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<?php
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/*
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	diag_testport.php
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	Copyright (C) 2013 Jim P (jimp@pfsense.org)
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	Copyright (C) 2013-2015 Electric Sheep Fencing, LP
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	All rights reserved.
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	Portions based on diag_ping.php
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	part of m0n0wall (http://m0n0.ch/wall)
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	Copyright (C) 2003-2005 Bob Zoller (bob@kludgebox.com) and Manuel Kasper <mk@neon1.net>.
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	All rights reserved.
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	Redistribution and use in source and binary forms, with or without
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	modification, are permitted provided that the following conditions are met:
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	1. Redistributions of source code must retain the above copyright notice,
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	this list of conditions and the following disclaimer.
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	2. Redistributions in binary form must reproduce the above copyright
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	notice, this list of conditions and the following disclaimer in the
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	documentation and/or other materials provided with the distribution.
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	THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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	INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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	AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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	AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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	OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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	POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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	pfSense_BUILDER_BINARIES:	/usr/bin/nc
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	pfSense_MODULE:	routing
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*/
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##|+PRIV
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##|*IDENT=page-diagnostics-testport
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##|*NAME=Diagnostics: Test Port
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##|*DESCR=Allow access to the 'Diagnostics: Test Port' page.
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##|*MATCH=diag_testport.php*
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##|-PRIV
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$allowautocomplete = true;
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$pgtitle = array(gettext("Diagnostics"), gettext("Test Port"));
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require("guiconfig.inc");
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define('NC_TIMEOUT', 10);
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$do_testport = false;
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if ($_POST || $_REQUEST['host']) {
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	unset($input_errors);
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	/* input validation */
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	$reqdfields = explode(" ", "host port");
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	$reqdfieldsn = array(gettext("Host"),gettext("Port"));
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	do_input_validation($_REQUEST, $reqdfields, $reqdfieldsn, $input_errors);
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	if (!is_ipaddr($_REQUEST['host']) && !is_hostname($_REQUEST['host'])) {
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		$input_errors[] = gettext("Please enter a valid IP or hostname.");
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	}
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	if (!is_port($_REQUEST['port'])) {
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		$input_errors[] = gettext("Please enter a valid port number.");
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	}
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	if (($_REQUEST['srcport'] != "") && (!is_numeric($_REQUEST['srcport']) || !is_port($_REQUEST['srcport']))) {
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		$input_errors[] = gettext("Please enter a valid source port number, or leave the field blank.");
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	}
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	if (is_ipaddrv4($_REQUEST['host']) && ($_REQUEST['ipprotocol'] == "ipv6")) {
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		$input_errors[] = gettext("You cannot connect to an IPv4 address using IPv6.");
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	}
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	if (is_ipaddrv6($_REQUEST['host']) && ($_REQUEST['ipprotocol'] == "ipv4")) {
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		$input_errors[] = gettext("You cannot connect to an IPv6 address using IPv4.");
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	}
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	if (!$input_errors) {
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		$do_testport = true;
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		$timeout = NC_TIMEOUT;
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	}
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	/* Save these request vars even if there were input errors. Then the fields are refilled for the user to correct. */
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	$host = $_REQUEST['host'];
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	$sourceip = $_REQUEST['sourceip'];
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	$port = $_REQUEST['port'];
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	$srcport = $_REQUEST['srcport'];
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	$showtext = isset($_REQUEST['showtext']);
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	$ipprotocol = $_REQUEST['ipprotocol'];
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}
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include("head.inc"); ?>
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<body link="#0000CC" vlink="#0000CC" alink="#0000CC">
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<?php include("fbegin.inc"); ?>
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<table width="100%" border="0" cellpadding="0" cellspacing="0" summary="diag test port">
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<tr><td>
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<?php echo gettext("This page allows you to perform a simple TCP connection test to determine if a host is up and accepting connections on a given port. This test does not function for UDP since there is no way to reliably determine if a UDP port accepts connections in this manner."); ?>
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<br /><br />
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<?php echo gettext("No data is transmitted to the remote host during this test, it will only attempt to open a connection and optionally display the data sent back from the server."); ?>
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<br /><br /><br />
