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<?php
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/* $Id$ */
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/*
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filter_log.inc
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part of pfSesne by Scott Ullrich
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originally based on m0n0wall (http://m0n0.ch/wall)
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Copyright (C) 2009 Jim Pingle <myfirstname>@<mylastname>.org
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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/sbin/fifolog_reader /usr/bin/tail /usr/local/sbin/clog
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pfSense_MODULE: filter
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*/
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require 'config.inc';
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/* format filter logs */
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function conv_log_filter($logfile, $nentries, $tail = 50, $filtertext = "", $filterinterface = null) {
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global $config, $g;
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/* Make sure this is a number before using it in a system call */
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if (!(is_numeric($tail)))
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return;
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if ($filtertext)
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$tail = 5000;
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/* FreeBSD 8 splits pf log lines into two lines, so we need to at least
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* tail twice as many, plus some extra to account for unparseable lines */
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$tail = $tail * 2 + 50;
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/* Always do a reverse tail, to be sure we're grabbing the 'end' of the log. */
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$logarr = "";
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if(isset($config['system']['usefifolog']))
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exec("/usr/sbin/fifolog_reader " . escapeshellarg($logfile) . " | /usr/bin/tail -r -n {$tail}", $logarr);
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else
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exec("/usr/local/sbin/clog " . escapeshellarg($logfile) . " | grep -v \"CLOG\" | grep -v \"\033\" | /usr/bin/tail -r -n {$tail}", $logarr);
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$filterlog = array();
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$counter = 0;
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$logarr = array_reverse(collapse_filter_lines(array_reverse($logarr)));
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$filterinterface = strtoupper($filterinterface);
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foreach ($logarr as $logent) {
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if($counter >= $nentries)
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break;
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$flent = parse_filter_line($logent);
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if (!$filterinterface || ($filterinterface == $flent['interface']))
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{
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if ( ( ($flent != "") && (!is_array($filtertext)) && (match_filter_line ($flent, $filtertext))) ||
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( ($flent != "") && ( is_array($filtertext)) && (match_filter_field($flent, $filtertext)) ) ) {
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$counter++;
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$filterlog[] = $flent;
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}
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}
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}
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/* Since the lines are in reverse order, flip them around if needed based on the user's preference */
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return isset($config['syslog']['reverse']) ? $filterlog : array_reverse($filterlog);
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}
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function match_filter_line($flent, $filtertext = "") {
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if (!$filtertext)
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return true;
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$filtertext = str_replace(' ', '\s+', $filtertext);
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return preg_match("/{$filtertext}/i", implode(" ", array_values($flent)));
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}
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function match_filter_field($flent, $fields) {
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foreach ($fields as $key => $field) {
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if ($field == "All")
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continue;
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if ((strpos($field, '!') === 0)) {
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$field = substr($field, 1);
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if (strtolower($key) == 'act') {
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if (in_arrayi($flent[$key], explode(" ", $field)))
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return false;
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} else {
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if (@preg_match("/{$field}/i", $flent[$key]))
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return false;
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}
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} else {
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if (strtolower($key) == 'act') {
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if (!in_arrayi($flent[$key], explode(" ", $field)))
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return false;
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} else {
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if (!@preg_match("/{$field}/i", $flent[$key]))
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return false;
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}
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}
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}
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return true;
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}
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// Case Insensitive in_array function
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function in_arrayi($needle, $haystack) {
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return in_array(strtolower($needle), array_map('strtolower', $haystack));
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}
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function collapse_filter_lines($logarr) {
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$lastline = "";
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$collapsed = array();
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/* Stick a blank entry at the end to be sure we always fully parse the last entry */
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$logarr[] = "";
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foreach ($logarr as $logent) {
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$line_split = "";
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preg_match("/.*\spf:\s(.*)/", $logent, $line_split);
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if (substr($line_split[1], 0, 4) != " ") {
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if (($lastline != "") && (substr($lastline, 0, 1) != " ")) {
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$collapsed[] = $lastline;
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}
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$lastline = $logent;
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} else {
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$lastline .= substr($line_split[1], 3);
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}
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}
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//print_r($collapsed);
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return $collapsed;
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}
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function parse_filter_line($line) {
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global $config, $g;
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$log_split = "";
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preg_match("/(.*)\s(.*)\spf:\s.*\srule\s(.*)\(match\)\:\s(.*)\s(\w+)\son\s(\w+)\:\s\((.*)\)\s(.*)\s>\s(.*)\:\s(.*)/", $line, $log_split);
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list($all, $flent['time'], $host, $rule, $flent['act'], $flent['direction'], $flent['realint'], $details, $src, $dst, $leftovers) = $log_split;
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list($flent['srcip'], $flent['srcport']) = parse_ipport($src);
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list($flent['dstip'], $flent['dstport']) = parse_ipport($dst);
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$flent['src'] = $flent['srcip'];
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$flent['dst'] = $flent['dstip'];
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if ($flent['srcport'])
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$flent['src'] .= ':' . $flent['srcport'];
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if ($flent['dstport'])
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$flent['dst'] .= ':' . $flent['dstport'];
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$flent['interface'] = convert_real_interface_to_friendly_descr($flent['realint']);
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$tmp = explode("/", $rule);
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$flent['rulenum'] = $tmp[0];
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$proto = array(" ", "(?)");
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/* Attempt to determine the protocol, based on several possible patterns.
