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Mozilla Public License Version 2.0
==================================
1. Definitions
--------------
1.1. "Contributor"
means each individual or legal entity that creates, contributes to
the creation of, or owns Covered Software.
1.2. "Contributor Version"
means the combination of the Contributions of others (if any) used
by a Contributor and that particular Contributor's Contribution.
1.3. "Contribution"
means Covered Software of a particular Contributor.
1.4. "Covered Software"
means Source Code Form to which the initial Contributor has attached
the notice in Exhibit A, the Executable Form of such Source Code
Form, and Modifications of such Source Code Form, in each case
including portions thereof.
1.5. "Incompatible With Secondary Licenses"
means
(a) that the initial Contributor has attached the notice described
in Exhibit B to the Covered Software; or
(b) that the Covered Software was made available under the terms of
version 1.1 or earlier of the License, but not also under the
terms of a Secondary License.
1.6. "Executable Form"
means any form of the work other than Source Code Form.
1.7. "Larger Work"
means a work that combines Covered Software with other material, in
a separate file or files, that is not Covered Software.
1.8. "License"
means this document.
1.9. "Licensable"
means having the right to grant, to the maximum extent possible,
whether at the time of the initial grant or subsequently, any and
all of the rights conveyed by this License.
1.10. "Modifications"
means any of the following:
(a) any file in Source Code Form that results from an addition to,
deletion from, or modification of the contents of Covered
Software; or
(b) any new file in Source Code Form that contains any Covered
Software.
1.11. "Patent Claims" of a Contributor
means any patent claim(s), including without limitation, method,
process, and apparatus claims, in any patent Licensable by such
Contributor that would be infringed, but for the grant of the
License, by the making, using, selling, offering for sale, having
made, import, or transfer of either its Contributions or its
Contributor Version.
1.12. "Secondary License"
means either the GNU General Public License, Version 2.0, the GNU
Lesser General Public License, Version 2.1, the GNU Affero General
Public License, Version 3.0, or any later versions of those
licenses.
1.13. "Source Code Form"
means the form of the work preferred for making modifications.
1.14. "You" (or "Your")
means an individual or a legal entity exercising rights under this
License. For legal entities, "You" includes any entity that
controls, is controlled by, or is under common control with You. For
purposes of this definition, "control" means (a) the power, direct
or indirect, to cause the direction or management of such entity,
whether by contract or otherwise, or (b) ownership of more than
fifty percent (50%) of the outstanding shares or beneficial
ownership of such entity.
2. License Grants and Conditions
--------------------------------
2.1. Grants
Each Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
(a) under intellectual property rights (other than patent or trademark)
Licensable by such Contributor to use, reproduce, make available,
modify, display, perform, distribute, and otherwise exploit its
Contributions, either on an unmodified basis, with Modifications, or
as part of a Larger Work; and
(b) under Patent Claims of such Contributor to make, use, sell, offer
for sale, have made, import, and otherwise transfer either its
Contributions or its Contributor Version.
2.2. Effective Date
The licenses granted in Section 2.1 with respect to any Contribution
become effective for each Contribution on the date the Contributor first
distributes such Contribution.
2.3. Limitations on Grant Scope
The licenses granted in this Section 2 are the only rights granted under
this License. No additional rights or licenses will be implied from the
distribution or licensing of Covered Software under this License.
Notwithstanding Section 2.1(b) above, no patent license is granted by a
Contributor:
(a) for any code that a Contributor has removed from Covered Software;
or
(b) for infringements caused by: (i) Your and any other third party's
modifications of Covered Software, or (ii) the combination of its
Contributions with other software (except as part of its Contributor
Version); or
(c) under Patent Claims infringed by Covered Software in the absence of
its Contributions.
This License does not grant any rights in the trademarks, service marks,
or logos of any Contributor (except as may be necessary to comply with
the notice requirements in Section 3.4).
2.4. Subsequent Licenses
No Contributor makes additional grants as a result of Your choice to
distribute the Covered Software under a subsequent version of this
License (see Section 10.2) or under the terms of a Secondary License (if
permitted under the terms of Section 3.3).
2.5. Representation
Each Contributor represents that the Contributor believes its
Contributions are its original creation(s) or it has sufficient rights
to grant the rights to its Contributions conveyed by this License.
2.6. Fair Use
This License is not intended to limit any rights You have under
applicable copyright doctrines of fair use, fair dealing, or other
equivalents.
2.7. Conditions
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
in Section 2.1.
3. Responsibilities
-------------------
3.1. Distribution of Source Form
All distribution of Covered Software in Source Code Form, including any
Modifications that You create or to which You contribute, must be under
the terms of this License. You must inform recipients that the Source
Code Form of the Covered Software is governed by the terms of this
License, and how they can obtain a copy of this License. You may not
attempt to alter or restrict the recipients' rights in the Source Code
Form.
3.2. Distribution of Executable Form
If You distribute Covered Software in Executable Form then:
(a) such Covered Software must also be made available in Source Code
Form, as described in Section 3.1, and You must inform recipients of
the Executable Form how they can obtain a copy of such Source Code
Form by reasonable means in a timely manner, at a charge no more
than the cost of distribution to the recipient; and
(b) You may distribute such Executable Form under the terms of this
License, or sublicense it under different terms, provided that the
license for the Executable Form does not attempt to limit or alter
the recipients' rights in the Source Code Form under this License.
