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<?php
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/* $Id$ */
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/*
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Copyright (C) 2008 Bill Marquette, Seth Mos
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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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/* add static routes for monitor IP addresse
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* creates monitoring configuration file
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*/
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function setup_gateways_monitor() {
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global $config;
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global $g;
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$gateways_arr = return_gateways_array();
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if (is_array($config['gateways']['settings'])) {
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$a_settings = &$config['gateways']['settings'];
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} else {
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$a_settings['latencylow'] = "200";
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$a_settings['latencyhigh'] = "500";
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$a_settings['losslow'] = "10";
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$a_settings['losshigh'] = "20";
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}
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/* kill apinger process */
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if(is_process_running("apinger"))
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mwexec("/usr/bin/killall apinger", true);
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$fd = fopen("{$g['varetc_path']}/apinger.conf", "w");
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$apingerconfig = <<<EOD
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# pfSense apinger configuration file. Automatically Generated!
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## User and group the pinger should run as
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user "nobody"
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group "nobody"
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## Mailer to use (default: "/usr/lib/sendmail -t")
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#mailer "/var/qmail/bin/qmail-inject"
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## Location of the pid-file (default: "/var/run/apinger.pid")
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pid_file "{$g['varrun_path']}/apinger.pid"
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## Format of timestamp (%s macro) (default: "%b %d %H:%M:%S")
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#timestamp_format "%Y%m%d%H%M%S"
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status {
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## File where the status information whould be written to
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file "/tmp/apinger.status"
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## Interval between file updates
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## when 0 or not set, file is written only when SIGUSR1 is received
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interval 10s
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}
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########################################
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# RRDTool status gathering configuration
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# Interval between RRD updates
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rrd interval 60s;
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## These parameters can be overriden in a specific alarm configuration
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alarm default {
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command on "/usr/bin/touch /tmp/filter_dirty"
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command off "/usr/bin/touch /tmp/filter_dirty"
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combine 10s
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}
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## "Down" alarm definition.
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## This alarm will be fired when target doesn't respond for 30 seconds.
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alarm down "down" {
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time 10s
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}
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## "Delay" alarm definition.
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## This alarm will be fired when responses are delayed more than 200ms
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## it will be canceled, when the delay drops below 100ms
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alarm delay "delay" {
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delay_low {$a_settings['latencylow']}ms
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delay_high {$a_settings['latencyhigh']}ms
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}
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## "Loss" alarm definition.
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## This alarm will be fired when packet loss goes over 20%
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## it will be canceled, when the loss drops below 10%
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alarm loss "loss" {
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percent_low {$a_settings['losslow']}
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percent_high {$a_settings['losshigh']}
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}
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target default {
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## How often the probe should be sent
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interval 1s
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## How many replies should be used to compute average delay
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## for controlling "delay" alarms
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avg_delay_samples 10
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## How many probes should be used to compute average loss
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avg_loss_samples 50
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## The delay (in samples) after which loss is computed
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## without this delays larger than interval would be treated as loss
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avg_loss_delay_samples 20
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## Names of the alarms that may be generated for the target
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alarms "down","delay","loss"
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## Location of the RRD
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#rrd file "{$g['vardb_path']}/rrd/apinger-%t.rrd"
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}
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## Targets to probe
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## Each one defined with:
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## target <address> { <parameter>... }
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## The parameters are those described above in the "target default" section
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## plus the "description" parameter.
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## the <address> should be IPv4 or IPv6 address (not hostname!)
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EOD;
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/* add static routes for each gateway with their monitor IP */
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if(is_array($gateways_arr)) {
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foreach($gateways_arr as $name => $gateway) {
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if($gateway['monitor'] == "") {
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$gateway['monitor'] = $gateway['gateway'];
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}
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$apingerconfig .= "target \"{$gateway['monitor']}\" {\n";
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$apingerconfig .= " description \"{$gateway['name']}\"\n";
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$apingerconfig .= " rrd file \"{$g['vardb_path']}/rrd/{$gateway['name']}-quality.rrd\"\n";
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$apingerconfig .= "}\n";
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$apingerconfig .= "\n";
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if($gateway['monitor'] == $gateway['gateway']) {
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/* if the gateway is the same as the monitor we do not add a
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* route as this will break the routing table */
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continue;
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} else {
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mwexec("/sbin/route delete -host " . escapeshellarg($gateway['monitor']));
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if(! stristr("127.0.0", $gateway['gateway'])) {
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mwexec("/sbin/route add -host " . escapeshellarg($gateway['monitor']) .
