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<?php
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/*
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Copyright (C) 2008 Bill Marquette, Seth Mos
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Copyright (C) 2010 Ermal Lu?i
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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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pfSense_BUILDER_BINARIES: /usr/bin/killall /sbin/route /usr/local/sbin/apinger
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pfSense_MODULE: routing
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*/
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/*
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* Creates monitoring configuration file and
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* adds apropriate static routes.
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*/
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function setup_gateways_monitor() {
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global $config, $g;
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$gateways_arr = return_gateways_array();
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if (!is_array($gateways_arr)) {
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log_error("No gateways to monitor. Apinger will not be run.");
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killbypid("{$g['varrun_path']}/apinger.pid");
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@unlink("{$g['tmp_path']}/apinger.status");
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return;
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}
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/* Default settings. Probably should move to globals.inc? */
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$a_settings = array();
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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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$fd = fopen("{$g['varetc_path']}/apinger.conf", "w");
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$apingerconfig = <<<EOD
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# pfSense apinger configuration file. Automatically Generated!
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## User and group the pinger should run as
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user "root"
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group "wheel"
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## Mailer to use (default: "/usr/lib/sendmail -t")
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#mailer "/var/qmail/bin/qmail-inject"
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## Location of the pid-file (default: "/var/run/apinger.pid")
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pid_file "{$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 "{$g['tmp_path']}/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 5s
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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/local/sbin/pfSctl -c 'filter reload'"
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command off "/usr/local/sbin/pfSctl -c 'filter reload'"
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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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EOD;
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foreach($gateways_arr as $name => $gateway) {
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if (empty($gateway['monitor']) || !is_ipaddr($gateway['monitor'])) {
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if (is_ipaddr($gateway['gateway']))
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$gateway['monitor'] = $gateway['gateway'];
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else /* No chance to get an ip to monitor skip target. */
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continue;
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}
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/* Interface ip is needed since apinger will bind a socket to it. */
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$gwifip = find_interface_ip($gateway['interface'], true);
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if (!is_ipaddr($gwifip))
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continue; //Skip this target
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$apingercfg = "target \"{$gateway['monitor']}\" {\n";
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$apingercfg .= " description \"{$name}\"\n";
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$apingercfg .= " srcip \"{$gwifip}\"\n";
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$alarms = "";
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$alarmscfg = "";
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$override = false;
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if (!empty($gateway['lowloss'])) {
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$alarmscfg .= "alarm loss \"{$name}loss\" {\n";
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$alarmscfg .= "\tpercent_low {$gateway['losslow']}\n";
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$alarmscfg .= "\tpercent_high {$gateway['losshigh']}\n";
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$alarmscfg .= "}\n";
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$alarms .= "\"{$name}loss\"";
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$override = true;
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} else {
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if ($override == true)
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$alarms .= ",";
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$alarms .= "\"loss\"";
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$override = true;
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}
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if (!empty($gateway['latencylow'])) {
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$alarmscfg .= "alarm delay \"{$name}delay\" {\n";
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$alarmscfg .= "\tdelay_low {$gateway['latencylow']}ms\n";
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$alarmscfg .= "\tdelay_high {$gateway['latencyhigh']}ms\n";
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$alarmscfg .= "}\n";
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if ($override == true)
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$alarms .= ",";
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$alarms .= "\"{$name}delay\"";
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$override = true;
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} else {
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if ($override == true)
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$alarms .= ",";
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$alarms .= "\"delay\"";
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$override = true;
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}
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if (!empty($gateway['down'])) {
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$alarmscfg .= "alarm down \"{$name}down\" {\n";
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$alarmscfg .= "\ttime {$gateway['down']}s\n";
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$alarmscfg .= "}\n";
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if ($override == true)
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$alarms .= ",";
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$alarms .= "\"{$name}down\"";
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$override = true;
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} else {
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if ($override == true)
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$alarms .= ",";
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$alarms .= "\"down\"";
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$override = true;
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}
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if ($override == true)
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$apingercfg .= "\talarms override {$alarms};\n";
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$apingercfg .= " rrd file \"{$g['vardb_path']}/rrd/{$gateway['name']}-quality.rrd\"\n";
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$apingercfg .= "}\n";
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$apingercfg .= "\n";
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/*
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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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* Add static routes for each gateway with their monitor IP
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* not strictly necessary but is a added level of protection.
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*/
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if (is_ipaddr($gateway['gateway']) && $gateway['monitor'] != $gateway['gateway']) {
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log_error("Removing static route for monitor {$gateway['monitor']} and adding a new route through {$gateway['gateway']}");
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mwexec("/sbin/route delete -host " . escapeshellarg($gateway['monitor']), true);
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mwexec("/sbin/route add -host " . escapeshellarg($gateway['monitor']) .
