From fc0e31d71cd4f293fabe068355a4405285754c2c Mon Sep 17 00:00:00 2001
From: Renato Botelho <renato@netgate.com>
Date: Thu, 27 Oct 2016 07:32:03 -0200
Subject: Import a patch to fix Net_IPv6::compress("::")

Obtained from:	https://github.com/phil-davis/Net_IPv6/commit/638b96a253164b65c63825c38e79812b6c5f448d
Submitted by:	@phil-davis
---
 src/etc/inc/IPv6.inc | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/etc/inc/IPv6.inc b/src/etc/inc/IPv6.inc
index 5b7fb06..912fb06 100644
--- a/src/etc/inc/IPv6.inc
+++ b/src/etc/inc/IPv6.inc
@@ -740,8 +740,10 @@ class Net_IPv6
 
         }
 
-        $cip = preg_replace('/((^:)|(:$))/', '', $cip);
-        $cip = preg_replace('/((^:)|(:$))/', '::', $cip);
+        if ($cip != "::") {
+            $cip = preg_replace('/((^:)|(:$))/', '', $cip);
+            $cip = preg_replace('/((^:)|(:$))/', '::', $cip);
+        }
 
         if (empty($cip)) {
 
-- 
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