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" " . escapeshellarg($gateway['gateway']));
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log_error("Removing static route for monitor {$gateway['monitor']} and adding a new route through {$gateway['gateway']}");
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}
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}
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}
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}
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fwrite($fd, $apingerconfig);
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fclose($fd);
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if(!is_process_running("apinger")) {
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if (is_dir("{$g['tmp_path']}"))
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chmod("{$g['tmp_path']}", 01777);
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if (is_dir("{$g['vardb_path']}/rrd"))
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chown("{$g['vardb_path']}/rrd", "nobody");
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/* start a new apinger process */
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mwexec_bg("/usr/local/sbin/apinger -c {$g['varetc_path']}/apinger.conf");
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}
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return 0;
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}
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/* return the status of the apinger targets as a array */
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function return_gateways_status() {
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global $config;
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global $g;
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$gateways_arr = return_gateways_array();
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$apingerstatus = array();
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if(is_readable("{$g['tmp_path']}/apinger.status"))
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$apingerstatus = file("{$g['tmp_path']}/apinger.status");
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$status = array();
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foreach($apingerstatus as $line) {
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$fields = explode(":", $line);
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switch($fields[0]) {
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case "Target":
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$target = trim($fields[1]);
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$status[$target] = array();
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$status[$target]['monitor'] = $target;
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foreach($gateways_arr as $name => $gateway) {
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if($gateway['monitor'] == "$target") {
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$status[$target]['gateway'] = $gateway['gateway'];
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$status[$target]['interface'] = $gateway['interface'];
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}
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}
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break;
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case "Description":
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$status[$target]['name'] = trim($fields[1]);
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break;
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case "Last reply received":
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$status[$target]['lastcheck'] = trim($fields[1]) .":". trim($fields[2]) .":". trim($fields[3]);
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break;
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case "Average delay":
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$status[$target]['delay'] = trim($fields[1]);
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break;
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case "Average packet loss":
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$status[$target]['loss'] = trim($fields[1]);
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break;
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case "Active alarms":
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$status[$target]['status'] = trim($fields[1]);
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break;
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}
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}
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return($status);
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}
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function return_gateways_array() {
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global $config;
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$gateways_arr = array();
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/* Loop through all interfaces with a gateway and add it to a array */
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$iflist = get_configured_interface_with_descr();
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foreach($iflist as $ifname => $friendly ) {
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if(interface_has_gateway($ifname)) {
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$gateway = array();
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$gateway['gateway'] = get_interface_gateway($ifname);
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/* Loopback dummy for dynamic interfaces without a IP */
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if(!is_ipaddr(trim($gateway['gateway']))) {
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$gateway['gateway'] = "127.0.0.2";
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}
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/*
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* do not add dynamic gateways if it is also found
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* in the gateways array.
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* XXX: NB: Can this ever happen?!
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* smos@ get_interface_gateway() also succeeds for
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* static gateways, thus they need to be excluded
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*/
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if(is_array($config['gateways']['gateway_item'])) {
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foreach($config['gateways']['gateway_item'] as $gateway_item) {
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if($gateway_item['gateway'] == $gateway['gateway']) {
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continue 2;
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}
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}
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}
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/* retrieve a proper monitor IP? */
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if(is_ipaddr($config['interfaces'][$ifname]['monitorip'])) {
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$gateway['monitor'] = $config['interfaces'][$ifname]['monitorip'];
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} else {
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$gateway['monitor'] = $gateway['gateway'];
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}
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$gateway['interface'] = get_real_interface($ifname);
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$gateway['name'] = "{$ifname}";
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$gateway['descr'] = "Interface {$friendly} Gateway";
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$gateway['attribute'] = "system";
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$gateways_arr[$ifname] = $gateway;
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}
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}
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/* tack on all the hard defined gateways as well */
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if(is_array($config['gateways']['gateway_item'])) {
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$i = 0;
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foreach($config['gateways']['gateway_item'] as $gateway) {
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if($gateway['monitor'] == "") {
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$gateway['monitor'] = $gateway['gateway'];
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}
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/* include the gateway index as the attribute */
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$gateway['interface'] = convert_friendly_interface_to_real_interface_name($gateway['interface']);
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$gateway['attribute'] = "$i";
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$gateways_arr[$gateway['name']] = $gateway;
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$i++;
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}
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}
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return($gateways_arr);
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}
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/* return a array with all gateway groups with name as key
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* All gateway groups will be processed before returning the array.