3.3. Distribution of a Larger Work
You may create and distribute a Larger Work under terms of Your choice,
provided that You also comply with the requirements of this License for
the Covered Software. If the Larger Work is a combination of Covered
Software with a work governed by one or more Secondary Licenses, and the
Covered Software is not Incompatible With Secondary Licenses, this
License permits You to additionally distribute such Covered Software
under the terms of such Secondary License(s), so that the recipient of
the Larger Work may, at their option, further distribute the Covered
Software under the terms of either this License or such Secondary
License(s).
3.4. Notices
You may not remove or alter the substance of any license notices
(including copyright notices, patent notices, disclaimers of warranty,
or limitations of liability) contained within the Source Code Form of
the Covered Software, except that You may alter any license notices to
the extent required to remedy known factual inaccuracies.
3.5. Application of Additional Terms
You may choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of Covered
Software. However, You may do so only on Your own behalf, and not on
behalf of any Contributor. You must make it absolutely clear that any
such warranty, support, indemnity, or liability obligation is offered by
You alone, and You hereby agree to indemnify every Contributor for any
liability incurred by such Contributor as a result of warranty, support,
indemnity or liability terms You offer. You may include additional
disclaimers of warranty and limitations of liability specific to any
jurisdiction.
4. Inability to Comply Due to Statute or Regulation
---------------------------------------------------
If it is impossible for You to comply with any of the terms of this
License with respect to some or all of the Covered Software due to
statute, judicial order, or regulation then You must: (a) comply with
the terms of this License to the maximum extent possible; and (b)
describe the limitations and the code they affect. Such description must
be placed in a text file included with all distributions of the Covered
Software under this License. Except to the extent prohibited by statute
or regulation, such description must be sufficiently detailed for a
recipient of ordinary skill to be able to understand it.
5. Termination
--------------
5.1. The rights granted under this License will terminate automatically
if You fail to comply with any of its terms. However, if You become
compliant, then the rights granted under this License from a particular
Contributor are reinstated (a) provisionally, unless and until such
Contributor explicitly and finally terminates Your grants, and (b) on an
ongoing basis, if such Contributor fails to notify You of the
non-compliance by some reasonable means prior to 60 days after You have
come back into compliance. Moreover, Your grants from a particular
Contributor are reinstated on an ongoing basis if such Contributor
notifies You of the non-compliance by some reasonable means, this is the
first time You have received notice of non-compliance with this License
from such Contributor, and You become compliant prior to 30 days after
Your receipt of the notice.
5.2. If You initiate litigation against any entity by asserting a patent
infringement claim (excluding declaratory judgment actions,
counter-claims, and cross-claims) alleging that a Contributor Version
directly or indirectly infringes any patent, then the rights granted to
You by any and all Contributors for the Covered Software under Section
2.1 of this License shall terminate.
5.3. In the event of termination under Sections 5.1 or 5.2 above, all
end user license agreements (excluding distributors and resellers) which
have been validly granted by You or Your distributors under this License
prior to termination shall survive termination.
************************************************************************
* *
* 6. Disclaimer of Warranty *
* ------------------------- *
* *
* Covered Software is provided under this License on an "as is" *
* basis, without warranty of any kind, either expressed, implied, or *
* statutory, including, without limitation, warranties that the *
* Covered Software is free of defects, merchantable, fit for a *
* particular purpose or non-infringing. The entire risk as to the *
* quality and performance of the Covered Software is with You. *
* Should any Covered Software prove defective in any respect, You *
* (not any Contributor) assume the cost of any necessary servicing, *
* repair, or correction. This disclaimer of warranty constitutes an *
* essential part of this License. No use of any Covered Software is *
* authorized under this License except under this disclaimer. *
* *
************************************************************************
************************************************************************
* *
* 7. Limitation of Liability *
* -------------------------- *
* *
* Under no circumstances and under no legal theory, whether tort *
* (including negligence), contract, or otherwise, shall any *
* Contributor, or anyone who distributes Covered Software as *
* permitted above, be liable to You for any direct, indirect, *
* special, incidental, or consequential damages of any character *
* including, without limitation, damages for lost profits, loss of *
* goodwill, work stoppage, computer failure or malfunction, or any *
* and all other commercial damages or losses, even if such party *
* shall have been informed of the possibility of such damages. This *
* limitation of liability shall not apply to liability for death or *
* personal injury resulting from such party's negligence to the *
* extent applicable law prohibits such limitation. Some *
* jurisdictions do not allow the exclusion or limitation of *
* incidental or consequential damages, so this exclusion and *
* limitation may not apply to You. *
* *
************************************************************************
8. Litigation
-------------
Any litigation relating to this License may be brought only in the
courts of a jurisdiction where the defendant maintains its principal
place of business and such litigation shall be governed by laws of that
jurisdiction, without reference to its conflict-of-law provisions.
Nothing in this Section shall prevent a party's ability to bring
cross-claims or counter-claims.
