From 7a41d7378fdb6e10e2a02c14fa55683dddcd931e Mon Sep 17 00:00:00 2001
From: Ermal <eri@pfsense.org>
Date: Sat, 9 Feb 2013 13:23:25 +0000
Subject: [PATCH] Revert "Remove track6 dhcp configuration since dhcp6 will do
 this for us."

This reverts commit 6ebfa0ccfd7db500a4f85d2d45ebd74699a8805f.
---
 etc/inc/interfaces.inc | 41 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

diff --git a/etc/inc/interfaces.inc b/etc/inc/interfaces.inc
index 553f1b2713..bca9a24f9a 100644
--- a/etc/inc/interfaces.inc
+++ b/etc/inc/interfaces.inc
@@ -2995,7 +2995,7 @@ function interface_track6_configure($interface = "lan", $wancfg) {
 		case "dhcp6":
 			if ($g['debug'])
 				log_error("Interface {$interface} configured via {$wancfg['track6-interface']}  type {$type}");
-			/* NOTE dhcp6c will do the work for us so no need to do anything here. */
+			interface_track6_dhcp6_configure($interface, $wancfg);
 			break;
 	}
 
@@ -3121,6 +3121,45 @@ function interface_track6_6to4_configure($interface = "lan", $lancfg) {
 	return 0;
 }
 
+function interface_track6_dhcp6_configure($interface = "lan", $lancfg) {
+	global $config, $g;
+
+	if (!is_array($lancfg))
+		return;
+
+	/* If the interface is not configured via another, exit */
+	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']}");
+		return;
+	}
+
+	$wanif = get_real_interface($lancfg['track6-interface']);
+	$ifcfgipv6 = find_interface_ipv6($wanif);
+	if (is_ipaddrv6($ifcfgipv6)) {
+		$dhcp6lanarr = explode(":", Net_IPv6::uncompress($ifcfgipv6));
+		$dhcp6lanarr[4] = 0;
+		$dhcp6lanarr[5] = 0;
+		$dhcp6lanarr[6] = 0;
+		$dhcp6lanarr[7] = 1;
+		$dhcp6lan =  Net_IPv6::compress(implode(":", $dhcp6lanarr));
+		$lanif = get_real_interface($interface);
+		$oip = find_interface_ipv6($lanif);
+		if (is_ipaddrv6($oip))
+			mwexec("/sbin/ifconfig {$lanif} inet6 {$oip} delete");
+		log_error("dhcp6 {$interface} with ipv6 address {$dhcp6lan} based on {$lancfg['track6-interface']}");
+		mwexec("/sbin/ifconfig {$lanif} inet6 {$dhcp6lan} prefixlen 64");
+	}
+
+	return 0;
+}
+
 function interface_6rd_configure($interface = "wan", $wancfg) {
 	global $config, $g;