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* The value returned by strpos() must be strictly checkeded against the
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* boolean FALSE because it could return a valid answer of 0 upon success. */
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if (!(strpos($details, 'proto ') === FALSE)) {
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preg_match("/.*\sproto\s(.*)\s\(/", $details, $proto);
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} elseif (!(strpos($details, 'next-header ') === FALSE)) {
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preg_match("/.*\snext-header\s(.*)\s\(/", $details, $proto);
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} elseif (!(strpos($details, 'proto: ') === FALSE)) {
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preg_match("/.*\sproto\:(.*)\s\(/", $details, $proto);
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} elseif (!(strpos($leftovers, 'sum ok] ') === FALSE)) {
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preg_match("/.*\ssum ok]\s(.*)\,\s.*/", $leftovers, $proto);
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} elseif (!(strpos($line, 'sum ok] ') === FALSE)) {
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preg_match("/.*\ssum ok]\s(.*)\,\s.*/", $line, $proto);
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}
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$proto = explode(" ", trim($proto[1]));
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$flent['proto'] = rtrim($proto[0], ",");
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/* If we're dealing with TCP, try to determine the flags/control bits */
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$flent['tcpflags'] = "";
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if ($flent['proto'] == "TCP") {
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$flags = preg_split('/[, ]/', $leftovers);
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$flent['tcpflags'] = str_replace(".", "A", substr($flags[1], 1, -1));
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} elseif ($flent['proto'] == "Options") {
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/* Then there must be some info we missed */
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if (!(strpos($leftovers, 'sum ok] ') === FALSE)) {
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preg_match("/.*\ssum ok]\s(.*)\,\s.*/", $leftovers, $proto);
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} elseif (!(strpos($line, 'sum ok] ') === FALSE)) {
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preg_match("/.*\ssum ok]\s(.*)\,\s.*/", $line, $proto);
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}
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$proto = explode(" ", trim($proto[1]));
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$flent['proto'] = rtrim($proto[0], ",");
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/* If it's still 'Options', then just ignore it. */
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if ($flent['proto'] == "Options")
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$flent['proto'] = "none";
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} elseif (($flent['proto'] == "unknown") && (!(strpos($line, ': pfsync') === FALSE))) {
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$flent['proto'] = "PFSYNC";
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}
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/* If there is a src, a dst, and a time, then the line should be usable/good */
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if (!((trim($flent['src']) == "") || (trim($flent['dst']) == "") || (trim($flent['time']) == ""))) {
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return $flent;
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} else {
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if($g['debug']) {
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log_error(sprintf(gettext("There was a error parsing rule: %s. Please report to mailing list or forum."), $errline));
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}
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return "";
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}
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}
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function parse_ipport($addr) {
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$addr = trim(rtrim($addr, ":"));
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if (substr($addr, 0, 4) == "kip ")
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$addr = substr($addr, 4);
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$port = '';
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if (substr_count($addr, '.') > 1) {
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/* IPv4 */
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$addr_split = explode(".", $addr);
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$ip = "{$addr_split[0]}.{$addr_split[1]}.{$addr_split[2]}.{$addr_split[3]}";
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if ($ip == "...")