9. Miscellaneous
----------------
This License represents the complete agreement concerning the subject
matter hereof. If any provision of this License is held to be
unenforceable, such provision shall be reformed only to the extent
necessary to make it enforceable. Any law or regulation which provides
that the language of a contract shall be construed against the drafter
shall not be used to construe this License against a Contributor.
10. Versions of the License
---------------------------
10.1. New Versions
Mozilla Foundation is the license steward. Except as provided in Section
10.3, no one other than the license steward has the right to modify or
publish new versions of this License. Each version will be given a
distinguishing version number.
10.2. Effect of New Versions
You may distribute the Covered Software under the terms of the version
of the License under which You originally received the Covered Software,
or under the terms of any subsequent version published by the license
steward.
10.3. Modified Versions
If you create software not governed by this License, and you want to
create a new license for such software, you may create and use a
modified version of this License if you rename the license and remove
any references to the name of the license steward (except to note that
such modified license differs from this License).
10.4. Distributing Source Code Form that is Incompatible With Secondary
Licenses
If You choose to distribute Source Code Form that is Incompatible With
Secondary Licenses under the terms of this version of the License, the
notice described in Exhibit B of this License must be attached.
Exhibit A - Source Code Form License Notice
-------------------------------------------
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
If it is not possible or desirable to put the notice in a particular
file, then You may include the notice in a location (such as a LICENSE
file in a relevant directory) where a recipient would be likely to look
for such a notice.
You may add additional accurate notices of copyright ownership.
Exhibit B - "Incompatible With Secondary Licenses" Notice
---------------------------------------------------------
This Source Code Form is "Incompatible With Secondary Licenses", as
defined by the Mozilla Public License, v. 2.0.

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<?php
/**
* Hybula Looking Glass
*
* The LookingGlass class provides all functionality.
*
* @copyright 2022 Hybula B.V.
* @license Mozilla Public License 2.0
* @version 0.1
* @since File available since release 0.1
* @link https://github.com/hybula/lookingglass
*/
declare(strict_types=1);
namespace Hybula;
class LookingGlass
{
public static $targetHost;
public static $targetType;
/**
* Validates the config.php file for required constants.
*
* @return void
*/
public static function validateConfig(): void
{
if (!defined('LG_TITLE')) die('LG_TITLE not found in config.php');
if (!defined('LG_LOGO')) die('LG_LOGO not found in config.php');
if (!defined('LG_LOGO_URL')) die('LG_LOGO_URL not found in config.php');
if (!defined('LG_CSS_OVERRIDES')) die('LG_CSS_OVERRIDES not found in config.php');
if (!defined('LG_BLOCK_NETWORK')) die('LG_BLOCK_NETWORK not found in config.php');
if (!defined('LG_BLOCK_LOOKINGGLAS')) die('LG_BLOCK_LOOKINGGLAS not found in config.php');
if (!defined('LG_BLOCK_SPEEDTEST')) die('LG_BLOCK_SPEEDTEST not found in config.php');
if (!defined('LG_BLOCK_CUSTOM')) die('LG_BLOCK_CUSTOM not found in config.php');
if (!defined('LG_CUSTOM_HTML')) die('LG_CUSTOM_HTML not found in config.php');
if (!defined('LG_CUSTOM_PHP')) die('LG_CUSTOM_PHP not found in config.php');
if (!defined('LG_LOCATION')) die('LG_LOCATION not found in config.php');
if (!defined('LG_FACILITY')) die('LG_FACILITY not found in config.php');
if (!defined('LG_FACILITY_URL')) die('LG_FACILITY_URL not found in config.php');
if (!defined('LG_IPV4')) die('LG_IPV4 not found in config.php');
if (!defined('LG_IPV6')) die('LG_IPV6 not found in config.php');
if (!defined('LG_METHODS')) die('LG_METHODS not found in config.php');
if (!defined('LG_LOCATIONS')) die('LG_LOCATIONSnot found in config.php');
if (!defined('LG_SPEEDTEST_IPERF')) die('LG_SPEEDTEST_IPERF not found in config.php');
if (!defined('LG_SPEEDTEST_LABEL_INCOMING')) die('LG_SPEEDTEST_LABEL_INCOMING not found in config.php');
if (!defined('LG_SPEEDTEST_CMD_INCOMING')) die('LG_SPEEDTEST_CMD_INCOMING not found in config.php');
if (!defined('LG_SPEEDTEST_LABEL_OUTGOING')) die('LG_SPEEDTEST_LABEL_OUTGOING not found in config.php');
if (!defined('LG_SPEEDTEST_CMD_OUTGOING')) die('LG_SPEEDTEST_CMD_OUTGOING not found in config.php');
if (!defined('LG_SPEEDTEST_FILES')) die('LG_SPEEDTEST_FILES not found in config.php');
if (!defined('LG_TERMS')) die('LG_TERMS not found in config.php');
}
/**
* Starts a PHP session and sets security tokens.
*
* @return void
*/
public static function startSession(): void
{
session_name('HYLOOKINGLASS');
@session_start() or die('Could not start session!');
}
/**
* Validates and checks an IPv4 address.
*
* @param string $ip The IPv4 address to validate.
* @return bool True or false depending on validation.
