From f7d7fd63628a1cb8be286cf1d35a0b7d2e9ca83d Mon Sep 17 00:00:00 2001
From: Franco Fichtner <franco@opnsense.org>
Date: Fri, 18 Jun 2021 10:06:38 +0200
Subject: [PATCH] interfaces: flush IPv6 addresses on PPP interfaces #4929

---
 src/opnsense/scripts/interfaces/ppp-linkdown.sh | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/opnsense/scripts/interfaces/ppp-linkdown.sh b/src/opnsense/scripts/interfaces/ppp-linkdown.sh
index fc4fcbff9..0aa4e91da 100755
--- a/src/opnsense/scripts/interfaces/ppp-linkdown.sh
+++ b/src/opnsense/scripts/interfaces/ppp-linkdown.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+export PATH=/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin:/usr/local/sbin
+
 IF="${1}"
 AF="${2}"
 IP="${3}"
@@ -52,6 +54,14 @@ elif [ "${AF}" = "inet6" ]; then
 
 	# Do not remove gateway used during filter reload.
 	rm -f /tmp/${IF}_routerv6 /tmp/${IF}upv6 /tmp/${IF}_ipv6
+
+	# flush stale IPv6 addresses since mpd5 will not do it
+	php << EOF
+<?
+require_once 'util.inc';
+require_once 'interfaces.inc';
+interfaces_addresses_flush('${IF}', 6);
+EOF
 fi
 
 daemon -f /usr/local/opnsense/service/configd_ctl.py dns reload