc/vnstat.conf for writing");
		exit;
	}
	fwrite($hf2, $vnstat_conf_file);
	fclose($hf2);
	vnstat_link_config();
	vnstat_create_nic_dbs();
}

function create_vnstati_image() {
	conf_mount_rw();
	global $config;
	$vnstat_tmp = "/tmp/vnstat";
	$iface = $_POST['vnstat_interface'];
	$ifaces_final = convert_friendly_interface_to_real_interface_name($iface);
	$config['installedpackages']['vnstat2']['config'][0]['vnstat_interface'] = $ifaces_final;
	safe_mkdir($vnstat_tmp);
	exec("/usr/local/bin/vnstati -i " . escapeshellarg($ifaces_final) . " -vs -o {$vnstat_tmp}/newpicture1.png");
	exec("/usr/local/bin/vnstati -i " . escapeshellarg($ifaces_final) . " -m -o {$vnstat_tmp}/newpicture2.png");
	exec("/usr/local/bin/vnstati -i " . escapeshellarg($ifaces_final) . " -d -o {$vnstat_tmp}/newpicture3.png");
	exec("/usr/local/bin/vnstati -i " . escapeshellarg($ifaces_final) . " -t -o {$vnstat_tmp}/newpicture4.png");
	write_config();
	conf_mount_ro();
}

function create_vnstat_output() {
	conf_mount_rw();
	global $config;
	$iface2 = $_POST['vnstat_interface2'];
	$ifaces_final2 = convert_friendly_interface_to_real_interface_name($iface2);
	$config['installedpackages']['vnstat2']['config'][0]['vnstat_interface2'] = $ifaces_final2;
	write_config();
	conf_mount_ro();
}

function vnstat_link_config() {
	// Check for PBI install and arch type, then create symlinks
	if (file_exists('/usr/pbi/vnstat-' . php_uname("m"))) {
		$conf_path = "/usr/local/etc/vnstat.conf";
		$pbi_conf_path = "/usr/pbi/vnstat-" . php_uname("m") . "/etc/vnstat.conf";
		unlink_if_exists($pbi_conf_path);
		symlink($conf_path, $pbi_conf_path);
	}
}

function vnstat_create_nic_dbs() {
	global $config;
	conf_mount_rw();
	$vnstat_db_prefix = "/conf/vnstat";
	safe_mkdir($vnstat_db_prefix);

	// Locate NICs and create associated databases
	$array_of_real_nic_names = array();
	$array_of_custom_nic_names = array();
	$ifdescrs = array('wan' => 'WAN', 'lan' => 'LAN');
	for ($j = 1; isset($config['interfaces']['opt' . $j]); $j++) {
		$ifdescrs['opt' . $j] = $config['interfaces']['opt' . $j]['descr'];
	}
	foreach ($ifdescrs as $ifdescr => $ifname) {
		$real_nic_names = convert_friendly_interface_to_real_interface_name($ifdescr);
		array_push($array_of_real_nic_names, $real_nic_names);
	}
	$vnstat_nic = array_map('basename', glob($vnstat_db_prefix . '/*', GLOB_ONLYDIR));

	// Compare real NICs with NICs assigned to vnstat
	$leftovers = array_diff($array_of_real_nic_names, $vnstat_nic);
	// Create database for each NIC
	foreach ($leftovers as $nic) {
		exec("/usr/local/bin/vnstat -u -i ". escapeshellarg($nic));
	}
	conf_mount_ro();
}

function vnstat_install_config() {
	$vnstat_db_prefix = "/conf/vnstat";
	global $config;
	conf_mount_rw();
	// Create vnstat database dir where it also will work for nanobsd
	if (is_dir("/usr/local/pkg/vnstat2/vnstat")) {
		@rename("/usr/local/pkg/vnstat2/vnstat", $vnstat_db_prefix);
	}
	safe_mkdir($vnstat_db_prefix);

	vnstat_link_config();
	// Add MonthRotate value to config.xml and write /usr/local/etc/vnstat.conf
	if ($config['installedpackages']['vnstat2']['config'][0]['monthrotate'] == "") {
		$config['installedpackages']['vnstat2']['config'][0]['monthrotate'] = "1";
	}
	if ($config['installedpackages']['vnstat2']['config'][0]['vnstat_phpfrontend'] == "on") {
		vnstat_php_frontend();
	}
	write_conf_f();
	// Add cron job to config.xml
	install_cron_job("/usr/local/pkg/vnstat2/vnstat2.sh", true, "*/1");
	vnstat_create_nic_dbs();
	write_config();
	conf_mount_ro();
}