*/
public static function isValidIpv4(string $ip): bool
{
if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
return true;
}
return false;
}
/**
* Validates and checks an IPv6 address.
*
* @param string $ip The IPv6 address to validate.
* @return bool True or false depending on validation.
*/
public static function isValidIpv6(string $ip): bool
{
if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 | FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE)) {
return true;
}
return false;
}
/**
* Validates and checks a host address.
* Differs from isValidIpvX because it also extracts the host.
*
* @param string $host The host to validate.
* @return string Actual hostname or empty if none found.
*/
public static function isValidHost(string $host, string $type): string
{
$host = str_replace(['http://', 'https://'], '', $host);
if (!substr_count($host, '.')) {
return '';
}
if (filter_var('https://' . $host, FILTER_VALIDATE_URL)) {
if ($host = parse_url('https://' . $host, PHP_URL_HOST)) {
if ($type == 'ipv4' && isset(dns_get_record($host, DNS_A)[0]['ip'])) {
return $host;
}
if ($type == 'ipv6' && isset(dns_get_record($host, DNS_AAAA)[0]['ip'])) {
return $host;
}
return '';
}
}
return '';
}
/**
* Determine the IP address of the client.
* Also supports clients behind a proxy, however we need to validate this as this header can be spoofed.
* The REMOTE_ADDR header is secure because it's populated by the webserver (extracted from TCP packets).
*
* @return string The IP address of the client.
*/
public static function detectIpAddress(): string
{
if (isset($_SERVER['HTTP_X_FORWARDED_FOR']) && filter_var($_SERVER['HTTP_X_FORWARDED_FOR'], FILTER_VALIDATE_IP)) {
return $_SERVER['HTTP_X_FORWARDED_FOR'];
} else {
return $_SERVER['REMOTE_ADDR'];
}
}
/**
* Executes a ping command.
*
* @param string $host The target host.
* @param int $count Number of requests.
* @return bool True on success.
*/
public static function ping(string $host, int $count = 4): bool
{
return self::procExecute('ping -c' . $count . ' -w15', $host);
}
/**
* Executes a ping6 command.
*
* @param string $host The target host.
* @param int $count Number of requests.
* @return bool True on success.
*/
public static function ping6(string $host, int $count = 4): bool
{
return self::procExecute('ping -6 -c' . $count . ' -w15', $host);
}
/**
* Executes a mtr command.
*
* @param string $host The target host.
* @return bool True on success.
*/
public static function mtr(string $host): bool
{
return self::procExecute('mtr -4 --report --report-wide', $host);
}
/**
* Executes a mtr6 command.
*
* @param string $host The target host.
* @return bool True on success.
*/
public static function mtr6(string $host): bool
{
return self::procExecute('mtr -6 --report --report-wide', $host);
}
/**
* Executes a traceroute command.
*
* @param string $host The target host.
* @param int $failCount Number of failed hops.
* @return bool True on success.
*/
public static function traceroute(string $host, int $failCount = 4): bool
{
return self::procExecute('traceroute -4 -w2', $host, $failCount);
}
/**
* Executes a traceroute6 command.
*
* @param string $host The target host.
* @param int $failCount Number of failed hops.
* @return bool True on success.
*/
public static function traceroute6(string $host, int $failCount = 4): bool
{
return self::procExecute('traceroute -6 -w2', $host, $failCount);
}
/**
* Executes a command and opens pipe for input/output.
* Directly taken from telephone/LookingGlass (MIT License)
*
* @param string $cmd The command to execute.
* @param string $host The host that is used as param.
* @param int $failCount Number of consecutive failed hops.
* @return boolean True on success.
* @link https://github.com/telephone/LookingGlass/blob/master/LookingGlass/LookingGlass.php#L172
* @license https://github.com/telephone/LookingGlass/blob/master/LICENCE.txt
*/
private static function procExecute(string $cmd, string $host, int $failCount = 2): bool
{
// define output pipes
$spec = array(
0 => array("pipe", "r"),
1 => array("pipe", "w"),
2 => array("pipe", "w")
);
// sanitize + remove single quotes
$host = str_replace('\'', '', filter_var($host, FILTER_SANITIZE_URL));
// execute command
$process = proc_open("{$cmd} '{$host}'", $spec, $pipes, null);
// check pipe exists
if (!is_resource($process)) {
return false;
}
// check for mtr/traceroute
if (strpos($cmd, 'mtr') !== false) {
$type = 'mtr';
} elseif (strpos($cmd, 'traceroute') !== false) {
$type = 'traceroute';