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" " . escapeshellarg($gateway['gateway']));
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}
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$apingerconfig .= $alarmscfg;
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$apingerconfig .= $apingercfg;
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}
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fwrite($fd, $apingerconfig);
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fclose($fd);
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killbypid("{$g['varrun_path']}/apinger.pid");
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if (is_dir("{$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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mkdir("{$g['vardb_path']}/rrd", 0775);
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@chown("{$g['vardb_path']}/rrd", "nobody");
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/* start a new apinger process */
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@unlink("{$g['tmp_path']}/apinger.status");
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mwexec_bg("/usr/local/sbin/apinger -c {$g['varetc_path']}/apinger.conf");
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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($byname = false) {
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global $config, $g;
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$apingerstatus = array();
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if (file_exists("{$g['tmp_path']}/apinger.status")) {
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$apingerstatus = file("{$g['tmp_path']}/apinger.status");
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}
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$status = array();
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foreach($apingerstatus as $line) {
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$info = explode("|", $line);
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if ($byname == false)
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$target = $info[0];
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else
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$target = $info[2];
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$status[$target]['monitorip'] = $info[0];
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$status[$target]['srcip'] = $info[1];
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$status[$target]['name'] = $info[2];
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$status[$target]['lastcheck'] = $info[5] ? date('r', $info[5]) : date('r');
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$status[$target]['delay'] = empty($info[6]) ? 0 : $info[6];
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$status[$target]['loss'] = empty($info[7]) ? "0.0%" : $info[7] . "";
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$status[$target]['status'] = trim($info[8]);
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}
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return($status);
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}
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/* Return all configured gateways on the system */
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function return_gateways_array($disabled = false) {
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global $config, $g;
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$gateways_arr = array();
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$i = 0;
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/* Process/add all the configured gateways. */
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if (is_array($config['gateways']['gateway_item'])) {
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foreach($config['gateways']['gateway_item'] as $gateway) {
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if(empty($gateway['gateway']) || $gateway['gateway'] == "dynamic") {
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$gateway['gateway'] = get_interface_gateway($gateway['interface']);
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/* no IP address found, set to dynamic */
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if(! is_ipaddr($gateway['gateway']))
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$gateway['gateway'] = "dynamic";
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$gateway['dynamic'] = true;
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}
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if(empty($gateway['monitor']))
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$gateway['monitor'] = $gateway['gateway'];
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$gateway['friendlyiface'] = $gateway['interface'];
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$gateway['interface'] = get_real_interface($gateway['interface']);
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/* Some interface like wan might be default but have no info recorded
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* the config.
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*/
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if ($gateway['friendlyiface'] == "wan" && !isset($gateway['defaultgw'])) {
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if (file_exists("{$g['tmp_path']}/{$gateway['interface']}_defaultgw"))
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$gateway['defaultgw'] = true;
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}
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/* include the gateway index as the attribute */
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$gateway['attribute'] = $i;
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299
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$gateways_arr[$gateway['name']] = $gateway;
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$i++;
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}
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}
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/* Loop through all interfaces with a gateway and add it to a array */
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if ($disabled == false)
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$iflist = get_configured_interface_with_descr();
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else
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$iflist = get_configured_interface_with_descr(false, true);
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310
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/* Process/add dynamic gateways. */
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foreach($iflist as $ifname => $friendly ) {
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if(! interface_has_gateway($ifname))
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continue;
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315
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$ifcfg = $config['interfaces'][$ifname];
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317
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if (!empty($ifcfg['ipaddr']) && is_ipaddr($ifcfg['ipaddr']))
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continue;
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319
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320
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$gateway = array();
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$gateway['dynamic'] = false;
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$gateway['gateway'] = get_interface_gateway($ifname, $gateway['dynamic']);
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$gateway['interface'] = get_real_interface($ifname);
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$gateway['friendlyiface'] = $ifname;
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$gateway['name'] = $friendly;
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$gateway['attribute'] = "system";
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if ($gateway['dynamic'] == "default") {
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$gateway['defaultgw'] = true;
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$gateway['dynamic'] = true;
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}
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/* Loopback dummy for dynamic interfaces without a IP */
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if (!is_ipaddr($gateway['gateway']) && $gateway['dynamic'] == true)
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$gateway['gateway'] = "dynamic";
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335
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/* automatically skip known static and dynamic gateways we have a array entry for */
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foreach($gateways_arr as $gateway_item) {
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if ($ifname == $gateway_item['friendlyiface'] && $friendly == $gateway_item['name'])
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continue 2;
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}
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342
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if (is_ipaddr($gateway['gateway']))
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$gateway['monitor'] = $gateway['gateway'];
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$gateway['descr'] = "Interface {$friendly} Dynamic Gateway";
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$gateways_arr[$friendly] = $gateway;
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}
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348
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349
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return($gateways_arr);
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}
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351
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352
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/*
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353
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* Return an array with all gateway groups with name as key
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354
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* All gateway groups will be processed before returning the array.