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<?php if ($input_errors) print_input_errors($input_errors); ?>
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	<form action="diag_testport.php" method="post" name="iform" id="iform">
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	<table width="100%" border="0" cellpadding="6" cellspacing="0" summary="main area">
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		<tr>
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			<td colspan="2" valign="top" class="listtopic"><?=gettext("Test Port"); ?></td>
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		</tr>
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		<tr>
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			<td width="22%" valign="top" class="vncellreq"><?=gettext("Host"); ?></td>
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			<td width="78%" class="vtable">
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			<?=$mandfldhtml;?>
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			<input name="host" type="text" class="formfld unknown" id="host" size="20" value="<?=htmlspecialchars($host);?>" /></td>
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		</tr>
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		<tr>
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			<td width="22%" valign="top" class="vncellreq"><?= gettext("Port"); ?></td>
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			<td width="78%" class="vtable">
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				<input name="port" type="text" class="formfld unknown" id="port" size="10" value="<?=htmlspecialchars($port);?>" />
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			</td>
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		</tr>
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		<tr>
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			<td width="22%" valign="top" class="vncell"><?= gettext("Source Port"); ?></td>
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			<td width="78%" class="vtable">
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				<input name="srcport" type="text" class="formfld unknown" id="srcport" size="10" value="<?=htmlspecialchars($srcport);?>" />
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				<br /><br /><?php echo gettext("This should typically be left blank."); ?>
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			</td>
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		</tr>
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		<tr>
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			<td width="22%" valign="top" class="vncell"><?= gettext("Show Remote Text"); ?></td>
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			<td width="78%" class="vtable">
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				<input name="showtext" type="checkbox" id="showtext" <?php if ($showtext) echo "checked=\"checked\"" ?> />
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				<br /><br /><?php echo gettext("Shows the text given by the server when connecting to the port. Will take 10+ seconds to display if checked."); ?>
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			</td>
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		</tr>
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		<tr>
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			<td width="22%" valign="top" class="vncell"><?=gettext("Source Address"); ?></td>
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			<td width="78%" class="vtable">
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				<select name="sourceip" class="formselect">
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					<option value="">Any</option>
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				<?php   $sourceips = get_possible_traffic_source_addresses(true);
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					foreach ($sourceips as $sip):
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						$selected = "";
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						if (!link_interface_to_bridge($sip['value']) && ($sip['value'] == $sourceip))
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							$selected = "selected=\"selected\"";
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				?>
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					<option value="<?=$sip['value'];?>" <?=$selected;?>>
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						<?=htmlspecialchars($sip['name']);?>
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					</option>
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					<?php endforeach; ?>
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				</select>
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			</td>
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		</tr>
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		<tr>
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			<td width="22%" valign="top" class="vncell"><?=gettext("IP Protocol"); ?></td>
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			<td width="78%" class="vtable">
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			<select name="ipprotocol" class="formfld">
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				<option value="any" <?php if ("any" == $ipprotocol) echo "selected=\"selected\""; ?>>
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					Any
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				</option>
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				<option value="ipv4" <?php if ($ipprotocol == "ipv4") echo "selected=\"selected\""; ?>>
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					<?=gettext("IPv4");?>
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				</option>
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				<option value="ipv6" <?php if ($ipprotocol == "ipv6") echo "selected=\"selected\""; ?>>
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					<?=gettext("IPv6");?>
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				</option>
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			</select>
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			<br /><br />
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			<?php echo gettext("If you force IPv4 or IPv6 and use a hostname that does not contain a result using that protocol, it will result in an error. For example if you force IPv4 and use a hostname that only returns an AAAA IPv6 IP address, it will not work."); ?>
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			</td>
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		</tr>
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		<tr>
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			<td width="22%" valign="top">&nbsp;</td>
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			<td width="78%">
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				<input name="Submit" type="submit" class="formbtn" value="<?=gettext("Test"); ?>" />
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			</td>
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		</tr>
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		<tr>
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		<td valign="top" colspan="2">
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		<?php if ($do_testport) {
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			echo "<font face=\"terminal\" size=\"2\">";
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			echo "<strong>" . gettext("Port Test Results") . ":</strong><br />";
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		?>
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			<script type="text/javascript">
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			//<![CDATA[
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			window.onload=function(){