} else {
$type = '';
}
$fail = 0;
$match = 0;
$traceCount = 0;
$lastFail = 'start';
// iterate stdout
while (($str = fgets($pipes[1], 4096)) != null) {
// check for output buffer
if (ob_get_level() == 0) {
ob_start();
}
// fix RDNS XSS (outputs non-breakble space correctly)
$str = htmlspecialchars(trim($str));
// correct output for mtr
if ($type === 'mtr') {
if ($match < 10 && preg_match('/^[0-9]\. /', $str, $string)) {
$str = preg_replace('/^[0-9]\. /', '&nbsp;&nbsp;' . $string[0], $str);
$match++;
} else {
$str = preg_replace('/^[0-9]{2}\. /', '&nbsp;' . substr($str, 0, 4), $str);
}
}
// correct output for traceroute
elseif ($type === 'traceroute') {
if ($match < 10 && preg_match('/^[0-9] /', $str, $string)) {
$str = preg_replace('/^[0-9] /', '&nbsp;' . $string[0], $str);
$match++;
}
// check for consecutive failed hops
if (strpos($str, '* * *') !== false) {
$fail++;
if ($lastFail !== 'start'
&& ($traceCount - 1) === $lastFail
&& $fail >= $failCount
) {
echo str_pad($str . '<br />-- Traceroute timed out --<br />', 4096, ' ', STR_PAD_RIGHT);
break;
}
$lastFail = $traceCount;
}
$traceCount++;
}
// pad string for live output
echo str_pad($str . '<br />', 4096, ' ', STR_PAD_RIGHT);
// flush output buffering
@ob_flush();
flush();
}
// iterate stderr
while (($err = fgets($pipes[2], 4096)) != null) {
// check for IPv6 hostname passed to IPv4 command, and vice versa
if (strpos($err, 'Name or service not known') !== false || strpos($err, 'unknown host') !== false) {
echo 'Unauthorized request';
break;
}
}
$status = proc_get_status($process);
if ($status['running'] == true) {
// close pipes that are still open
foreach ($pipes as $pipe) {
fclose($pipe);
}
// retrieve parent pid
$ppid = $status['pid'];
// use ps to get all the children of this process
$pids = preg_split('/\s+/', `ps -o pid --no-heading --ppid $ppid`);
// kill remaining processes
foreach($pids as $pid) {
if (is_numeric($pid)) {
posix_kill($pid, 9);
}
}
proc_close($process);
}
return true;
}
}

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# Looking Glass
Modern, simple and fresh looking glass based on Bootstrap 5 and PHP 7. A looking glass is a network utility which is
made user-friendly for everyone to use. It allows you to execute network related commands within a remote network, usually that of an ISP.
![](screenshot.png)
### Demo
[See it in action here!](https://lg-nl-oum.hybula.net/)
### Features
- Bootstrap 5 UI.
- Real time command output using JavaScript.
- Supports ping/ping6, traceroute/traceroute6 and mtr/mtr6.
- Easy to customize and to configure.
- DNS checking to prevent unnecessary executions.
### Requirements
- Any Linux distribution, this has been tested on RHEL.
- PHP 7.1 or higher.
- IPv6 connectivity if you want to use the v6 equivalents.
- Root access.
### Installatio
nFor this installation we will assume that we are working on AlmaLinux 8 OS. Warning: This guide does not cover any security hardening or rate limiting.
1. Install the required network tools: `dnf install mtr traceroute -y`.
2. Install the web server with PHP (by default it will install 7.2): `dnf install httpd mod_ssl php -y`.
3. Enable and start Apache/PHP-FPM: `systemctl enable httpd; systemctl enable php-fpm` and `systemctl start httpd; systemctl start php-fpm`.
4. Let's help MTR to work, execute the following command: `ln -s /usr/sbin/mtr /usr/bin/mtr` and also mtr helper called mtr-packet: `ln -s /usr/sbin/mtr-packet /usr/bin/mtr-packet`.
5. You *must* configure SELinux before this all works, or you can disable SELinux using `setenforce 0` and possibly make it permanent: `nano /etc/selinux/config` change to `SELINUX=disabled`.
6. Upload the contents of the ZIP to /var/www/html/.
7. Rename config.dist.php to config.php and adjust the settings.
8. (Optional) You might want to enable SSL using LetsEncrypt, take a look at [acme.sh](https://github.com/acmesh-official/acme.sh).
### Customization
If you open up config.dist.php you will see that there are some features that allows you to customize the looking glass, this includes a custom CSS override.
You may also extend the looking glass with a custom block.
### TODO
- Move to Composer;
- Software-based rate limiting;
- Implement a template engine, for advanced customization;
- Switch to WebSockets.
### License
Mozilla Public License Version 2.0

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<?php
/**
* Hybula Looking Glass
*
* Does the actual backend work for executed commands.
*
* @copyright 2022 Hybula B.V.
