Fix IPv6 Prefix ID default value

. Always initialize it to 0 when it's undefined
. Remove unecessary initializations and checks
. Bump config version to 9.5
. Write an upgrade config function to initialize old configs properly

conf.default/config.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!-- pfSense default system configuration -->
 <pfsense>
-	<version>9.4</version>
+	<version>9.5</version>
 	<lastchange></lastchange>
 	<theme>pfsense_ng</theme>
 	<sysctl>

etc/inc/globals.inc

@@ -71,7 +71,7 @@ $g = array(
 	"disablecrashreporter" => false,
 	"crashreporterurl" => "http://crashreporter.pfsense.org/crash_reporter.php",
 	"debug" => false,
-	"latest_config" => "9.4",
+	"latest_config" => "9.5",
 	"nopkg_platforms" => array("cdrom"),
 	"minimum_ram_warning" => "101",
 	"minimum_ram_warning_text" => "128 MB",

etc/inc/interfaces.inc

@@ -3141,9 +3141,6 @@ function interface_track6_6rd_configure($interface = "lan", $lancfg) {
 	if (empty($lancfg['track6-interface']))
 		return;
 
-	if (!is_numeric($lancfg['track6-prefix-id']))
-		$lancfg['track6-prefix-id'] = 0;
-
 	$wancfg = $config['interfaces'][$lancfg['track6-interface']];
 	if (empty($wancfg)) {
 		log_error("Interface {$interface} tracking non-existant interface {$lancfg['track6-interface']}");
@@ -3211,9 +3208,6 @@ function interface_track6_6to4_configure($interface = "lan", $lancfg) {
 		return;
 	}
 
-	if (!is_numeric($lancfg['track6-prefix-id']))
-		$lancfg['track6-prefix-id'] = 0;
-
 	$ip4address = get_interface_ip($lancfg['track6-interface']);
 	if (!is_ipaddrv4($ip4address) || is_private_ip($ip4address)) {
 		log_error("The interface IPv4 '{$ip4address}' address on interface '{$lancfg['track6-interface']}' is not public, not configuring 6RD tunnel");
@@ -3265,9 +3259,6 @@ function interface_track6_dhcp6_configure($interface = "lan", $lancfg) {
 	if (empty($lancfg['track6-interface']))
 		return;
 
-	if (!is_numeric($lancfg['track6-prefix-id']))
-		$lancfg['track6-prefix-id'] = 0;
-
 	$wancfg = $config['interfaces'][$lancfg['track6-interface']];
 	if (empty($wancfg)) {
 		log_error("Interface {$interface} tracking non-existant interface {$lancfg['track6-interface']}");

etc/inc/upgrade_config.inc

@@ -3074,4 +3074,16 @@ function upgrade_093_to_094() {
 	}
 }
 
+function upgrade_094_to_095() {
+	global $config;
+
+	if (!isset($config['interfaces']) || !is_array($config['interfaces']))
+		return;
+
+	foreach ($config['interfaces'] as $iface => $cfg)
+		if (isset($cfg['ipaddrv6']) && ($cfg['ipaddrv6'] == "track6"))
+			if (!isset($cfg['track6-prefix-id']) || ($cfg['track6-prefix-id'] == ""))
+				$config['interfaces'][$iface]['track6-prefix-id'] = 0;
+}
+
 ?>

