summaryrefslogtreecommitdiffstats
path: root/usr/local/www/diag_packet_capture.php
blob: 0566e739668d58e097a5c65318ce5fa902539959 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
<?php
/*

	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.
*/

/*
	pfSense_BUILDER_BINARIES:	/bin/ps	/usr/bin/grep	/usr/sbin/tcpdump
	pfSense_MODULE:	routing
*/

##|+PRIV
##|*IDENT=page-diagnostics-packetcapture
##|*NAME=Diagnostics: Packet Capture page
##|*DESCR=Allow access to the 'Diagnostics: Packet Capture' page.
##|*MATCH=diag_packet_capture.php*
##|-PRIV

$allowautocomplete = true;

if ($_POST['downloadbtn'] == gettext("Download Capture"))
	$nocsrf = true;

$pgtitle = array(gettext("Diagnostics"), gettext("Packet Capture"));
require_once("guiconfig.inc");
require_once("pfsense-utils.inc");

$fp = "/root/";
$fn = "packetcapture.cap";
$snaplen = 0;//default packet length
$count = 100;//default number of packets to capture

$fams = array('ip', 'ip6');
$protos = array('icmp', 'icmp6', 'tcp', 'udp', 'arp', 'carp', 'esp');

$input_errors = array();

$interfaces = get_configured_interface_with_descr();
if (isset($config['ipsec']['enable']))
	$interfaces['ipsec'] = "IPsec";
foreach (array('server', 'client') as $mode) {
	if (is_array($config['openvpn']["openvpn-{$mode}"])) {
		foreach ($config['openvpn']["openvpn-{$mode}"] as $id => $setting) {
			if (!isset($setting['disable'])) {
				$interfaces['ovpn' . substr($mode, 0, 1) . $setting['vpnid']] = gettext("OpenVPN") . " ".$mode.": ".htmlspecialchars($setting['description']);
			}
		}
	}
}

if ($_POST) {
	$host = $_POST['host'];
	$selectedif = $_POST['interface'];
	$count = $_POST['count'];
	$snaplen = $_POST['snaplen'];
	$port = $_POST['port'];
	$detail = $_POST['detail'];
	$fam = $_POST['fam'];
	$proto = $_POST['proto'];

	if (!array_key_exists($selectedif, $interfaces)) {
		$input_errors[] = gettext("Invalid interface.");
	}
	if ($fam !== "" && $fam !== "ip" && $fam !== "ip6") {
		$input_errors[] = gettext("Invalid address family.");
	}
	if ($proto !== "" && !in_array($proto, $protos)) {
		$input_errors[] = gettext("Invalid protocol.");
	}
	
	if ($host != "") {
		if (!is_subnet($host) && !is_ipaddr($host)) {
			$input_errors[] = sprintf(gettext("A valid IP address or CIDR block must be specified. [%s]"), $host);
		}
	}
	if ($port != "") {
		if (!is_port($port)) {
			$input_errors[] = gettext("Invalid value specified for port.");
		}
	}
	if ($snaplen == "") {
		$snaplen = 0;
	} else {
		if (!is_numeric($snaplen) || $snaplen < 0) {
			$input_errors[] = gettext("Invalid value specified for packet length.");
		}
	}
	if ($count == "") {
		$count = 0;
	} else {
		if (!is_numeric($count) || $count < 0) {
			$input_errors[] = gettext("Invalid value specified for packet count.");
		}
	}

	if (!count($input_errors)) {
		$do_tcpdump = true;

		conf_mount_rw();

		if ($_POST['promiscuous']) {
			//if promiscuous mode is checked
			$disablepromiscuous = "";
		} else {
			//if promiscuous mode is unchecked
			$disablepromiscuous = "-p";
		}

		if ($_POST['dnsquery']) {
			//if dns lookup is checked
			$disabledns = "";
		} else {
			//if dns lookup is unchecked
			$disabledns = "-n";
		}

		if ($_POST['startbtn'] != "" ) {
			$action = gettext("Start");