function vnstat_php_frontend() {
	global $config;
	// Copy vnstat_php_frontend to www
	exec("/bin/cp -a /usr/local/pkg/vnstat2/vnstat_php_frontend/. /usr/local/www/vnstat2/");
	// Find information to be written in config.php
	// $iface_list_array_items
	exec("/bin/ls /conf/vnstat/ | /usr/bin/grep -v '\.'", $vnstat_nic_in);
	$iface_list_array_items = implode("', '", $vnstat_nic_in);
	$iface_list_array = "\$iface_list = array('$iface_list_array_items');";
	// $iface_title_array_items
	$iface_title_array_items = array();
	$iface_title_array_items2 = array();
	foreach ($vnstat_nic_in as $vnstat_nic_out) {
		$ifdescrs = array('wan' => 'WAN', 'lan' => 'LAN');
		for ($j = 1; isset($config['interfaces']['opt' . $j]); $j++) {
			$ifdescrs['opt' . $j] = $config['interfaces']['opt' . $j]['descr'];
		}
		foreach ($ifdescrs as $ifdescr => $ifname) {
			$real_nic_names3 = get_real_interface($ifdescr);
			if ($real_nic_names3 == $vnstat_nic_out) {
				$ifname_out = convert_friendly_interface_to_friendly_descr($ifdescr);
				$iface_title_array_items = "\$iface_title['$vnstat_nic_out'] = '$ifname_out';\n";
				array_push($iface_title_array_items2, $iface_title_array_items);
			}
		}
	}
	$iface_title_array = implode($iface_title_array_items2);
	// PHP in static items
	// Added to new items for the front end version 1.5.1
	$locale = "\$locale = 'en_US.UTF-8';";
	$language = "\$language = 'en';";
	$vnstat_bin2 = "\$vnstat_bin = '/usr/local/bin/vnstat';";
	$data_dir2 = "\$data_dir = './dumps';";
	$graph_format2 ="\$graph_format='svg';";
	$colorscheme2 = "\$colorscheme['light'] = array(";
	$colorscheme3 = "\$colorscheme['red'] = array(";
	$colorscheme4 = "\$colorscheme['pfSense'] = array(";
	// Write new config.php
	$config_file = <<<EOF
<?php
	//
	// vnStat PHP frontend 1.5.1 (c)2006-2008 Bjorge Dijkstra (bjd@jooz.net)
	//
	// This program is free software; you can redistribute it and/or modify
	// it under the terms of the GNU General Public License as published by
	// the Free Software Foundation; either version 2 of the License, or
	// (at your option) any later version.
	//
	// This program is distributed in the hope that it will be useful,
	// but WITHOUT ANY WARRANTY; without even the implied warranty of
	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	// GNU General Public License for more details.
	//
	// You should have received a copy of the GNU General Public License
	// along with this program; if not, write to the Free Software
	// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
	//
	//
	// see file COPYING or at http://www.gnu.org/licenses/gpl.html
	// for more information.
	//
	//error_reporting(E_ALL | E_NOTICE);

	//
	// configuration parameters
	//
	// edit these to reflect your particular situation
	//
	$locale
	$language
	// list of network interfaces monitored by vnStat
	$iface_list_array

	//
	// optional names for interfaces
	// if there's no name set for an interface then the interface identifier
	// will be displayed instead
	$iface_title_array

	//
	// There are two possible sources for vnstat data. If the
	// variable is set then vnstat is called directly from the PHP script
	// to get the interface data.
	//
	// The other option is to periodically dump the vnstat interface data to
	// a file (e.g. by a cronjob). In that case the  variable
	// must be cleared and set  to the location where the dumps
	// are stored. Dumps must be named 'vnstat_dump_'.
	//
	// You can generate vnstat dumps with the command:
	//   vnstat --dumpdb -i  > /path/to/data_dir/vnstat_dump_
	//
	$vnstat_bin2
	$data_dir2

	// graphics format to use: svg or png
	$graph_format2

	// Font to use for PNG graphs
	define('GRAPH_FONT',dirname(__FILE__).'/VeraBd.ttf');

	// Font to use for SVG graphs
	define('SVG_FONT', 'Verdana');

	// color schemes
	// colors are defined as R,G,B,ALPHA quads where R, G and B range from 0-255
	// and ALPHA from 0-127 where 0 is opaque and 127 completely transparent.
	//
	define('DEFAULT_COLORSCHEME', 'pfSense');
?>
EOF;

	$hf = fopen("/usr/local/www/vnstat2/config.php", "w");
	if (!$hf) {
		log_error("could not open /usr/local/www/vnstat2/config.php for writing");
		exit;
	}
	fwrite($hf, $config_file);
	fclose($hf);
}

?>