pfSense

<?php

/*

  Redistribution and use in source and binary forms, with or without

  modification, are permitted provided that the following conditions are met:

  2. Redistributions in binary form must reproduce the above copyright

  notice, this list of conditions and the following disclaimer in the

  documentation and/or other materials provided with the distribution.

  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,

  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY

  AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

  AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,

  OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

  POSSIBILITY OF SUCH DAMAGE.

	pfSense_MODULE:	routing

 * creates monitoring configuration file

 */

function setup_gateways_monitor() {

		$config['gateways']['gateway_item'] = array();

	$a_gateway_item = &$config['gateways']['gateway_item'];

	$a_settings['latencylow'] = "200";

	$a_settings['latencyhigh'] = "500";

	$a_settings['losslow'] = "10";

	$a_settings['losshigh'] = "20";

	$apingerconfig = <<<EOD

# pfSense apinger configuration file. Automatically Generated!

## User and group the pinger should run as

group "wheel"

## Mailer to use (default: "/usr/lib/sendmail -t")

#mailer "/var/qmail/bin/qmail-inject" 

## Location of the pid-file (default: "/var/run/apinger.pid")

pid_file "{$g['varrun_path']}/apinger.pid"

## Format of timestamp (%s macro) (default: "%b %d %H:%M:%S")

#timestamp_format "%Y%m%d%H%M%S"

status {

	## File where the status information whould be written to

	file "/tmp/apinger.status"

	## Interval between file updates

	## when 0 or not set, file is written only when SIGUSR1 is received

	interval 10s

}

########################################

# RRDTool status gathering configuration

# Interval between RRD updates

rrd interval 60s;

## These parameters can be overriden in a specific alarm configuration

alarm default { 

	command off "/usr/bin/touch /tmp/filter_dirty"

}

## "Down" alarm definition. 

## This alarm will be fired when target doesn't respond for 30 seconds.

alarm down "down" {

	time 10s

}

## "Delay" alarm definition. 

## This alarm will be fired when responses are delayed more than 200ms

## it will be canceled, when the delay drops below 100ms

alarm delay "delay" {

	delay_high {$a_settings['latencyhigh']}ms

## "Loss" alarm definition. 

## This alarm will be fired when packet loss goes over 20%

## it will be canceled, when the loss drops below 10%

alarm loss "loss" {

	percent_high {$a_settings['losshigh']}

target default {

	## How often the probe should be sent	

	interval 1s

	## How many replies should be used to compute average delay 

	## for controlling "delay" alarms

	avg_delay_samples 10

	## How many probes should be used to compute average loss

	avg_loss_samples 50

	## The delay (in samples) after which loss is computed

	## without this delays larger than interval would be treated as loss

	avg_loss_delay_samples 20

	## Names of the alarms that may be generated for the target

	alarms "down","delay","loss"

	## Location of the RRD

## Targets to probe

## Each one defined with:

## target <address> { <parameter>... }

## The parameters are those described above in the "target default" section

## plus the "description" parameter.

## the <address> should be IPv4 or IPv6 address (not hostname!)

EOD;

	/* add static routes for each gateway with their monitor IP */

					$i++;

				}

				continue;

				$gwifip = "127.0.0.1";

			} else {

				$gwifip = find_interface_ip($gateway['interface']);

			}

				continue; //Skip this target

			$apingercfg .= "target \"{$gateway['monitor']}\" {\n";

			$apingercfg .= "	description \"{$gateway['name']}\"\n";

			$override = false;

			if (!empty($gwref['lowloss'])) {

				$alarmscfg .= "alarm loss \"{$gateway['name']}loss\" {\n";

				$alarmscfg .= "\tpercent_low {$gwref['losslow']}\n";

        			$alarmscfg .= "\tpercent_high {$gwref['losshigh']}\n";

				$alarmscfg .= "}\n";

				$alarms .= "\"{$gateway['name']}loss\"";

				$override = true;

                                if ($override == true)

                                        $alarms .= ",";

                                $alarms .= "\"loss\"";

                                $override = true;