* @license Mozilla Public License 2.0
* @version 0.1
* @since File available since release 0.1
* @link https://github.com/hybula/lookingglass
*/
declare(strict_types=1);
require __DIR__.'/config.php';
require __DIR__.'/LookingGlass.php';
use Hybula\LookingGlass;
LookingGlass::validateConfig();
LookingGlass::startSession();
if ($_SESSION['TARGET'] && $_SESSION['METHOD']) {
switch ($_SESSION['METHOD']) {
case 'ping':
LookingGlass::ping($_SESSION['TARGET']);
break;
case 'ping6':
LookingGlass::ping6($_SESSION['TARGET']);
break;
case 'mtr':
LookingGlass::mtr($_SESSION['TARGET']);
break;
case 'mtr6':
LookingGlass::mtr6($_SESSION['TARGET']);
break;
case 'traceroute':
LookingGlass::traceroute($_SESSION['TARGET']);
break;
case 'traceroute6':
LookingGlass::traceroute6($_SESSION['TARGET']);
break;
}
}

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<?php
declare(strict_types=1);
// Define the HTML title;
const LG_TITLE = 'Looking Glass';
// Define a logo, this can be HTML too, see the other example for an image;
const LG_LOGO = '<h2>Company Looking Glass</h2>';
// Define the URL where the logo points to;
const LG_LOGO_URL = 'https://github.com/hybula/lookingglass/';
// Define a custom CSS file which can be used to style the LG, set false to disable, else point to the CSS file;
const LG_CSS_OVERRIDES = false;
// Enable or disable blocks/parts of the LG, set false to hide a part;
const LG_BLOCK_NETWORK = true;
const LG_BLOCK_LOOKINGGLAS = true;
const LG_BLOCK_SPEEDTEST = true;
// This enables the custom block, which you can use to add something custom to the LG;
const LG_BLOCK_CUSTOM = false;
// Define a file here which will be used to display the custom block, can be PHP too which outputs HTML;
const LG_CUSTOM_HTML = __DIR__.'/custom.html.php';
// Define a file here which will be loaded on top of the index file, this can be used to do some post logic;
const LG_CUSTOM_PHP = __DIR__.'/custom.post.php';
// Define the location of this network, usually a city and a country;
const LG_LOCATION = 'Amsterdam, Netherlands';
// Define the facility where the network is located, usually a data center;
const LG_FACILITY = 'Nikhef';
// Define a direct link to more information about the facility, this should be a link to PeeringDB;
const LG_FACILITY_URL = 'https://www.peeringdb.com/fac/18';
// Define an IPv4 for testing;
const LG_IPV4 = '127.0.0.1';
// Define an IPv6 for testing;
const LG_IPV6 = '::1';
// Define the methods that can be used by visitors to test it out;
const LG_METHODS = ['ping', 'ping6', 'mtr', 'mtr6', 'traceroute', 'traceroute6'];
// Define other looking glasses, this is useful if you have multiple networks and looking glasses;
const LG_LOCATIONS = [
'Location A' => 'https://github.com/hybula/lookingglass/',
'Location B' => 'https://github.com/hybula/lookingglass/',
'Location C' => 'https://github.com/hybula/lookingglass/',
];
// Enable the iPerf info inside the speedtest block, set to false to disable;
const LG_SPEEDTEST_IPERF = true;
// Define the label of an incoming iPerf test;
const LG_SPEEDTEST_LABEL_INCOMING = 'iPerf3 Incoming';
// Define the command to use to test incoming speed using iPerf, preferable iPerf3;
const LG_SPEEDTEST_CMD_INCOMING = 'iperf3 -4 -c hostname -p 5201 -P 4';
// Define the label of an outgoing iPerf test;
const LG_SPEEDTEST_LABEL_OUTGOING = 'iPerf3 Outgoing';
// Define the command to use to test outgoing speed using iPerf, preferable iPerf3;
const LG_SPEEDTEST_CMD_OUTGOING = 'iperf3 -4 -c hostname -p 5201 -P 4 -R';
// Define speedtest files with URLs to the actual files;
const LG_SPEEDTEST_FILES = [
'100M' => 'https://github.com/hybula/lookingglass/',
'1G' => 'https://github.com/hybula/lookingglass/',
'10G' => 'https://github.com/hybula/lookingglass/'
];
// Define if you require visitors to agree with the Terms, set false to disable;
const LG_TERMS = 'https://github.com/hybula/lookingglass/';

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<?php
/**
* Hybula Looking Glass
*
* Provides UI and input for the looking glass backend.
*
* @copyright 2022 Hybula B.V.
* @license Mozilla Public License 2.0
* @version 0.1
* @since File available since release 0.1
* @link https://github.com/hybula/lookingglass
*/
declare(strict_types=1);
require __DIR__.'/config.php';
require __DIR__.'/LookingGlass.php';
use Hybula\LookingGlass;
LookingGlass::validateConfig();
LookingGlass::startSession();
$detectIpAddress = LookingGlass::detectIpAddress();
if (!empty($_POST)) {
do {
if (!isset($_POST['csrfToken']) || ($_POST['csrfToken'] != $_SESSION['CSRF'])) {
$errorMessage = 'Missing or incorrect CSRF token.';
break;
}
if (isset($_POST['submitForm'])) {
if (!in_array($_POST['backendMethod'], LG_METHODS)) {
