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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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global $buffer_rules_rdr, $buffer_rules_normal;
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$buffer_rules_rdr = array();
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$buffer_rules_normal = array();
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/* format filter logs */
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function conv_log_filter($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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/* 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($logfile) . " | /usr/bin/grep 'filterlog:' | /usr/bin/tail -r -n {$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/grep 'filterlog:' | /usr/bin/tail -r -n {$tail}", $logarr);
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$filterlog = array();
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$counter = 0;
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$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 escape_filter_regex($filtertext) {
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/* If the caller (user) has not already put a backslash before a slash, to escape it in the regex, */
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/* then this will do it. Take out any "\/" already there, then turn all ordinary "/" into "\/". */
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return str_replace('/', '\/', str_replace('\/', '/', $filtertext));
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}
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function match_filter_line($flent, $filtertext = "") {
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if (!$filtertext)
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return true;
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$filtertext = escape_filter_regex(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 $field) {
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if ($fields[$field] == "All") continue;
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if ((strpos($fields[$field], '!') === 0)) {
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$fields[$field] = substr($fields[$field], 1);
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if (preg_match("/act/i", $field)) {
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if ( (in_arrayi($flent[$field], explode(",", str_replace(" ", ",", $fields[$field]))) ) ) return false;
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} else {
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$field_regex = escape_filter_regex($fields[$field]);
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if ( (@preg_match("/{$field_regex}/i", $flent[$field])) )
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return false;
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}
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}
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else {
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if (preg_match("/act/i", $field)) {
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if ( !(in_arrayi($flent[$field], explode(",", str_replace(" ", ",", $fields[$field]))) ) ) return false;
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} else {
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$field_regex = escape_filter_regex($fields[$field]);
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if ( !(@preg_match("/{$field_regex}/i", $flent[$field])) )
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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', $haystack));
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}
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function parse_filter_line($line) {
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global $config, $g;
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$flent = array();
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$log_split = "";
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if (!preg_match("/(.*)\s(.*)\sfilterlog:\s(.*)$/", $line, $log_split))
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return "";
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list($all, $flent['time'], $host, $rule) = $log_split;
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$rule_data = explode(",", $rule);
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$field = 0;
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$flent['rulenum'] = $rule_data[$field++];
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$flent['subrulenum'] = $rule_data[$field++];
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$flent['anchor'] = $rule_data[$field++];
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$flent['tracker'] = $rule_data[$field++];
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$flent['realint'] = $rule_data[$field++];
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$flent['interface'] = convert_real_interface_to_friendly_descr($flent['realint']);
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$flent['reason'] = $rule_data[$field++];
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$flent['act'] = $rule_data[$field++];
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$flent['direction'] = $rule_data[$field++];
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$flent['version'] = $rule_data[$field++];
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if ($flent['version'] == '4' || $flent['version'] == '6') {
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if ($flent['version'] == '4') {
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$flent['tos'] = $rule_data[$field++];
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$flent['ecn'] = $rule_data[$field++];
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$flent['ttl'] = $rule_data[$field++];
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$flent['id'] = $rule_data[$field++];
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$flent['offset'] = $rule_data[$field++];
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$flent['flags'] = $rule_data[$field++];
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$flent['protoid'] = $rule_data[$field++];
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$flent['proto'] = strtoupper($rule_data[$field++]);
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} else {
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$flent['class'] = $rule_data[$field++];
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$flent['flowlabel'] = $rule_data[$field++];
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$flent['hlim'] = $rule_data[$field++];
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$flent['proto'] = $rule_data[$field++];
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$flent['protoid'] = $rule_data[$field++];
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}
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$flent['length'] = $rule_data[$field++];
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$flent['srcip'] = $rule_data[$field++];
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$flent['dstip'] = $rule_data[$field++];
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if ($flent['protoid'] == '6' || $flent['protoid'] == '17') { // TCP or UDP