			//delete previous packet capture if it exists
			if (file_exists($fp.$fn))
				unlink ($fp.$fn);

		} elseif ($_POST['stopbtn']!= "") {
			$action = gettext("Stop");
			$processes_running = trim(shell_exec("/bin/ps axw -O pid= | /usr/bin/grep tcpdump | /usr/bin/grep {$fn} | /usr/bin/egrep -v '(pflog|grep)'"));

			//explode processes into an array, (delimiter is new line)
			$processes_running_array = explode("\n", $processes_running);

			//kill each of the packetcapture processes
			foreach ($processes_running_array as $process) {
				$process_id_pos = strpos($process, ' ');
				$process_id = substr($process, 0, $process_id_pos);
				exec("kill $process_id");
			}

		} elseif ($_POST['downloadbtn']!= "") {
			//download file
			$fs = filesize($fp.$fn);
			header("Content-Type: application/octet-stream");
			header("Content-Disposition: attachment; filename=$fn");
			header("Content-Length: $fs");
			readfile($fp.$fn);
			exit;
		}
	}
} else {
	$do_tcpdump = false;
}

include("head.inc"); ?>

<body link="#000000" vlink="#0000CC" alink="#0000CC">

<?php
include("fbegin.inc");
?>

<?php if ($input_errors) print_input_errors($input_errors); ?>

<table width="100%" border="0" cellpadding="0" cellspacing="0">
	<tr><td>
	<form action="diag_packet_capture.php" method="post" name="iform" id="iform">
	<table width="100%" border="0" cellpadding="6" cellspacing="0">
		<tr>
			<td colspan="3" valign="top" class="listtopic"><?=gettext("Packet capture");?></td>
		</tr>
		<tr>
			<td width="17%" valign="top" class="vncellreq"><?=gettext("Interface");?></td>
			<td width="32%" class="vtable">
			<select name="interface">
			<?php
			?>
			<?php foreach ($interfaces as $iface => $ifacename): ?>
				<option value="<?=$iface;?>" <?php if ($selectedif == $iface) echo "selected"; ?>>
				<?php echo $ifacename;?>
				</option>
			<?php endforeach; ?>
			</select>
			<br /><?=gettext("Select the interface on which to capture traffic.");?>
			</td>
		</tr>
		<tr>
			<td width="17%" valign="top" class="vncellreq"><?=gettext("Promiscuous");?></td>
			<td width="51%" class="vtable">
			<input name="promiscuous" type="checkbox"<?php if($_POST['promiscuous']) echo " CHECKED"; ?>>
			<br /><?=gettext("If checked, the");?> <a target="_blank" href="http://www.freebsd.org/cgi/man.cgi?query=tcpdump&amp;apropos=0&amp;sektion=0&amp;manpath=FreeBSD+8.3-stable&amp;arch=default&amp;format=html"><?= gettext("packet capture")?></a> <?= gettext("will be performed using promiscuous mode.");?>
			<br /><b><?=gettext("Note");?>: </b><?=gettext("Some network adapters do not support or work well in promiscuous mode.");?>
			</td>
		</tr>
		<tr>
			<td width="17%" valign="top" class="vncellreq"><?=gettext("Address Family");?></td>
			<td colspan="2" width="83%" class="vtable">
			<select name="fam">
				<option value="">Any</option>
				<option value="ip" <?php if ($fam == "ip") echo "selected"; ?>>IPv4 Only</option>
				<option value="ip6" <?php if ($fam == "ip6") echo "selected"; ?>>IPv6 Only</option>
			</select>
			<br /><?=gettext("Select the type of traffic to be captured, either Any, IPv4 only or IPv6 only.");?>
			</td>
		</tr>
		<tr>
			<td width="17%" valign="top" class="vncellreq"><?=gettext("Protocol");?></td>
			<td colspan="2" width="83%" class="vtable">
			<select name="proto">
				<option value="">Any</option>
				<option value="icmp" <?php if ($proto == "icmp") echo "selected"; ?>>ICMP</option>
				<option value="icmp6" <?php if ($proto == "icmp6") echo "selected"; ?>>ICMPv6</option>
				<option value="tcp" <?php if ($proto == "tcp") echo "selected"; ?>>TCP</option>
				<option value="udp" <?php if ($proto == "udp") echo "selected"; ?>>UDP</option>