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*/
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function return_gateway_groups_array() {
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global $config, $g;
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/* fetch the current gateways status */
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$gateways_status = return_gateways_status();
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$gateways_arr = return_gateways_array();
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$gateway_groups_array = array();
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if (is_array($config['gateways']['gateway_group'])) {
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foreach($config['gateways']['gateway_group'] as $group) {
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/* create array with group gateways members seperated by tier */
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$tiers = array();
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foreach($group['item'] as $item) {
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$itemsplit = explode("|", $item);
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$tier = $itemsplit[1];
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$gwname = $itemsplit[0];
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/* check if the gateway is available before adding it to the array */
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foreach($gateways_status as $status) {
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if(($status['name'] != $gwname)) {
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continue;
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}
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if (preg_match("/down/i", $status['status'])) {
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log_error("MONITOR: $gwname has high latency, removing from routing group");
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} elseif (preg_match("/loss/i", $status['status'])) {
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if (strstr($group['trigger'], "loss")) {
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/* packet loss */
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log_error("MONITOR: $gwname has packet loss, removing from routing group");
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} else {
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$tiers[$tier][] = $gwname;
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}
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} elseif (preg_match("/delay/i", $status['status'])) {
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if (strstr($group['trigger'] , "latency")) {
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/* high latency */
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log_error("MONITOR: $gwname has high latency, removing from routing group");
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} else {
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$tiers[$tier][] = $gwname;
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}
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} elseif (preg_match("/none/i", $status['status'])) {
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/* Online add member */
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$tiers[$tier][] = $gwname;
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}
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}
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}
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332
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$tiers_count = count($tiers);
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333
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if($tiers_count == 0) {
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/* Oh dear, we have no members! Engage Plan B */
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log_error("All gateways are unavailable, proceeding with configured XML settings!");
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foreach($group['item'] as $item) {
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foreach($group['item'] as $item) {
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$itemsplit = explode("|", $item);
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$tier = $itemsplit[1];
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$gwname = $itemsplit[0];
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$tiers[$tier][] = $gwname;
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}
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343
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}
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344
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}
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345
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/* sort the tiers array by the tier key */
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346
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ksort($tiers);
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347
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/* we do not really foreach the tiers as we stop after the first tier */
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348
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foreach($tiers as $tiernr => $tier) {