                        }

				$alarmscfg .= "alarm delay \"{$gateway['name']}delay\" {\n";

				$alarmscfg .= "\tdelay_low {$gwref['latencylow']}ms\n";

				$alarmscfg .= "\tdelay_high {$gwref['latencyhigh']}ms\n";

				$alarmscfg .= "}\n";

				if ($override == true)

					$alarms .= ",";

				$alarms .= "\"{$gateway['name']}delay\"";

				$override = true;

				if ($override == true)

                                        $alarms .= ",";

				$alarms .= "\"delay\"";

				$override = true;

			if (!empty($gwref['down'])) {

				$alarmscfg .= "alarm down \"{$gateway['name']}down\" {\n";

				$alarmscfg .= "\ttime {$gwref['down']}s\n";

				$alarmscfg .= "}\n";

				if ($override == true)

                                        $alarms .= ",";

				$alarms .= "\"{$gateway['name']}down\"";

				$override = true;

                                if ($override == true)

                                        $alarms .= ",";

                                $alarms .= "\"down\"";

                                $override = true;

                        }

				$apingercfg .= "\talarms override {$alarms};\n";

			$apingercfg .= "	rrd file \"{$g['vardb_path']}/rrd/{$gateway['name']}-quality.rrd\"\n";

			$apingercfg .= "}\n";

			$apingercfg .= "\n";

				/* if the gateway is the same as the monitor we do not add a

				 * route as this will break the routing table */

				continue;

			} else {

						" " . escapeshellarg($gateway['gateway']));

		}

		$apingerconfig .= $apingercfg;

	fwrite($fd, $apingerconfig);

	fclose($fd);

	if (is_dir("{$g['tmp_path']}"))

		chmod("{$g['tmp_path']}", 01777);

		mkdir("{$g['vardb_path']}/rrd", 0775);

	}

		chown("{$g['vardb_path']}/rrd", "nobody");

	/* start a new apinger process */

	mwexec_bg("/usr/local/sbin/apinger -c {$g['varetc_path']}/apinger.conf");

}

/* return the status of the apinger targets as a array */

function return_gateways_status() {

	$apingerstatus = array();

		$target = $info[0];

		$status[$target]['name'] = $info[2];

		$status[$target]['lastcheck'] = $info[5] ? date('r', $info[5]) : date('r');

		$status[$target]['delay'] = empty($info[6]) ? 0 : $info[6];

		$status[$target]['loss'] = empty($info[7]) ? "0.0%" : $info[7] . "";

		$status[$target]['status'] = trim($info[8]);

	return($status);

	/* Loop through all interfaces with a gateway and add it to a array */

	$i = 0;

	if(is_array($config['gateways']['gateway_item'])) {

		foreach($config['gateways']['gateway_item'] as $gateway) {

			if($gateway['gateway'] == "dynamic") {

				$gateway['gateway'] = get_interface_gateway($gateway['interface']);

				/* no IP address found, set to dynamic */

				if(! is_ipaddr($gateway['gateway'])) {

					$gateway['gateway'] = "dynamic";

				}

			if($gateway['monitor'] == "") {

				$gateway['monitor'] = $gateway['gateway'];

			}

			/* include the gateway index as the attribute */

			$gateway['attribute'] = "$i";

			$gateways_arr[$gateway['name']] = $gateway;

			$i++;

		}

	foreach($iflist as $ifname => $friendly ) {

		if(! interface_has_gateway($ifname)) {

			continue;

		}

		$gateway = array();

		$gateway['dynamic'] = false;

		$gateway['gateway'] = get_interface_gateway($ifname, $gateway['dynamic']);

		$gateway['interface'] = get_real_interface($ifname);

		$gateway['friendlyiface'] = $ifname;

		}

		foreach($gateways_arr as $gateway_item) {

				if ($gateway_item['gateway'] == $gateway['gateway'])

					continue 2;

				if ($gateway_item['gateway'] == "dynamic")

					continue 2;

			}

		$interface = $config['interfaces'][$ifname];

		if(is_ipaddr($interface['monitorip'])) {

			$gateway['monitor'] = $interface['monitorip'];

		} else {

			$gateway['monitor'] = $gateway['gateway'];

		$gateways_arr[$ifname] = $gateway;

		$i++;

}

 * All gateway groups will be processed before returning the array.