				<option value="arp" <?php if ($proto == "arp") echo "selected"; ?>>ARP</option>
				<option value="carp" <?php if ($proto == "carp") echo "selected"; ?>>CARP (VRRP)</option>
				<option value="esp" <?php if ($proto == "esp") echo "selected"; ?>>ESP</option>
			</select>
			<br /><?=gettext("Select the protocol to capture, or Any.");?>
			</td>
		</tr>
		<tr>
			<td width="17%" valign="top" class="vncellreq"><?=gettext("Host Address");?></td>
			<td colspan="2" width="83%" class="vtable">
			<input name="host" type="text" class="formfld host" id="host" size="20" value="<?=htmlspecialchars($host);?>">
			<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.");?>
			<br /><?=gettext("This value can be a domain name or IP address, or subnet in CIDR notation.");?>
			<br /><?=gettext("If you leave this field blank, all packets on the specified interface will be captured.");?>
			</td>
		</tr>
		<tr>
			<td width="17%" valign="top" class="vncellreq"><?=gettext("Port");?></td>
			<td colspan="2" width="83%" class="vtable">
			<input name="port" type="text" class="formfld unknown" id="port" size="5" value="<?=$port;?>">
			<br /><?=gettext("The port can be either the source or destination port. The packet capture will look for this port in either field.");?>
			<br /><?=gettext("Leave blank if you do not want to filter by port.");?>
			</td>
		</tr>
		<tr>
			<td width="17%" valign="top" class="vncellreq"><?=gettext("Packet Length");?></td>
			<td colspan="2" width="83%" class="vtable">
			<input name="snaplen" type="text" class="formfld unknown" id="snaplen" size="5" value="<?=$snaplen;?>">
			<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.");?>
			</td>
		</tr>
		<tr>
			<td width="17%" valign="top" class="vncellreq"><?=gettext("Count");?></td>
			<td colspan="2" width="83%" class="vtable">
			<input name="count" type="text" class="formfld unknown" id="count" size="5" value="<?=$count;?>">
			<br /><?=gettext("This is the number of packets the packet capture will grab. Default value is 100.") . "<br />" . gettext("Enter 0 (zero) for no count limit.");?>
			</td>
		</tr>
		<tr>
			<td width="17%" valign="top" class="vncellreq"><?=gettext("Level of Detail");?></td>
			<td colspan="2" width="83%" class="vtable">
			<select name="detail" type="text" class="formselect" id="detail" size="1">
				<option value="normal" <?php if ($detail == "normal") echo "selected"; ?>><?=gettext("Normal");?></option>
				<option value="medium" <?php if ($detail == "medium") echo "selected"; ?>><?=gettext("Medium");?></option>
				<option value="high"   <?php if ($detail == "high")   echo "selected"; ?>><?=gettext("High");?></option>
				<option value="full"   <?php if ($detail == "full")   echo "selected"; ?>><?=gettext("Full");?></option>
			</select>
			<br /><?=gettext("This is the level of detail that will be displayed after hitting 'Stop' when the packets have been captured.") .  "<br /><b>" .
					gettext("Note:") . "</b> " .
					gettext("This option does not affect the level of detail when downloading the packet capture.");?>
			</td>
		</tr>
		<tr>
			<td width="17%" valign="top" class="vncellreq"><?=gettext("Reverse DNS Lookup");?></td>
			<td colspan="2" width="83%" class="vtable">
			<input name="dnsquery" type="checkbox"<?php if($_POST['dnsquery']) echo " CHECKED"; ?>>
			<br /><?=gettext("This check box will cause the packet capture to perform a reverse DNS lookup associated with all IP addresses.");?>
			<br /><b><?=gettext("Note");?>: </b><?=gettext("This option can cause delays for large packet captures.");?>
			</td>
		</tr>
		<tr>
			<td width="17%" valign="top">&nbsp;</td>
			<td colspan="2" width="83%">
<?php