usr/local/www/interfaces.php

@@ -225,12 +225,11 @@ function remove_bad_chars($string) {
 	case "track6":
 		$pconfig['type6'] = "track6";
 		$pconfig['track6-interface'] = $wancfg['track6-interface'];
-		$pconfig['track6-prefix-id'] = $wancfg['track6-prefix-id'];
-		if ($wancfg['track6-prefix-id'] == "" || $wancfg['track6-prefix-id'] == "none") {
-			$pconfig['track6-prefix-id--hex'] = "";
-		} else {
-			$pconfig['track6-prefix-id--hex'] = sprintf("%x", $wancfg['track6-prefix-id']);
-		}
+		if ($wancfg['track6-prefix-id'] == "")
+			$pconfig['track6-prefix-id'] = 0;
+		else
+			$pconfig['track6-prefix-id'] = $wancfg['track6-prefix-id'];
+		$pconfig['track6-prefix-id--hex'] = sprintf("%x", $pconfig['track6-prefix-id']);
 		break;
 	case "6rd":
 		$pconfig['prefix-6rd'] = $wancfg['prefix-6rd'];
@@ -402,13 +401,10 @@ interface_sync_wireless_clones($wancfg, false);
 
 	unset($input_errors);
 	$pconfig = $_POST;
-	if ($pconfig['track6-prefix-id--hex'] === "") {
-		$pconfig['track6-prefix-id'] = "none";
-	} else if (is_numeric("0x" . $_POST['track6-prefix-id--hex'])) {
+	if (is_numeric("0x" . $_POST['track6-prefix-id--hex']))
 		$pconfig['track6-prefix-id'] = intval($_POST['track6-prefix-id--hex'], 16);
-	} else {
-		$pconfig['track6-prefix-id'] = "none";
-	}
+	else
+		$pconfig['track6-prefix-id'] = 0;
 	conf_mount_rw();
 
 	/* filter out spaces from descriptions  */
@@ -900,13 +896,12 @@ interface_sync_wireless_clones($wancfg, false);
 			case "track6":
 				$wancfg['ipaddrv6'] = "track6";
 				$wancfg['track6-interface'] = $_POST['track6-interface'];
-				if ($_POST['track6-prefix-id--hex'] === "") {
-					$wancfg['track6-prefix-id'] = "none";
-				} else if (is_numeric("0x" . $_POST['track6-prefix-id--hex'])) {
+				if ($_POST['track6-prefix-id--hex'] === "")
+					$wancfg['track6-prefix-id'] = 0;
+				else if (is_numeric("0x" . $_POST['track6-prefix-id--hex']))
 					$wancfg['track6-prefix-id'] = intval($_POST['track6-prefix-id--hex'], 16);
-				} else {
-					$wancfg['track6-prefix-id'] = "none";
-				}
+				else
+					$wancfg['track6-prefix-id'] = 0;
 				break;
 			case "none":
 				break;
@@ -1894,17 +1889,15 @@ function prefill_provider() {
 										<td width="22%" valign="top" class="vncell"><?=gettext("IPv6 Prefix ID"); ?></td>
 										<td width="78%" class="vtable">
 											<?php
-												if ($pconfig['track6-prefix-id'] == "none" || $pconfig['track6-prefix-id'] == "") {
-													$track6_prefix_id_hex = "";
-												} else {
-													$track6_prefix_id_hex = sprintf("%x", $pconfig['track6-prefix-id']);
-												}
+												if ($pconfig['track6-prefix-id'] == "")
+													$pconfig['track6-prefix-id'] = 0;
+												$track6_prefix_id_hex = sprintf("%x", $pconfig['track6-prefix-id']);
 											?>
 											<input name="track6-prefix-id--hex" type="text" class="formfld unknown" id="track6-prefix-id--hex" size="8" value="<?= $track6_prefix_id_hex ?>" />
 											<br />
 											<?= gettext("The value in this field is the (Delegated) IPv6 prefix id. This determines the configurable network ID based on the dynamic IPv6 connection"); ?>
 											<br />
-											<?= sprintf(gettext("Enter a <b>hexadecimal</b> value between %x and %x here, or leave blank."), 0, $ipv6_num_prefix_ids - 1); ?>
+											<?= sprintf(gettext("Enter a <b>hexadecimal</b> value between %x and %x here, default value is 0."), 0, $ipv6_num_prefix_ids - 1); ?>
 										</td>
 									</tr>
 									<tr>