From 19c4042f1eb0b06506e1ad7e32012c4cfddc1ade Mon Sep 17 00:00:00 2001
From: Tore Anderson <tore@fud.no>
Date: Mon, 20 May 2019 09:13:05 +0200
Subject: [PATCH] Strip prefix length before route lookup for $plat_prefix

Recent Linux kernels have removed the ability to do a `ip -6 route get` lookup
for destinations with a prefix length:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0eff0a274104487938d741b5c37aca1795afd184

Strip the prefix length before doing this lookup, so that it is done for the
first address in `$plat_prefix` instead.

Closes #12.
---
 clatd | 1 +
 1 file changed, 1 insertion(+)

diff --git a/clatd b/clatd
index d27e052..19be234 100755
--- a/clatd
+++ b/clatd
@@ -393,6 +393,7 @@ sub get_plat_dev {
   if(!$plat_prefix) {
     err("get_plat_dev(): No PLAT prefix to work with");
   }
+  $plat_prefix =~ s|/\d+$||;
   open(my $fd, '-|', cfg("cmd-ip"), qw(-6 route get), $plat_prefix)
     or err("get_plat_dev(): 'ip -6 route get $plat_prefix' failed to execute");
   while(<$fd>) {