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$flent['srcport'] = $rule_data[$field++];
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$flent['dstport'] = $rule_data[$field++];
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$flent['src'] = $flent['srcip'] . ':' . $flent['srcport'];
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$flent['dst'] = $flent['dstip'] . ':' . $flent['dstport'];
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$flent['datalen'] = $rule_data[$field++];
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if ($flent['protoid'] == '6') { // TCP
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$flent['tcpflags'] = $rule_data[$field++];
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$flent['seq'] = $rule_data[$field++];
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$flent['ack'] = $rule_data[$field++];
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$flent['window'] = $rule_data[$field++];
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$flent['urg'] = $rule_data[$field++];
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$flent['options'] = explode(";",$rule_data[$field++]);
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}
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} else if ($flent['protoid'] == '1') { // ICMP
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$flent['src'] = $flent['srcip'];
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$flent['dst'] = $flent['dstip'];
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$flent['icmp_type'] = $rule_data[$field++];
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switch ($flent['icmp_type']) {
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case "request":
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case "reply":
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$flent['icmp_id'] = $rule_data[$field++];
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$flent['icmp_seq'] = $rule_data[$field++];
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break;
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case "unreachproto":
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$flent['icmp_dstip'] = $rule_data[$field++];
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$flent['icmp_protoid'] = $rule_data[$field++];
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break;
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case "unreachport":
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$flent['icmp_dstip'] = $rule_data[$field++];
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$flent['icmp_protoid'] = $rule_data[$field++];
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$flent['icmp_port'] = $rule_data[$field++];
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break;
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case "unreach":
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case "timexceed":
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case "paramprob":
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case "redirect":
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case "maskreply":
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$flent['icmp_descr'] = $rule_data[$field++];
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break;
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case "needfrag":
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$flent['icmp_dstip'] = $rule_data[$field++];
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$flent['icmp_mtu'] = $rule_data[$field++];
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break;
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case "tstamp":
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$flent['icmp_id'] = $rule_data[$field++];
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$flent['icmp_seq'] = $rule_data[$field++];
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break;
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case "tstampreply":
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$flent['icmp_id'] = $rule_data[$field++];
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$flent['icmp_seq'] = $rule_data[$field++];
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$flent['icmp_otime'] = $rule_data[$field++];
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$flent['icmp_rtime'] = $rule_data[$field++];
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$flent['icmp_ttime'] = $rule_data[$field++];
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break;
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default :
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$flent['icmp_descr'] = $rule_data[$field++];
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break;
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}
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} else if ($flent['protoid'] == '112') { // CARP
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$flent['type'] = $rule_data[$field++];
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$flent['ttl'] = $rule_data[$field++];
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$flent['vhid'] = $rule_data[$field++];
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$flent['version'] = $rule_data[$field++];
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$flent['advskew'] = $rule_data[$field++];
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$flent['advbase'] = $rule_data[$field++];
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}
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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 number: %s. Please report to mailing list or forum."), $flent['rulenum']));
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return "";
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}
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/* If there is a src, a dst, and a time, then the line should be usable/good */
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if (!((trim($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."), $errline));
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}
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return "";
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}
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}
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264
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function get_port_with_service($port, $proto) {
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265
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if (!$port)
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return '';
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267
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268
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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 ':' . $portstr;
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}
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277
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278
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function find_rule_by_number($rulenum, $trackernum, $type="block") {
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279
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global $g;
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280
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281