			/* check to see if packet capture tcpdump is already running */
			$processcheck = (trim(shell_exec("/bin/ps axw -O pid= | /usr/bin/grep tcpdump | /usr/bin/grep {$fn} | /usr/bin/egrep -v '(pflog|grep)'")));

			if ($processcheck != "")
				$processisrunning = true;
			else
				$processisrunning = false;

			if (($action == gettext("Stop") or $action == "") and $processisrunning != true)
				echo "<input type=\"submit\" name=\"startbtn\" value=\"" . gettext("Start") . "\">&nbsp;";
			else {
				echo "<input type=\"submit\" name=\"stopbtn\" value=\"" . gettext("Stop") . "\">&nbsp;";
			}
			if (file_exists($fp.$fn) and $processisrunning != true) {
				echo "<input type=\"submit\" name=\"viewbtn\" value=\"" . gettext("View Capture") . "\">&nbsp;";
				echo "<input type=\"submit\" name=\"downloadbtn\" value=\"" . gettext("Download Capture") . "\">";
				echo "<br />" . gettext("The packet capture file was last updated:") . " " . date("F jS, Y g:i:s a.", filemtime($fp.$fn));
			}
?>
			</td>
		</tr>
	</table>
	</form>
	<table width="100%" border="0" cellpadding="6" cellspacing="0">
		<tr>
		<td valign="top" colspan="2">
<?php
		echo "<font face='terminal' size='2'>";
		if ($processisrunning == true)
			echo("<strong>" . gettext("Packet Capture is running.") . "</strong><br />");

		if ($do_tcpdump) {
			$matches = array();

			if (in_array($fam, $fams))
				$matches[] = $fam;

			if (in_array($proto, $protos)) {
				if ($proto == "carp") {
					$matches[] = 'proto 112';
				} else {
					$matches[] = $proto;
				}
			}

			if ($port != "")
				$matches[] = "port ".$port;

			if ($host != "") {
				if (is_ipaddr($host))
					$matches[] = "host " . $host;
				elseif (is_subnet($host))
					$matches[] = "net " . $host;
			}

			if ($count != "0" ) {
				$searchcount = "-c " . $count;
			} else {
				$searchcount = "";
			}

			$selectedif = convert_friendly_interface_to_real_interface_name($selectedif);

			if ($action == gettext("Start")) {
				$matchstr = implode($matches, " and ");
				echo("<strong>" . gettext("Packet Capture is running.") . "</strong><br />");
				mwexec_bg ("/usr/sbin/tcpdump -i $selectedif $disablepromiscuous $searchcount -s $snaplen -w $fp$fn $matchstr");
			} else {
				//action = stop
				echo("<strong>" . gettext("Packet Capture stopped.") . "<br /><br />" . gettext("Packets Captured:") . "</strong><br />");
?>
				<textarea style="width:98%" name="code" rows="15" cols="66" wrap="off" readonly="readonly">
<?php
				$detail_args = "";
				switch ($detail) {
				case "full":
					$detail_args = "-vv -e";
					break;
				case "high":
					$detail_args = "-vv";
					break;
				case "medium":
					$detail_args = "-v";
					break;
				case "normal":
				default:
					$detail_args = "-q";
					break;
				}
				system("/usr/sbin/tcpdump $disabledns $detail_args -r $fp$fn");

				conf_mount_ro();
?>
				</textarea>
<?php
			}
		}
?>
		</td>
		</tr>
	</table>
	</td></tr>
</table>

<?php
include("fend.inc");
?>
OpenPOWER on IntegriCloud