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355
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*/
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356
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function return_gateway_groups_array() {
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357
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global $config, $g;
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358
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359
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/* fetch the current gateways status */
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360
|
$gateways_status = return_gateways_status(true);
|
|
361
|
$gateways_arr = return_gateways_array();
|
|
362
|
$gateway_groups_array = array();
|
|
363
|
|
|
364
|
if (is_array($config['gateways']['gateway_group'])) {
|
|
365
|
foreach($config['gateways']['gateway_group'] as $group) {
|
|
366
|
/* create array with group gateways members seperated by tier */
|
|
367
|
$tiers = array();
|
|
368
|
$backupplan = array();
|
|
369
|
foreach($group['item'] as $item) {
|
|
370
|
$itemsplit = explode("|", $item);
|
|
371
|
$tier = $itemsplit[1];
|
|
372
|
$gwname = $itemsplit[0];
|
|
373
|
|
|
374
|
/* Do it here rather than reiterating again the group in case no member is up. */
|
|
375
|
$backupplan[$tier][] = $gwname;
|
|
376
|
|
|
377
|
/* check if the gateway is available before adding it to the array */
|
|
378
|
if (!empty($gateways_status[$gwname])) {
|
|
379
|
$status = $gateways_status[$gwname];
|
|
380
|
$gwdown = false;
|
|
381
|
if (stristr($status['status'], "down")) {
|
|
382
|
$msg = "MONITOR: {$gwname} has high latency, removing from routing group";
|
|
383
|
$gwdown = true;
|
|
384
|
} else if (stristr($status['status'], "loss") && strstr($group['trigger'], "loss")) {
|
|
385
|
/* packet loss */
|
|
386
|
$msg = "MONITOR: {$gwname} has packet loss, removing from routing group";
|
|
387
|
$gwdown = true;
|
|
388
|
} else if (stristr($status['status'], "delay") && strstr($group['trigger'] , "latency")) {
|
|
389
|
/* high latency */
|
|
390
|
$msg = "MONITOR: {$gwname} has high latency, removing from routing group";
|
|
391
|
$gwdown = true;
|
|
392
|
}
|
|
393
|
if ($gwdown == true) {
|
|
394
|
log_error($msg);
|
|
395
|
notify_via_growl($msg);
|
|
396
|
} else
|
|
397
|
/* Online add member */
|
|
398
|
$tiers[$tier][] = $gwname;
|
|
399
|
}
|
|
400
|
}
|
|
401
|
$tiers_count = count($tiers);
|
|
402
|
if($tiers_count == 0) {
|
|
403
|
/* Oh dear, we have no members! Engage Plan B */
|
|
404
|
$msg = "Gateways status could not be determined, considering all as up/active.";
|
|
405
|
log_error($msg);
|
|
406
|
notify_via_growl($msg);
|
|
407
|
$tiers = $backupplan;
|
|
408
|
}
|
|
409
|
/* sort the tiers array by the tier key */
|
|
410
|
ksort($tiers);
|
|
411
|
|
|
412
|
/* we do not really foreach the tiers as we stop after the first tier */
|
|
413
|
foreach($tiers as $tier) {
|
|
414
|
/* process all gateways in this tier */
|
|
415
|
foreach($tier as $member) {
|
|
416
|
/* determine interface gateway */
|
|
417
|
if (isset($gateways_arr[$member])) {
|
|
418
|
$gateway = $gateways_arr[$member];
|
|
419
|
$int = $gateway['interface'];
|
|
420
|
$gatewayip = "";
|
|
421
|
if(is_ipaddr($gateway['gateway']))
|
|
422
|
$gatewayip = $gateway['gateway'];
|
|
423
|
else if ($int <> "")
|
|
424
|
$gatewayip = get_interface_gateway($gateway['friendlyiface']);