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/* Passing arbitrary input to grep could be a Very Bad Thing(tm) */
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282
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if (!is_numeric($rulenum) || !is_numeric($trackernum) || !in_array($type, array('pass', 'block', 'match', 'rdr')))
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283
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return;
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284
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285
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if ($trackernum == "0")
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286
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$lookup_pattern = "^@{$rulenum}\([0-9]+\)[[:space:]]{$type}[[:space:]].*[[:space:]]log[[:space:]]";
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else
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$lookup_pattern = "^@[0-9]+\({$trackernum}\)[[:space:]]{$type}[[:space:]].*[[:space:]]log[[:space:]]";
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289
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290
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/* At the moment, miniupnpd is the only thing I know of that
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291
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generates logging rdr rules */
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292
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unset($buffer);
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293
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if ($type == "rdr")
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294
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$_gb = exec("/sbin/pfctl -vvPsn -a \"miniupnpd\" | /usr/bin/egrep " . escapeshellarg("^@{$rulenum}"), $buffer);
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else {
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296
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if (file_exists("{$g['tmp_path']}/rules.debug"))
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$_gb = exec("/sbin/pfctl -vvPnf {$g['tmp_path']}/rules.debug 2>/dev/null | /usr/bin/egrep " . escapeshellarg($lookup_pattern), $buffer);
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298
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else
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$_gb = exec("/sbin/pfctl -vvPsr | /usr/bin/egrep " . escapeshellarg($lookup_pattern), $buffer);
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300
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}
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301
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if (is_array($buffer))
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302
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return $buffer[0];
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303
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304
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return "";
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305
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}
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306
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307
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function buffer_rules_load() {
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global $g, $buffer_rules_rdr, $buffer_rules_normal;
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309
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unset($buffer, $buffer_rules_rdr, $buffer_rules_normal);
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310
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/* Redeclare globals after unset to work around PHP */
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311
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global $buffer_rules_rdr, $buffer_rules_normal;
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312
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$buffer_rules_rdr = array();
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313
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$buffer_rules_normal = array();
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314
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315
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$_gb = exec("/sbin/pfctl -vvPsn -a \"miniupnpd\" | grep '^@'", $buffer);
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316
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if (is_array($buffer)) {
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317
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foreach ($buffer as $line) {
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318
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list($key, $value) = explode (" ", $line, 2);
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319
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$buffer_rules_rdr[$key] = $value;
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320
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}
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321
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}
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322
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unset($buffer, $_gb);
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323
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if (file_exists("{$g['tmp_path']}/rules.debug"))
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$_gb = exec("/sbin/pfctl -vvPnf {$g['tmp_path']}/rules.debug 2>/dev/null | /usr/bin/egrep '^@[0-9]+\([0-9]+\)[[:space:]].*[[:space:]]log[[:space:]]' | /usr/bin/egrep -v '^@[0-9]+\([0-9]+\)[[:space:]](nat|rdr|binat|no|scrub)'", $buffer);
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325
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else
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326
|
$_gb = exec("/sbin/pfctl -vvPsr | /usr/bin/egrep '^@[0-9]+\([0-9]+\)[[:space:]].*[[:space:]]log[[:space:]]'", $buffer);
|
|
327
|
|
|
328
|
if (is_array($buffer)) {
|
|
329
|
foreach ($buffer as $line) {
|
|
330
|
list($key, $value) = explode (" ", $line, 2);
|
|
331
|
# pfctl rule number output with tracker number: @dd(dddddddddd)
|
|
332
|
$matches = array();
|
|
333
|
if (preg_match('/\@(?P<rulenum>\d+)\((?<trackernum>\d+)\)/', $key, $matches) == 1) {
|
|
334
|
if ($matches['trackernum'] > 0)
|
|
335
|
$key = $matches['trackernum'];
|
|
336
|
else
|
|
337
|
$key = "@{$matches['rulenum']}";
|
|
338
|
}
|
|
339
|
$buffer_rules_normal[$key] = $value;
|
|
340
|
}
|
|
341
|
}
|
|
342
|
unset($_gb, $buffer);
|
|
343
|
}
|
|
344
|
|
|
345
|
function buffer_rules_clear() {
|
|
346
|
unset($GLOBALS['buffer_rules_normal']);
|
|
347
|
unset($GLOBALS['buffer_rules_rdr']);
|
|
348
|
}
|
|
349
|
|
|
350
|
function find_rule_by_number_buffer($rulenum, $trackernum, $type){
|
|
351
|
global $g, $buffer_rules_rdr, $buffer_rules_normal;
|
|
352
|
|
|
353
|
if ($trackernum == "0")
|
|
354
|
$lookup_key = "@{$rulenum}";
|
|
355
|
else
|
|
356
|
$lookup_key = $trackernum;
|
|
357
|
|
|
358
|
if ($type == "rdr") {
|
|
359
|
$ruleString = $buffer_rules_rdr[$lookup_key];
|
|
360
|
//TODO: get the correct 'description' part of a RDR log line. currently just first 30 characters..