$errorMessage = 'Unsupported backend method.';
break;
}
$_SESSION['METHOD'] = $_POST['backendMethod'];
$_SESSION['TARGET'] = $_POST['targetHost'];
if (!isset($_POST['checkTerms']) && LG_TERMS) {
$errorMessage = 'You must agree with the Terms of Service.';
break;
}
if (in_array($_POST['backendMethod'], ['ping', 'mtr', 'traceroute'])) {
if (!LookingGlass::isValidIpv4($_POST['targetHost'])) {
$targetHost = LookingGlass::isValidHost($_POST['targetHost'], 'ipv4');
if (!$targetHost) {
$errorMessage = 'No valid IPv4 provided.';
break;
}
$_SESSION['TARGET'] = $targetHost;
}
}
if (in_array($_POST['backendMethod'], ['ping6', 'mtr6', 'traceroute6'])) {
if (!LookingGlass::isValidIpv6($_POST['targetHost'])) {
$targetHost = LookingGlass::isValidHost($_POST['targetHost'], 'ipv6');
if (!$targetHost) {
$errorMessage = 'No valid IPv6 provided.';
break;
}
$_SESSION['TARGET'] = $targetHost;
}
}
$_SESSION['TERMS'] = true;
$callBackend = true;
break;
}
$errorMessage = 'Unsupported POST received.';
break;
} while (true);
}
$_SESSION['CSRF'] = bin2hex(random_bytes(12));
if (LG_BLOCK_CUSTOM) {
include LG_CUSTOM_PHP;
}
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta content="width=device-width, initial-scale=1" name="viewport">
<meta content="" name="description">
<meta content="Hybula" name="author">
<title><?php echo LG_TITLE; ?></title>
<link crossorigin="anonymous" href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" rel="stylesheet">
<?php if (LG_CSS_OVERRIDES) { echo '<link href="'.LG_CSS_OVERRIDES.'" rel="stylesheet">'; } ?>
</head>
<body>
<div class="col-lg-6 mx-auto p-3 py-md-5">
<header class="d-flex align-items-center pb-3 mb-5 border-bottom">
<div class="col-8">
<a class="d-flex align-items-center text-dark text-decoration-none" href="<?php echo LG_LOGO_URL; ?>" target="_blank">
<?php echo LG_LOGO; ?>
</a>
</div>
<div class="col-4 float-end">
<select class="form-select" onchange="window.location = this.options[this.selectedIndex].value">
<option selected><?php echo LG_LOCATION; ?></option>
<?php foreach (LG_LOCATIONS as $location => $link) { ?>
<option value="<?php echo $link; ?>"><?php echo $location; ?></option>
<?php } ?>
</select>
</div>
</header>
<main>
<?php if (LG_BLOCK_NETWORK) { ?>
<div class="row mb-5">
<div class="card shadow-lg">
<div class="card-body p-3">
<h1 class="fs-4 card-title mb-4">Network</h1>
<div class="row mb-3">
<div class="col-md-7">
<label class="mb-2 text-muted">Location</label>
<div class="input-group mb-3">
<input type="text" class="form-control" value="<?php echo LG_LOCATION; ?>" onfocus="this.select()" readonly="">
<a class="btn btn-outline-secondary" href="https://www.openstreetmap.org/search?query=<?php echo urlencode(LG_LOCATION); ?>" target="_blank">Map</a>
<?php if (!empty(LG_LOCATIONS)) { ?>
<button class="btn btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">Locations</button>
<ul class="dropdown-menu dropdown-menu-end">
<?php foreach (LG_LOCATIONS as $location => $link) { ?>
<li><a class="dropdown-item" href="<?php echo $link; ?>"><?php echo $location; ?></a></li>
<?php } ?>
</ul>
<?php } ?>
</div>
</div>
<div class="col-md-5">
<label class="mb-2 text-muted">Facility</label>
<div class="input-group">
<input type="text" class="form-control" value="<?php echo LG_FACILITY; ?>" onfocus="this.select()" readonly="">
<a href="<?php echo LG_FACILITY_URL; ?>" class="btn btn-outline-secondary" target="_blank">PeeringDB</a>
</div>
</div>
</div>
<div class="row mb-3">
<div class="col-md-3">
<label class="mb-2 text-muted">Test IPv4</label>
<div class="input-group">
<input type="text" class="form-control" value="<?php echo LG_IPV4; ?>" onfocus="this.select()" readonly="">
<button class="btn btn-outline-secondary" onclick="copyToClipboard('<?php echo LG_IPV4; ?>', this)">Copy</button>
</div>
</div>
<div class="col-md-5">
<label class="mb-2 text-muted">Test IPv6</label>
<div class="input-group">
<input type="text" class="form-control" value="<?php echo LG_IPV6; ?>" onfocus="this.select()" readonly="">
<button class="btn btn-outline-secondary" onclick="copyToClipboard('<?php echo LG_IPV6; ?>', this)">Copy</button>
</div>
</div>
<div class="col-md-4">
<label class="mb-2 text-muted">Your IP</label>
<div class="input-group">
<input type="text" class="form-control" value="<?php echo $detectIpAddress; ?>" onfocus="this.select()" readonly="">
<button class="btn btn-outline-secondary" onclick="copyToClipboard('<?php echo $detectIpAddress; ?>', this)">Copy</button>
</div>
</div>
</div>
</div>
</div>
</div>
<?php } ?>
<?php if (LG_BLOCK_LOOKINGGLAS) { ?>
<div class="row pb-5">
<div class="card shadow-lg">
<div class="card-body p-3">
<h1 class="fs-4 card-title mb-4">Looking Glass</h1>
<form method="POST" action="/" autocomplete="off">
