From 8ecfa95fff384ed047fd804016abdbbdcdd96d27 Mon Sep 17 00:00:00 2001
From: Keisuke MORI <kskmori@intellilink.co.jp>
Date: Wed, 11 Sep 2019 15:33:37 +0900
Subject: [PATCH] Low: IPaddr2: fix to work properly with unsanitized IPv6
 addresses

`ip route get` shows the sanitized address at $1 or $2 depending on
the address is already assigned to the node or not.
```
[root@centos73-1 ~]# /sbin/ip route get 2001:db8:101::0001
2001:db8:101::1 dev eth1  proto ra  src 2001:db8:101:0:XXXX:XXXX:XXXX:XXXX  metric 100
[root@centos73-1 ~]# /sbin/ip addr add 2001:db8:101::0001/64 dev eth1
[root@centos73-1 ~]# /sbin/ip route get 2001:db8:101::0001
local 2001:db8:101::1 dev lo  table local  proto none  src 2001:db8:101::1  metric 0
```

It can not be sanitized if the address is unreachable and on the recent distributions
(probably depending on the iproute package version)
```
[root@centos73-1 ~]# /sbin/ip route get 2001:db8:201::0001
unreachable 2001:db8:201::1 dev lo  table unspec  proto kernel  src 2001:db8:101:0:XXXX:XXXX:XXXX:XXXX  metric 429496
```
```
[root@rhel80-1 ~]# /sbin/ip route get 200:db8:201::0001
RTNETLINK answers: Network is unreachable
```
---
 heartbeat/IPaddr2 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/heartbeat/IPaddr2 b/heartbeat/IPaddr2
index 041ace3a2..4f28ddab6 100755
--- a/heartbeat/IPaddr2
+++ b/heartbeat/IPaddr2
@@ -477,6 +477,12 @@ ip_init() {
 		fi
 	else
 		FAMILY=inet6
+		# address sanitization defined in RFC5952
+		SANITIZED_IP=$($IP2UTIL route get $OCF_RESKEY_ip | awk '$1~/:/ {print $1}  $2~/:/ {print $2}')
+                if [ -n "$SANITIZED_IP" ]; then
+                    OCF_RESKEY_ip="$SANITIZED_IP"
+                fi
+
 		if ocf_is_true $OCF_RESKEY_lvs_support ;then
 			ocf_exit_reason "The IPv6 does not support lvs_support"
 			exit $OCF_ERR_CONFIGURED