|
|
361
|
$rulename = substr($ruleString,0,30);
|
|
362
|
} else {
|
|
363
|
$ruleString = $buffer_rules_normal[$lookup_key];
|
|
364
|
list(,$rulename,) = explode("\"",$ruleString);
|
|
365
|
$rulename = str_replace("USER_RULE: ",'<img src="/themes/'.$g['theme'].'/images/icons/icon_frmfld_user.png" width="11" height="12" title="USER_RULE" alt="USER_RULE"/> ',$rulename);
|
|
366
|
}
|
|
367
|
return "{$rulename} ({$lookup_key})";
|
|
368
|
}
|
|
369
|
|
|
370
|
function find_action_image($action) {
|
|
371
|
global $g;
|
|
372
|
if ((strstr(strtolower($action), "p")) || (strtolower($action) == "rdr"))
|
|
373
|
return "/themes/{$g['theme']}/images/icons/icon_pass.gif";
|
|
374
|
else if(strstr(strtolower($action), "r"))
|
|
375
|
return "/themes/{$g['theme']}/images/icons/icon_reject.gif";
|
|
376
|
else
|
|
377
|
return "/themes/{$g['theme']}/images/icons/icon_block.gif";
|
|
378
|
}
|
|
379
|
|
|
380
|
/* AJAX specific handlers */
|
|
381
|
function handle_ajax($nentries, $tail = 50) {
|
|
382
|
global $config;
|
|
383
|
if($_GET['lastsawtime'] or $_POST['lastsawtime']) {
|
|
384
|
global $filter_logfile,$filterent;
|
|
385
|
if($_GET['lastsawtime'])
|
|
386
|
$lastsawtime = $_GET['lastsawtime'];
|
|
387
|
if($_POST['lastsawtime'])
|
|
388
|
$lastsawtime = $_POST['lastsawtime'];
|
|
389
|
/* compare lastsawrule's time stamp to filter logs.
|
|
390
|
* afterwards return the newer records so that client
|
|
391
|
* can update AJAX interface screen.
|
|
392
|
*/
|
|
393
|
$new_rules = "";
|
|
394
|
$filterlog = conv_log_filter($filter_logfile, $nentries, $tail);
|
|
395
|
/* We need this to always be in forward order for the AJAX update to work properly */
|
|
396
|
$filterlog = isset($config['syslog']['reverse']) ? array_reverse($filterlog) : $filterlog;
|
|
397
|
foreach($filterlog as $log_row) {
|
|
398
|
$row_time = strtotime($log_row['time']);
|
|
399
|
$img = "<img border='0' src='" . find_action_image($log_row['act']) . "' alt={$log_row['act']} title={$log_row['act']} />";
|
|
400
|
if($row_time > $lastsawtime) {
|
|
401
|
if ($log_row['proto'] == "TCP")
|
|
402
|
$log_row['proto'] .= ":{$log_row['tcpflags']}";
|
|
403
|
|
|
404
|
$img = "<a href=\"#\" onClick=\"javascript:getURL('diag_logs_filter.php?getrulenum={$log_row['rulenum']},{$log_row['rulenum']}', outputrule);\">{$img}</a>";
|
|
405
|
$new_rules .= "{$img}||{$log_row['time']}||{$log_row['interface']}||{$log_row['srcip']}||{$log_row['dst']}||{$log_row['proto']}||" . time() . "||\n";
|
|
406
|
}
|
|
407
|
}
|
|
408
|
echo $new_rules;
|
|
409
|
exit;
|
|
410
|
}
|
|
411
|
}
|
|
412
|
|
|
413
|
?>
|