|
|
425
|
|
|
426
|
if (($int <> "") && is_ipaddr($gatewayip)) {
|
|
427
|
$groupmember = array();
|
|
428
|
$groupmember['int'] = $int;
|
|
429
|
$groupmember['gwip'] = $gatewayip;
|
|
430
|
$groupmember['weight'] = isset($gateway['weight']) ? $gateway['weight'] : 1;
|
|
431
|
$gateway_groups_array[$group['name']][] = $groupmember;
|
|
432
|
}
|
|
433
|
}
|
|
434
|
}
|
|
435
|
/* we should have the 1st available tier now, exit stage left */
|
|
436
|
break;
|
|
437
|
}
|
|
438
|
}
|
|
439
|
}
|
|
440
|
return ($gateway_groups_array);
|
|
441
|
}
|
|
442
|
|
|
443
|
/* Update DHCP WAN Interface ip address in gateway group item */
|
|
444
|
function dhclient_update_gateway_groups_defaultroute($interface = "wan") {
|
|
445
|
global $config, $g;
|
|
446
|
foreach($config['gateways']['gateway_item'] as & $gw) {
|
|
447
|
if($gw['interface'] == $interface) {
|
|
448
|
$current_gw = get_interface_gateway($interface);
|
|
449
|
if($gw['gateway'] <> $current_gw) {
|
|
450
|
$gw['gateway'] = $current_gw;
|
|
451
|
$changed = true;
|
|
452
|
}
|
|
453
|
}
|
|
454
|
}
|
|
455
|
if($changed && $current_gw)
|
|
456
|
write_config("Updating gateway group gateway for $interface - new gateway is $current_gw");
|
|
457
|
}
|
|
458
|
|
|
459
|
function lookup_gateway_ip_by_name($name) {
|
|
460
|
|
|
461
|
$gateways_arr = return_gateways_array();
|
|
462
|
foreach ($gateways_arr as $gname => $gw) {
|
|
463
|
if ($gw['name'] == $name || $gname == $name)
|
|
464
|
return $gw['gateway'];
|
|
465
|
}
|
|
466
|
|
|
467
|
return false;
|
|
468
|
}
|
|
469
|
|
|
470
|
function lookup_gateway_monitor_ip_by_name($name) {
|
|
471
|
|
|
472
|
$gateways_arr = return_gateways_array();
|
|
473
|
if (!empty($gateways_arr[$name])) {
|
|
474
|
$gateway = $gateways_arr[$name];
|
|
475
|
if(!is_ipaddr($gateway['monitor']))
|
|
476
|
return $gateway['gateway'];
|
|
477
|
|
|
478
|
return $gateway['monitor'];
|
|
479
|
}
|
|
480
|
|
|
481
|
return (false);
|
|
482
|
}
|
|
483
|
|
|
484
|
function lookup_gateway_interface_by_name($name) {
|
|
485
|
|
|
486
|
$gateways_arr = return_gateways_array();
|
|
487
|
if (!empty($gateways_arr[$name])) {
|
|
488
|
$interfacegw = $gateway['interface'];
|
|
489
|
return ($interfacegw);
|
|
490
|
}
|
|
491
|
|
|
492
|
return (false);
|
|
493
|
}
|
|
494
|
|
|
495
|
function get_interface_gateway($interface, &$dynamic = false) {
|
|
496
|
global $config, $g;
|
|
497
|
|
|
498
|
$gw = NULL;
|
|
499
|
|
|
500
|
$gwcfg = $config['interfaces'][$interface];
|
|
501
|
if (!empty($gwcfg['gateway']) && is_array($config['gateways']['gateway_item'])) {
|
|
502
|
foreach($config['gateways']['gateway_item'] as $gateway) {
|
|
503
|
if ($gateway['name'] == $gwcfg['gateway']) {
|
|
504
|
$gw = $gateway['gateway'];
|
|
505
|
break;
|
|
506
|
}
|
|
507
|
}
|
|
508
|
}
|
|
509
|
|
|
510
|
// for dynamic interfaces we handle them through the $interface_router file.
|
|
511
|
if (!is_ipaddr($gw) && !is_ipaddr($gwcfg['ipaddr'])) {
|
|
512
|
$realif = get_real_interface($interface);
|
|
513
|
if (file_exists("{$g['tmp_path']}/{$realif}_router")) {
|
|
514
|
$gw = trim(file_get_contents("{$g['tmp_path']}/{$realif}_router"), " \n");
|
|
515
|
$dynamic = true;
|
|
516
|
}
|
|
517
|
if (file_exists("{$g['tmp_path']}/{$realif}_defaultgw"))
|
|
518
|
$dynamic = "default";
|
|
519
|
|
|
520
|
|
|
521
|
}
|
|
522
|
|
|
523
|
/* return gateway */
|
|
524
|
return ($gw);
|
|
525
|
}
|
|
526
|
|
|
527
|
?>
|