From 31aabd0e8b5d7f4d782e744575a673303e1c1ab1 Mon Sep 17 00:00:00 2001
From: Richard Fuchs <rfuchs@sipwise.com>
Date: Tue, 29 Jan 2019 10:31:03 -0500
Subject: [PATCH] fix el init script inserting duplicate iptables rules

closes #696

Change-Id: Ie7d7bc6ec152c8b9cbae08422338563169158f97
(cherry picked from commit aaccc106307427774f9f1840a9af9a1bd632a2b4)
---
 el/rtpengine.init | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/el/rtpengine.init b/el/rtpengine.init
index 27f9459d5..736f243b5 100644
--- a/el/rtpengine.init
+++ b/el/rtpengine.init
@@ -169,10 +169,14 @@ start() {
   			firewall-cmd --reload
 		else
 			for fw in iptables ip6tables;do
-				$fw -N rtpengine
 				# We insert the rtpengine rule at the top of the input chain
-				$fw -t filter -I INPUT -j rtpengine
-				$fw -I rtpengine -p udp -j RTPENGINE --id "$TABLE"
+				if ! $fw -t filter -C INPUT -j rtpengine 2> /dev/null; then
+					$fw -N rtpengine
+					$fw -t filter -I INPUT -j rtpengine
+				fi
+				if ! $fw -I rtpengine -p udp -j RTPENGINE --id "$TABLE" 2> /dev/null; then
+					$fw -I rtpengine -p udp -j RTPENGINE --id "$TABLE"
+				fi
 			done
 		fi