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349
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/* process all gateways in this tier */
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350
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$member_count = count($tier);
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351
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foreach($tier as $tiernr => $member) {
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352
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/* determine interface gateway */
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foreach($gateways_arr as $name => $gateway) {
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if($gateway['name'] == $member) {
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$int = $gateway['interface'];
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if(is_ipaddr($gateway['gateway']))
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357
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$gatewayip = $gateway['gateway'];
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else
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359
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$gatewayip = lookup_gateway_ip_by_name($gateway['gateway']);
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360
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break;
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361
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}
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362
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}
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363
|
if (($int <> "") && is_ipaddr($gatewayip)) {
|
|
364
|
$gateway_groups_array[$group['name']][$tiernr]['int'] = "$int";
|
|
365
|
$gateway_groups_array[$group['name']][$tiernr]['gwip'] = "$gatewayip";
|
|
366
|
}
|
|
367
|
}
|
|
368
|
/* we should have the 1st available tier now, exit stage left */
|
|
369
|
break;
|
|
370
|
}
|
|
371
|
}
|
|
372
|
}
|
|
373
|
return($gateway_groups_array);
|
|
374
|
}
|
|
375
|
|
|
376
|
/* Update DHCP WAN Interface ip address in gateway group item */
|
|
377
|
function dhclient_update_gateway_groups_defaultroute($interface = "wan") {
|
|
378
|
global $config, $g;
|
|
379
|
foreach($config['gateways']['gateway_item'] as & $gw) {
|
|
380
|
if($gw['interface'] == $interface) {
|
|
381
|
$current_gw = get_interface_gateway($interface);
|
|
382
|
if($gw['gateway'] <> $current_gw) {
|
|
383
|
$gw['gateway'] = $current_gw;
|
|
384
|
$changed = true;
|
|
385
|
}
|
|
386
|
}
|
|
387
|
}
|
|
388
|
if($changed && $current_gw)
|
|
389
|
write_config("Updating gateway group gateway for $interface - new gateway is $current_gw");
|
|
390
|
}
|
|
391
|
|
|
392
|
function lookup_gateway_ip_by_name($name) {
|
|
393
|
global $config;
|
|
394
|
if(is_array($config['gateways']['gateway_item'])) {
|
|
395
|
foreach($config['gateways']['gateway_item'] as $gateway) {
|
|
396
|
if($gateway['name'] == $name) {
|
|
397
|
$gatewayip = $gateway['gateway'];
|
|
398
|
//$interfacegw = $gateway['interface'];
|
|
399
|
return($gatewayip);
|
|
400
|
}
|
|
401
|
}
|
|
402
|
} else {
|
|
403
|
return(false);
|
|
404
|
}
|
|
405
|
}
|
|
406
|
|
|
407
|
function lookup_gateway_monitor_ip_by_name($name) {
|
|
408
|
global $config;
|
|
409
|
$gateways_arr = return_gateways_array();
|
|
410
|
|
|
411
|
foreach($gateways_arr as $gateway) {
|
|
412
|
if($gateway['name'] == "$name") {
|
|
413
|
$monitorip = $gateway['monitor'];
|
|
414
|
if($monitorip == "")
|
|
415
|
$monitorip = $gateway['gateway'];
|
|
416
|
|
|
417
|
return($monitorip);
|
|
418
|
}
|
|
419
|
}
|
|
420
|
return(false);
|
|
421
|
}
|
|
422
|
|
|
423
|
function lookup_gateway_interface_by_name($name) {
|
|
424
|
global $config;
|
|
425
|
$gateways_arr = return_gateways_array();
|
|
426
|
|
|
427
|
foreach($gateways_arr as $gateway) {
|
|
428
|
if($gateway['name'] == "$name") {
|
|
429
|
$gatewayip = $gateway['gateway'];
|
|
430
|
$interfacegw = $gateway['interface'];
|
|
431
|
return($interfacegw);
|
|
432
|
}
|
|
433
|
}
|
|
434
|
return(false);
|
|
435
|
}
|
|
436
|
|
|
437
|
function get_interface_gateway($interface) {
|
|
438
|
global $config, $g;
|
|
439
|
|
|
440
|
$iflist = get_configured_interface_with_descr();
|
|
441
|
/*
|
|
442
|
* XXX: BUG: This is silly at first, but we may be called with the interface
|
|
443
|
* descr for no apparent reason!!!
|
|
444
|
* Probably one of those silly strtoupper() legacy stuff!
|
|
445
|
*/
|
|
446
|
foreach ($iflist as $ifent => $ifdesc) {
|
|
447
|
if ($ifent == $interface || $ifdesc == $interface) {
|
|
448
|
$interface = $ifent;
|
|
449
|
break;
|
|
450
|
}
|
|
451
|
}
|
|
452
|
|
|
453
|
$gw = NULL;
|
|
454
|
|
|
455
|
$gwcfg = $config['interfaces'][$interface];
|
|
456
|
if (is_ipaddr($gwcfg['gateway']))
|
|
457
|
$gw = $gwcfg['gateway'];
|
|
458
|
else if (!empty($gwcfg['gateway']))
|
|
459
|
$gw = lookup_gateway_ip_by_name($gwcfg['gateway']);
|
|
460
|
|
|
461
|
// for dynamic interfaces we handle them through the $interface_router file.
|
|
462
|
if (!is_ipaddr($gw)) {
|
|
463
|
$realif = get_real_interface($interface);
|
|
464
|
if (file_exists("{$g['tmp_path']}/{$realif}_router")) {
|
|
465
|
$gw = file_get_contents("{$g['tmp_path']}/{$realif}_router");
|
|
466
|
$gw = rtrim($gw);
|
|
467
|
}
|
|
468
|
}
|
|
469
|
|
|
470
|
/* return gateway */
|
|
471
|
return $gw;
|
|
472
|
}
|
|
473
|
|
|
474
|
?>
|