From a3607d04971300e1f56532226f36df8e1032d75d Mon Sep 17 00:00:00 2001
From: "Ycarus (Yannick Chabanois)" <ycarus@zugaina.org>
Date: Thu, 10 Sep 2020 20:59:35 +0200
Subject: [PATCH] Check if rule already exist

---
 shadowsocks-libev/files/ss-rules     | 12 +++++++-----
 v2ray-core/files/usr/bin/v2ray-rules | 12 +++++++-----
 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/shadowsocks-libev/files/ss-rules b/shadowsocks-libev/files/ss-rules
index d0cd133a1..5cb75dd57 100755
--- a/shadowsocks-libev/files/ss-rules
+++ b/shadowsocks-libev/files/ss-rules
@@ -166,11 +166,13 @@ ss_rules_iptchains_init() {
 }
 
 ss_rules_iptchains_init_mark() {
-	iptables-restore -w --noflush <<-EOF
-		*mangle
-		-A PREROUTING -m set --match-set ss_rules_dst_bypass_all dst -j MARK --set-mark 0x539
-		COMMIT
-	EOF
+	if [ "$(iptables -t mangle -L PREROUTING | grep ss_rules_dst_bypass_all)" = "" ]; then
+		iptables-restore -w --noflush <<-EOF
+			*mangle
+			-A PREROUTING -m set --match-set ss_rules_dst_bypass_all dst -j MARK --set-mark 0x539
+			COMMIT
+		EOF
+	fi
 }
 
 ss_rules_iptchains_init_tcp() {
diff --git a/v2ray-core/files/usr/bin/v2ray-rules b/v2ray-core/files/usr/bin/v2ray-rules
index 3e46911f6..d903ad412 100755
--- a/v2ray-core/files/usr/bin/v2ray-rules
+++ b/v2ray-core/files/usr/bin/v2ray-rules
@@ -166,11 +166,13 @@ v2r_rules_iptchains_init() {
 }
 
 v2r_rules_iptchains_init_mark() {
-	iptables-restore -w --noflush <<-EOF
-		*mangle
-		-A PREROUTING -m set --match-set ss_rules_dst_bypass_all dst -j MARK --set-mark 0x539
-		COMMIT
-	EOF
+	if [ "$(iptables -t mangle -L PREROUTING | grep ss_rules_dst_bypass_all)" = "" ]; then
+		iptables-restore -w --noflush <<-EOF
+			*mangle
+			-A PREROUTING -m set --match-set ss_rules_dst_bypass_all dst -j MARK --set-mark 0x539
+			COMMIT
+		EOF
+	fi
 }
 
 v2r_rules_iptchains_init_tcp() {