*/

function return_gateway_groups_array() {

	/* fetch the current gateways status */

	$gateways_status = return_gateways_status();

	$gateways_arr = return_gateways_array();

	$gateway_groups_array = array();

	if (is_array($config['gateways']['gateway_group'])) {

		foreach($config['gateways']['gateway_group'] as $group) {

			/* create array with group gateways members seperated by tier */

			$tiers = array();

			foreach($group['item'] as $item) {

				$itemsplit = explode("|", $item);

				$tier = $itemsplit[1];

				$gwname = $itemsplit[0];

				/* check if the gateway is available before adding it to the array */

				foreach($gateways_status as $status) {

					}

						log_error($msg);

						notify_via_growl($msg);

							/* packet loss */

							log_error($msg);

							notify_via_growl($msg);

							/* high latency */

							log_error($msg);

							notify_via_growl($msg);

							$tiers[$tier][] = $gwname;

						}

						$tiers[$tier][] = $gwname;

				}

			}

			$tiers_count = count($tiers);

			if($tiers_count == 0) {

				/* Oh dear, we have no members! Engage Plan B */

				log_error($msg);

				notify_via_growl($msg);

					$tier = $itemsplit[1];

					$gwname = $itemsplit[0];

					$tiers[$tier][] = $gwname;

			}

			ksort($tiers);

						$gateway = $gateways_arr[$member];

						$int = $gateway['interface'];

						$gatewayip = "";

						if(is_ipaddr($gateway['gateway'])) 

							$gatewayip = $gateway['gateway'];

						else if ($int <> "")

							$gatewayip = get_interface_gateway($gateway['friendlyiface']);

					if (($int <> "") && is_ipaddr($gatewayip)) {

						$groupmember['int']  = "$int";

						$groupmember['gwip']  = "$gatewayip";

						$groupmember['weight']  = isset($gateway['weight']) ? $gateway['weight'] : 1;

				}

				/* we should have the 1st available tier now, exit stage left */

				break;

			}

		}

	}

function dhclient_update_gateway_groups_defaultroute($interface = "wan") {

	global $config, $g;

	foreach($config['gateways']['gateway_item'] as & $gw) {	

		if($gw['interface'] == $interface) {

			$current_gw = get_interface_gateway($interface);

			if($gw['gateway'] <> $current_gw) {

				$gw['gateway'] = $current_gw;

				$changed = true;

			}

		}

	}

	if($changed && $current_gw)

		write_config("Updating gateway group gateway for $interface - new gateway is $current_gw");

}

                if ($gw['name'] == $name)

                        return $gw['gateway'];

        }

	return false;

function lookup_gateway_monitor_ip_by_name($name) {

		$gateway = $gateways_arr[$name];

		if ($gateway['gateway'] == "dynamic")

			$gateway['monitor'] = "127.0.0.2";

        return (false);

function lookup_gateway_interface_by_name($name) {

	if (!empty($gateways_arr[$name])) {

		//$gatewayip = $gateway['gateway'];

		$interfacegw = $gateway['interface'];

		return ($interfacegw);

        return (false);

        $gw = NULL;

        $gwcfg = $config['interfaces'][$interface];

        if (is_ipaddr($gwcfg['gateway']))

                $gw = $gwcfg['gateway'];

               	foreach($config['gateways']['gateway_item'] as $gateway) {

                        if ($gateway['name'] == $gwcfg['gateway']) {

                                $gw = $gateway['gateway'];

				break;

			}

                }

	}

        // for dynamic interfaces we handle them through the $interface_router file.

                if (file_exists("{$g['tmp_path']}/{$realif}_router")) {

                        $gw = file_get_contents("{$g['tmp_path']}/{$realif}_router");

                        $gw = rtrim($gw);

        }

        /* return gateway */