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return array($addr, '');
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if($addr_split[4] != "") {
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$port_split = explode(":", $addr_split[4]);
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$port = $port_split[0];
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}
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} else {
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/* IPv6 */
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$addr = explode(" ", $addr);
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$addr = rtrim($addr[0], ":");
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$addr_split = explode(".", $addr);
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if (count($addr_split) > 1) {
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$ip = $addr_split[0];
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$port = $addr_split[1];
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} else {
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$ip = $addr;
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}
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}
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return array($ip, $port);
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}
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function get_port_with_service($port, $proto) {
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if (!$port)
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return '';
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$service = getservbyport($port, $proto);
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$portstr = "";
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if ($service) {
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$portstr = sprintf('<span title="' . gettext('Service %1$s/%2$s: %3$s') . '">' . htmlspecialchars($port) . '</span>', $port, $proto, $service);
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} else {
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$portstr = htmlspecialchars($port);
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}
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return ':' . $portstr;
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}
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function find_rule_by_number($rulenum, $type="rules") {
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/* Passing arbitrary input to grep could be a Very Bad Thing(tm) */
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if (!(is_numeric($rulenum)))
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return;
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/* At the moment, miniupnpd is the only thing I know of that
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generates logging rdr rules */
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if ($type == "rdr")
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return `pfctl -vvsn -a "miniupnpd" | grep '^@{$rulenum} '`;
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else
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return `pfctl -vvsr | grep '^@{$rulenum} '`;
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}
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function buffer_rules_load() {
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global $buffer_rules_rdr, $buffer_rules_normal;
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$buffer = explode("\n",`pfctl -vvsn -a "miniupnpd" | grep '^@'`);
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foreach ($buffer as $line) {
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list($key, $value) = explode (" ", $line, 2);
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$buffer_rules_rdr[$key] = $value;
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}
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$buffer = explode("\n",`pfctl -vvsr | grep '^@'`);
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foreach ($buffer as $line) {
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list($key, $value) = explode (" ", $line, 2);
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$buffer_rules_normal[$key] = $value;
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}
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}
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function buffer_rules_clear() {
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unset($GLOBALS['buffer_rules_normal']);
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unset($GLOBALS['buffer_rules_rdr']);
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}
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function find_rule_by_number_buffer($rulenum, $type){
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global $g, $buffer_rules_rdr, $buffer_rules_normal;
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if ($type == "rdr") {
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$ruleString = $buffer_rules_rdr["@".$rulenum];
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//TODO: get the correct 'description' part of a RDR log line. currently just first 30 characters..
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$rulename = substr($ruleString,0,30);
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} else {
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$ruleString = $buffer_rules_normal["@".$rulenum];
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list(,$rulename,) = explode("\"",$ruleString);
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$rulename = str_replace("USER_RULE: ",'<img src="/themes/'.$g['theme'].'/images/icons/icon_frmfld_user.png" width="11" height="12" title="USER_RULE" alt="USER_RULE"/> ',htmlspecialchars($rulename));
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}
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return $rulename." (@".$rulenum.")";
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}
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function find_action_image($action) {
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global $g;
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if ((strstr(strtolower($action), "p")) || (strtolower($action) == "rdr"))
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return "/themes/{$g['theme']}/images/icons/icon_pass.gif";
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else if(strstr(strtolower($action), "r"))
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return "/themes/{$g['theme']}/images/icons/icon_reject.gif";
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else
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return "/themes/{$g['theme']}/images/icons/icon_block.gif";
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}
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function is_first_row($rownum, $totalrows) {
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global $config;
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if(isset($config['syslog']['reverse'])) {
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/* Honor reverse logging setting */
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if($rownum == 0)
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return " id=\"firstrow\"";
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} else {
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/* non-reverse logging */
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if($rownum == $totalrows - 1)
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return " id=\"firstrow\"";
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}
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return "";
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}
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/* AJAX specific handlers */
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function handle_ajax($nentries, $tail = 50) {
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global $config;
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337
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if($_GET['lastsawtime'] or $_POST['lastsawtime']) {
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global $filter_logfile,$filterent;
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339
|
if($_GET['lastsawtime'])
|
|
340
|
$lastsawtime = $_GET['lastsawtime'];
|
|
341
|
if($_POST['lastsawtime'])
|
|
342
|
$lastsawtime = $_POST['lastsawtime'];
|
|
343
|
/* compare lastsawrule's time stamp to filter logs.
|
|
344
|
* afterwards return the newer records so that client
|
|
345
|
* can update AJAX interface screen.
|
|
346
|
*/
|
|
347
|
$new_rules = "";
|
|
348
|
$filterlog = conv_log_filter($filter_logfile, $nentries, $tail);
|
|
349
|
/* We need this to always be in forward order for the AJAX update to work properly */
|
|
350
|
$filterlog = isset($config['syslog']['reverse']) ? array_reverse($filterlog) : $filterlog;
|
|
351
|
foreach($filterlog as $log_row) {
|
|
352
|
$row_time = strtotime($log_row['time']);
|
|
353
|
$img = "<img border='0' src='" . find_action_image($log_row['act']) . "' alt={$log_row['act']} title={$log_row['act']} />";
|
|
354
|
if($row_time > $lastsawtime) {
|
|
355
|
if ($log_row['proto'] == "TCP")
|
|
356
|
$log_row['proto'] .= ":{$log_row['tcpflags']}";
|
|
357
|
|
|
358
|
$img = "<a href=\"#\" onClick=\"javascript:getURL('diag_logs_filter.php?getrulenum={$log_row['rulenum']},{$log_row['rulenum']}', outputrule);\">{$img}</a>";
|
|
359
|
$new_rules .= "{$img}||{$log_row['time']}||{$log_row['interface']}||{$log_row['srcip']}||{$log_row['dst']}||{$log_row['proto']}||" . time() . "||\n";
|
|
360
|
}
|
|
361
|
}
|
|
362
|
echo $new_rules;
|
|
363
|
exit;
|
|
364
|
}
|
|
365
|
}
|
|
366
|
|
|
367
|
?>
|