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<?php
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/*
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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: /bin/ps /usr/bin/grep /usr/sbin/tcpdump
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pfSense_MODULE: routing
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*/
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##|+PRIV
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##|*IDENT=page-diagnostics-packetcapture
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##|*NAME=Diagnostics: Packet Capture page
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##|*DESCR=Allow access to the 'Diagnostics: Packet Capture' page.
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##|*MATCH=diag_packet_capture.php*
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##|-PRIV
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$pgtitle = array(gettext("Diagnostics"), gettext("Packet Capture"));
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require_once("guiconfig.inc");
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require_once("pfsense-utils.inc");
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$fp = "/root/";
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$fn = "packetcapture.cap";
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$snaplen = 0;//default packet length
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$count = 100;//default number of packets to capture
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if ($_POST) {
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$do_tcpdump = true;
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$host = $_POST['host'];
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$selectedif = $_POST['interface'];
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$count = $_POST['count'];
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$packetlength = $_POST['snaplen'];
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$port = $_POST['port'];
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$detail = $_POST['detail'];
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$fam = $_POST['fam'];
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conf_mount_rw();
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if ($_POST['dnsquery']) {
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//if dns lookup is checked
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$disabledns = "";
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} else {
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//if dns lookup is unchecked
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$disabledns = "-n";
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}
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if ($_POST['startbtn'] != "" ) {
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$action = gettext("Start");
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//delete previous packet capture if it exists
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if (file_exists($fp.$fn))
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unlink ($fp.$fn);
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} elseif ($_POST['stopbtn']!= "") {
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$action = gettext("Stop");
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$processes_running = trim(shell_exec("/bin/ps axw -O pid= | /usr/bin/grep tcpdump | /usr/bin/grep {$fn} | /usr/bin/egrep -v '(pflog|grep)'"));
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//explode processes into an array, (delimiter is new line)
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$processes_running_array = explode("\n", $processes_running);
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//kill each of the packetcapture processes
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foreach ($processes_running_array as $process) {
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$process_id_pos = strpos($process, ' ');
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$process_id = substr($process, 0, $process_id_pos);
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exec("kill $process_id");
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}
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} else {
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//download file
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$fs = filesize($fp.$fn);
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header("Content-Type: application/octet-stream");
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header("Content-Disposition: attachment; filename=$fn");
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header("Content-Length: $fs");
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readfile($fp.$fn);
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}
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} else {
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$do_tcpdump = false;
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}
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include("head.inc"); ?>
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<body link="#000000" vlink="#0000CC" alink="#0000CC">
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<?php
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include("fbegin.inc");
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?>
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<table width="100%" border="0" cellpadding="0" cellspacing="0">
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<tr>
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<td>
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<form action="diag_packet_capture.php" method="post" name="iform" id="iform">
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<table width="100%" border="0" cellpadding="6" cellspacing="0">
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<tr>
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<td colspan="2" valign="top" class="listtopic"><?=gettext("Packet capture");?></td>
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</tr>
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<tr>
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<td width="17%" valign="top" class="vncellreq"><?=gettext("Interface");?></td>
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<td width="83%" class="vtable">
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<select name="interface">
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<?php
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$interfaces = get_configured_interface_with_descr();
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if (isset($config['ipsec']['enable']))
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$interfaces['ipsec'] = "IPsec";
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foreach (array('server', 'client') as $mode) {
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if (is_array($config['openvpn']["openvpn-{$mode}"])) {
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foreach ($config['openvpn']["openvpn-{$mode}"] as $id => $setting) {
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if (!isset($setting['disable'])) {
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$interfaces['ovpn' . substr($mode, 0, 1) . $setting['vpnid']] = gettext("OpenVPN") . " ".$mode.": ".htmlspecialchars($setting['description']);
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}
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}
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}
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}
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foreach ($interfaces as $iface => $ifacename): ?>
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<option value="<?=$iface;?>" <?php if ($selectedif == $iface) echo "selected"; ?>>
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<?php echo $ifacename;?>
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</option>
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<?php endforeach;?>
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</select>
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<br/><?=gettext("Select the interface on which to capture traffic.");?>
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</td>
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</tr>
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<tr>
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<td width="17%" valign="top" class="vncellreq"><?=gettext("Address Family");?></td>
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<td width="83%" class="vtable">
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<select name="fam">
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<option value="">Any</option>
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<option value="ip" <?php if ($fam == "ip") echo "selected"; ?>>IPv4 Only</option>
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<option value="ip6" <?php if ($fam == "ip6") echo "selected"; ?>>IPv6 Only</option>
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</select>
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<br/><?=gettext("Select the type of traffic to be captured, either Any, IPv4 only or IPv6 only.");?>
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</td>
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</tr>
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<tr>
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<td width="17%" valign="top" class="vncellreq"><?=gettext("Host Address");?></td>
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<td width="83%" class="vtable">
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<input name="host" type="text" class="formfld host" id="host" size="20" value="<?=htmlspecialchars($host);?>">
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<br/><?=gettext("This value is either the Source or Destination IP address or subnet in CIDR notation. The packet capture will look for this address in either field.");?>
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<br/><?=gettext("This value can be a domain name or IP address, or subnet in CIDR notation.");?>
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<br/><?=gettext("If you leave this field blank, all packets on the specified interface will be captured.");?>
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</td>
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</tr>
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<tr>
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<td width="17%" valign="top" class="vncellreq"><?=gettext("Port");?></td>
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<td width="83%" class="vtable">