<input type="hidden" name="csrfToken" value="<?php echo $_SESSION['CSRF']; ?>">
<div class="row">
<div class="col-md-7 mb-3">
<div class="input-group">
<span class="input-group-text" id="basic-addon1">Target</span>
<input type="text" class="form-control" placeholder="IP address or host..." name="targetHost" value="<?php if (isset($_SESSION['TARGET'])) { echo $_SESSION['TARGET']; } ?>" required="">
</div>
</div>
<div class="col-md-5 mb-3">
<div class="input-group">
<label class="input-group-text">Method</label>
<select class="form-select" name="backendMethod" id="backendMethod">
<?php foreach (LG_METHODS as $method) { ?>
<option value="<?php echo $method; ?>"<?php if (isset($_SESSION['METHOD']) && $_SESSION['METHOD'] == $method) { echo 'selected'; } ?>><?php echo $method; ?></option>
<?php } ?>
</select>
</div>
</div>
</div>
<div class="d-flex align-items-center">
<?php if (LG_TERMS) { ?>
<div class="form-check">
<input type="checkbox" id="checkTerms" name="checkTerms" class="form-check-input"<?php if (isset($_SESSION['TERMS'])) { echo 'checked'; } ?>>
<label for="checkTerms" class="form-check-label">I agree with the <a href="<?php echo LG_TERMS; ?>" target="_blank">Terms of Use</a></label>
</div>
<?php } ?>
<button type="submit" class="btn btn-primary ms-auto" id="executeButton" name="submitForm">
Execute
</button>
</div>
<?php if (isset($errorMessage)) echo '<div class="alert alert-danger mt-3" role="alert">'.$errorMessage.'</div>'; ?>
<div class="card card-body bg-light mt-4" style="display: none;" id="outputCard">
<pre id="outputContent" style="overflow: hidden; white-space: pre; word-wrap: normal;"></pre>
</div>
</form>
</div>
</div>
</div>
<?php } ?>
<?php if (LG_BLOCK_SPEEDTEST) { ?>
<div class="row pb-5">
<div class="card shadow-lg">
<div class="card-body p-3">
<h1 class="fs-4 card-title mb-4">Speedtest</h1>
<?php if (LG_SPEEDTEST_IPERF) { ?>
<div class="row mb-3">
<div class="col-md-6">
<label class="mb-2 text-muted"><?php echo LG_SPEEDTEST_LABEL_INCOMING; ?></label>
<p><code><?php echo LG_SPEEDTEST_CMD_INCOMING; ?></code></p>
<button class="btn btn-sm btn-outline-secondary" onclick="copyToClipboard('<?php echo LG_SPEEDTEST_CMD_INCOMING; ?>', this)">Copy</button>
</div>
<div class="col-md-6">
<label class="mb-2 text-muted"><?php echo LG_SPEEDTEST_LABEL_OUTGOING; ?></label>
<p><code><?php echo LG_SPEEDTEST_CMD_OUTGOING; ?></code></p>
<button class="btn btn-sm btn-outline-secondary" onclick="copyToClipboard('<?php echo LG_SPEEDTEST_CMD_OUTGOING; ?>', this)">Copy</button>
</div>
</div>
<?php } ?>
<div class="row">
<label class="mb-2 text-muted">Test Files</label>
<div class="btn-group input-group mb-3">
<?php foreach (LG_SPEEDTEST_FILES as $file => $link) { ?>
<a href="<?php echo $link; ?>" class="btn btn-outline-secondary"><?php echo $file; ?></a>
<?php } ?>
</div>
</div>
</div>
</div>
</div>
<?php } ?>
<?php if (LG_BLOCK_CUSTOM) { include LG_CUSTOM_HTML; } ?>
</main>
<footer class="pt-3 mt-5 my-5 text-muted border-top">
Powered by <a href="https://github.com/hybula/lookingglass" target="_blank">Hybula Looking Glass</a>
<a href="https://github.com/hybula/lookingglass" target="_blank" class="float-end"><img src="https://img.shields.io/github/watchers/hybula/lookingglass?style=social" alt="GitHub Watchers"></a>
</footer>
</div>
<script type="text/javascript">
<?php if (isset($callBackend)) { echo 'callBackend();'; } ?>
function callBackend() {
const executeButton = document.getElementById('executeButton');
executeButton.innerText = 'Executing...';
executeButton.disabled = true;
document.getElementById('outputCard').style.display = 'inherit';
const xhr = new XMLHttpRequest();
xhr.onreadystatechange = function () {
document.getElementById('outputContent').innerHTML = this.responseText.replace(/<br \/> +/g, '<br />');
if (this.readyState === XMLHttpRequest.DONE) {
executeButton.innerText = 'Execute';
executeButton.disabled = false;
console.log('Backend ready!');
}
};
xhr.open('GET', 'backend.php', true);
xhr.send();
}
</script>
<script type="text/javascript">
async function copyToClipboard(text, button) {
button.innerHTML = 'Copied!';
const textAreaObject = document.createElement('textarea');
textAreaObject.value = text;
document.body.appendChild(textAreaObject);
textAreaObject.select();
document.execCommand('copy');
document.body.removeChild(textAreaObject);
await new Promise(r => setTimeout(r, 2000));
button.innerHTML = 'Copy';
}
</script>
<script crossorigin="anonymous" integrity="sha384-ka7Sk0Gln4gmtz2MlQnikT1wXgYsOg+OMhuP+IlRH9sENBO0LRn5q+8nbTov4+1p" src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.bundle.min.js"></script>
</body>
</html>

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