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				document.getElementById("testportCaptured").wrap='off';
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			}
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			//]]>
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			</script>
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		<?php
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			echo "<textarea id=\"testportCaptured\" style=\"width:98%\" name=\"code\" rows=\"15\" cols=\"66\" readonly=\"readonly\">";
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			$result = "";
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			$nc_base_cmd = "/usr/bin/nc";
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			$nc_args = "-w " . escapeshellarg($timeout);
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			if (!$showtext)
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				$nc_args .= " -z ";
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			if (!empty($srcport))
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				$nc_args .= " -p " . escapeshellarg($srcport) . " ";
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			/* Attempt to determine the interface address, if possible. Else try both. */
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			if (is_ipaddrv4($host)) {
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				$ifaddr = ($sourceip == "any") ? "" : get_interface_ip($sourceip);
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				$nc_args .= " -4";
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			} elseif (is_ipaddrv6($host)) {
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				if ($sourceip == "any")
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					$ifaddr = "";
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				else if (is_linklocal($sourceip))
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					$ifaddr = $sourceip;
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				else
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					$ifaddr = get_interface_ipv6($sourceip);
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				$nc_args .= " -6";
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			} else {
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				switch ($ipprotocol) {
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					case "ipv4":
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						$ifaddr = get_interface_ip($sourceip);
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						$nc_ipproto = " -4";
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						break;
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					case "ipv6":
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						$ifaddr = (is_linklocal($sourceip) ? $sourceip : get_interface_ipv6($sourceip));
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						$nc_ipproto = " -6";
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						break;
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					case "any":
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						$ifaddr = get_interface_ip($sourceip);
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						$nc_ipproto = (!empty($ifaddr)) ? " -4" : "";
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						if (empty($ifaddr)) {
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							$ifaddr = (is_linklocal($sourceip) ? $sourceip : get_interface_ipv6($sourceip));
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							$nc_ipproto = (!empty($ifaddr)) ? " -6" : "";
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						}
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						break;
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				}
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				/* Netcat doesn't like it if we try to connect using a certain type of IP without specifying the family. */
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				if (!empty($ifaddr)) {
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					$nc_args .= $nc_ipproto;
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				} elseif ($sourceip == "any") {
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					switch ($ipprotocol) {
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						case "ipv4":
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							$nc_ipproto = " -4";
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							break;
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						case "ipv6":
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							$nc_ipproto = " -6";
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							break;
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					}
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					$nc_args .= $nc_ipproto;
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				}
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			}
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			/* Only add on the interface IP if we managed to find one. */
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			if (!empty($ifaddr)) {
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				$nc_args .= " -s " . escapeshellarg($ifaddr) . " ";
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				$scope = get_ll_scope($ifaddr);
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				if (!empty($scope) && !strstr($host, "%"))
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					$host .= "%{$scope}";
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			}
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			$nc_cmd = "{$nc_base_cmd} {$nc_args} " . escapeshellarg($host) . " " . escapeshellarg($port) . " 2>&1";
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			exec($nc_cmd, $result, $retval);
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			//echo "NC CMD: {$nc_cmd}\n\n";
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			if (empty($result)) {
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				if ($showtext)
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					echo gettext("No output received, or connection failed. Try with \"Show Remote Text\" unchecked first.");
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				else
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					echo gettext("Connection failed (Refused/Timeout)");
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			} else {
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				if (is_array($result)) {
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					foreach ($result as $resline) {
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						echo htmlspecialchars($resline) . "\n";
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					}
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				} else {
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					echo htmlspecialchars($result);
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				}
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			}
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			echo '</textarea>&nbsp;</font>' ;
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		}
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		?>
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		</td>
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		</tr>
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	</table>
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</form>
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</td></tr></table>
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<?php include("fend.inc"); ?>
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</body>
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</html>
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