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<input name="port" type="text" class="formfld unknown" id="port" size="5" value="<?=$port;?>">
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<br/><?=gettext("The port can be either the source or destination port. The packet capture will look for this port in either field.");?>
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<br/><?=gettext("Leave blank if you do not want to filter by port.");?>
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</td>
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</tr>
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<tr>
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<td width="17%" valign="top" class="vncellreq"><?=gettext("Packet Length");?></td>
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<td width="83%" class="vtable">
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<input name="snaplen" type="text" class="formfld unknown" id="snaplen" size="5" value="<?=$snaplen;?>">
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<br/><?=gettext("The Packet length is the number of bytes of each packet that will be captured. Default value is 0, which will capture the entire frame regardless of its size.");?>
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</td>
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</tr>
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<tr>
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<td width="17%" valign="top" class="vncellreq"><?=gettext("Count");?></td>
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<td width="83%" class="vtable">
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<input name="count" type="text" class="formfld unknown" id="count" size="5" value="<?=$count;?>">
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<br/><?=gettext("This is the number of packets the packet capture will grab. Default value is 100.") . "<br/>" . gettext("Enter 0 (zero) for no count limit.");?>
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</tr>
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<tr>
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<td width="17%" valign="top" class="vncellreq"><?=gettext("Level of Detail");?></td>
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<td width="83%" class="vtable">
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<select name="detail" type="text" class="formselect" id="detail" size="1">
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<option value="-q" <?php if ($detail == "-q") echo "selected"; ?>><?=gettext("Normal");?></option>
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<option value="-v" <?php if ($detail == "-v") echo "selected"; ?>><?=gettext("Medium");?></option>
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<option value="-vv" <?php if ($detail == "-vv") echo "selected"; ?>><?=gettext("High");?></option>
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<option value="-vv -e" <?php if ($detail == "-vv -e") echo "selected"; ?>><?=gettext("Full");?></option>
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</select>
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<br/><?=gettext("This is the level of detail that will be displayed after hitting 'Stop' when the packets have been captured.") . "<br/><b>" .
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gettext("Note:") . "</b> " .
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gettext("This option does not affect the level of detail when downloading the packet capture.");?>
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</tr>
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<tr>
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<td width="17%" valign="top" class="vncellreq"><?=gettext("Reverse DNS Lookup");?></td>
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<td width="83%" class="vtable">
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<input name="dnsquery" type="checkbox"<?php if($_POST['dnsquery']) echo " CHECKED"; ?>>
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<br/><?=gettext("This check box will cause the packet capture to perform a reverse DNS lookup associated with all IP addresses.");?>
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<br/><b><?=gettext("Note");?>: </b><?=gettext("This option can cause delays for large packet captures.");?>
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</td>
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</tr>
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<tr>
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<td width="17%" valign="top"> </td>
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<td width="83%">
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<?php
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/* check to see if packet capture tcpdump is already running */
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$processcheck = (trim(shell_exec("/bin/ps axw -O pid= | /usr/bin/grep tcpdump | /usr/bin/grep {$fn} | /usr/bin/egrep -v '(pflog|grep)'")));
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if ($processcheck != "")
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$processisrunning = true;
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else
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$processisrunning = false;
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if (($action == gettext("Stop") or $action == "") and $processisrunning != true)
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echo "<input type=\"submit\" name=\"startbtn\" value=\"" . gettext("Start") . "\"> ";
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else {
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echo "<input type=\"submit\" name=\"stopbtn\" value=\"" . gettext("Stop") . "\"> ";
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}
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if (file_exists($fp.$fn) and $processisrunning != true) {
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echo "<input type=\"submit\" name=\"downloadbtn\" value=\"" . gettext("Download Capture") . "\">";
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echo " (" . gettext("The packet capture file was last updated:") . " " . date("F jS, Y g:i:s a.", filemtime($fp.$fn)) . ")";
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}
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?>
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</td>
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</tr>
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<tr>
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<td valign="top" colspan="2">
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<?php
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echo "<font face='terminal' size='2'>";
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if ($processisrunning == true)
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echo("<strong>" . gettext("Packet Capture is running.") . "</strong><br/>");
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if ($do_tcpdump) {
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$matches = array();
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if (($fam == "ip6") || ($fam == "ip"))
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$matches[] = $fam;
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if ($port != "")
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$matches[] = "port ".$port;
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if ($host != "") {
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if (is_ipaddr($host))
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$matches[] = "host " . $host;
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elseif (is_subnet($host))
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$matches[] = "net " . $host;
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}
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if ($count != "0" ) {
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$searchcount = "-c " . $count;
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} else {
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$searchcount = "";
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}
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$selectedif = convert_friendly_interface_to_real_interface_name($selectedif);
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if ($action == gettext("Start")) {
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$matchstr = implode($matches, " and ");
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echo("<strong>" . gettext("Packet Capture is running.") . "</strong><br/>");
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mwexec_bg ("/usr/sbin/tcpdump -i $selectedif $searchcount -s $packetlength -w $fp$fn $matchstr");
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// echo "/usr/sbin/tcpdump -i $selectedif $searchcount -s $packetlength -w $fp$fn $matchstr";
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} else {
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//action = stop
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echo("<strong>" . gettext("Packet Capture stopped.") . "<br/><br/>" . gettext("Packets Captured:") . "</strong><br/>");
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?>
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<textarea style="width:98%" name="code" rows="15" cols="66" wrap="off" readonly="readonly">
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<?php
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system ("/usr/sbin/tcpdump $disabledns $detail -r $fp$fn");
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conf_mount_ro();
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?>
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</textarea>
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<?php
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}
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}
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?>
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</td>
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</tr>
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<tr>
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</table>
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</form>
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</td>
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</tr>
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</table>
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<?php
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include("fend.inc");
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?>
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